NEC NEC Express5800 Series Operating manual

Maintenance Guide
Model Number: N8100-2103F/2104F
NEC Express Server
Express5800 Series
10.103.01-104.02
January 2014, 2nd Edition
© NEC Corporation 2014
Express5800/E120e-M
Chapter 1 Maintenance
Chapter 2 Useful Features
Chapter 3 Appendix

Documents Provided with This Product
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Documents Provided with This Product
Documents for this product are provided as accompanying booklets ( ) and as electronic manuals (
PDF
)
stored within EXPRESSBUILDER DVD ( ).
Precautions for Use
Describes points of caution to ensure the safe use of this server.
Read these cautions before using this server.
Getting Started
Describes how to use this server, from unpacking to operations.
Refer to this guide as you begin for an overview of this server.
PDF
User’s Guide
Chapter 1: General Description Overviews, names, and functions of the server’s parts
Chapter 2: Preparations Installation of additional options, connection of peripheral devices, and
ideal location for this server
Chapter 3: Setup System BIOS configurations and summary of EXPRESSBUILDER
Chapter 4: Appendix Specifications and other information
PDF
Installation Guide (Windows)
Chapter 1: Installing Windows Installation of Windows and drivers,
and important information for
installation
Chapter 2: Installing Bundled
Software
Installation of bundled software, such as NEC ESMPRO and Universal
RAID Utility
PDF
Maintenance Guide
Chapter 1: Maintenance Server maintenance and troubleshooting
Chapter 2: Useful Features Useful features and the detail of system BIOS settings, SAS
Configuration Utility, and EXPRESSBUILDER
Chapter 3: Appendix Error messages and Windows Event Logs
PDF
Other documents
Provides the detail of NEC ESMPRO, Universal RAID Utility, and the other features.
EXPRESSBUILDER

Contents
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Contents
Documents Provided with This Product.................................................................................................................2
Contents................................................................................................................................................................3
Notations Used in This Document.........................................................................................................................6
Notations used in the text..............................................................................................................................6
Hard disk drives............................................................................................................................................6
Removable media.........................................................................................................................................6
Abbreviations of Operating Systems (Windows)...........................................................................................7
Trademarks ...........................................................................................................................................................8
Regulatory Notices................................................................................................................................................9
License Notification .............................................................................................................................................12
Warnings and Additions to This Document..........................................................................................................13
Latest editions.............................................................................................................................................13
Chapter 1 Maintenance.....................................................................................................................................14
1. Transfer, Movement, and Disposal .................................................................................................................15
1.1 Transfer to a Third Party......................................................................................................................15
1.2 Disposal of the Server and Consumables............................................................................................16
1.3 Regarding the Transportation of This Server .......................................................................................16
1.4 Relocation and Storage........................................................................................................................16
2. Daily Maintenance..........................................................................................................................................18
2.1 Checking and Applying Updates..........................................................................................................18
2.2 Checking Alerts....................................................................................................................................18
2.3 Checking STATUS LED .......................................................................................................................19
2.4 Backup.................................................................................................................................................19
2.5 Cleaning...............................................................................................................................................19
2.5.1 Cleaning the server.................................................................................................................20
2.5.2 Cleaning the tape drive ...........................................................................................................20
2.5.3 Cleaning the keyboard and mouse..........................................................................................20
3. User Support...................................................................................................................................................21
3.1 Maintenance Services..........................................................................................................................21
3.2 Before Asking for Repair......................................................................................................................21
4. Collecting Failure Information .....................................................................................................................22
4.1 Collecting Event Logs......................................................................................................................22
4.1.1 Windows Server 2012........................................................................................................22
4.1.2 Windows Server 2008 R2 / Windows Server 2008............................................................24
4.2 Collecting Configuration Information................................................................................................25
4.2.1 Windows Server 2012........................................................................................................25
4.2.2 Windows Server 2008 R2 / Windows Server 2008............................................................26
4.3 Collecting User-Mode Process Dump..............................................................................................26
4.4 Collecting Memory Dump.................................................................................................................26

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5. Troubleshooting ..........................................................................................................................................27
5.1 Upon Power On to the End of POST...............................................................................................27
5.2 Upon Starting EXPRESSBUILDER..................................................................................................28
5.3 Upon Installing OS...........................................................................................................................29
5.4 When OS is Started .........................................................................................................................31
5.5 When STOP Error Occurs ...............................................................................................................33
5.6 When Operating a RAID System.....................................................................................................33
5.7 When Using Internal Devices and Other Hardware.........................................................................37
5.8 When OS is in Operation.................................................................................................................38
5.9 When EXPRESSBUILDER is Started on Windows..........................................................................39
5.10 For Bundled Software......................................................................................................................39
5.11 For Optical Disk Drive......................................................................................................................40
5.12 When Power Off ..............................................................................................................................40
6. Windows System Recovery ........................................................................................................................41
6.1 Recovery of Windows Server 2012..................................................................................................41
6.2 Recovery of Windows Server 2008 R2 and Windows Server 2008........................................................41
7. Resetting and Clearing the Server..................................................................................................................42
7.1 Software Reset....................................................................................................................................42
7.2 BMC Reset ..........................................................................................................................................42
7.3 Forced Shutdown.................................................................................................................................43
7.4 Clearing BIOS Settings (CMOS Memory)............................................................................................44
8. System Diagnostics ........................................................................................................................................47
8.1 Test Items.............................................................................................................................................47
8.2 Startup and Exit of System Diagnostics...............................................................................................47
9. Offline Tools....................................................................................................................................................50
9.1 Starting Offline Tools............................................................................................................................50
9.2 Functions of Offline Tools.....................................................................................................................51
9.3 Remote Control Feature ......................................................................................................................52
9.3.1 How to remotely control...........................................................................................................52
9.3.2 Preparation..............................................................................................................................52
Chapter 2 Useful Features................................................................................................................................53
1. System BIOS..................................................................................................................................................54
1.1 Starting SETUP....................................................................................................................................54
1.2 Parameter Descriptions .......................................................................................................................54
1.2.1 Main ........................................................................................................................................55
1.2.2 Advanced ................................................................................................................................56
1.2.3 Security...................................................................................................................................71
1.2.4 Server......................................................................................................................................73
1.2.5 Boot.........................................................................................................................................78
1.2.6 Save & Exit..............................................................................................................................80
2. BMC Configuration .........................................................................................................................................81
2.1 Starting BMC Configuration .................................................................................................................81
2.2 Main Menu...........................................................................................................................................82
2.3 Setting BMC Configuration ..................................................................................................................83
2.3.1 Network...................................................................................................................................84
2.3.2 User Management...................................................................................................................86
2.3.3 Mail Alert .................................................................................................................................88
2.3.4 SNMP Alert..............................................................................................................................90
2.3.5 System Operation ...................................................................................................................91
2.3.6 ECO ........................................................................................................................................92
2.3.7 Miscellaneous .........................................................................................................................94
2.4 Clear BMC Configuration.....................................................................................................................95
2.5 Resetting BMC.....................................................................................................................................95
2.6 Initializing BMC Configuration..............................................................................................................96

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3. Flash FDD.......................................................................................................................................................97
3.1 Notes on Using Flash FDD ..................................................................................................................97
3.1.1 Compensation for recorded data.............................................................................................97
3.1.2 Handling Flash FDD................................................................................................................97
3.1.3 Use in EXPRESSBUILDER.....................................................................................................98
4. Power Control Feature....................................................................................................................................99
4.1 Supported OS......................................................................................................................................99
4.2 Notes on Using Windows Server 2008 ................................................................................................99
5. RAID System Configuration..........................................................................................................................100
5.1 WebBIOS and Universal RAID Utility.................................................................................................100
6. Details of EXPRESSBUILDER .....................................................................................................................102
6.1 Starting EXPRESSBUILDER .............................................................................................................102
6.2 Menu..................................................................................................................................................102
6.3 Utilities Provided by EXPRESSBUILDER..........................................................................................105
7. EXPRESSSCOPE Engine 3.........................................................................................................................106
8. NEC ESMPRO..............................................................................................................................................107
8.1 NEC ESMPRO Agent (for Windows)..................................................................................................107
8.2 NEC ESMPRO Manager....................................................................................................................107
8.3 NEC ESMPRO Agent Extension........................................................................................................107
8.4 BMC Configuration.............................................................................................................................107
8.5 NEC ExpressUpdate Agent................................................................................................................107
9. NEC Product Info Collection Utility ...............................................................................................................108
9.1 Usage ................................................................................................................................................108
10. Universal RAID Utility.................................................................................................................................109
10.1 Creating Logical Drive of RAID 6.....................................................................................................109
11. Express Report Service / Express Report Service(HTTPS)....................................................................... 110
12. Express Report Service(MG)...................................................................................................................... 111
Chapter 3 Appendix ........................................................................................................................................112
1. POST Error Message....................................................................................................................................113
2. List of Windows Event Logs..........................................................................................................................127
3. Accessing Data for Electric Power, Temperature, and Processor Utilization.................................................137
3.1 Windows ............................................................................................................................................137
3.1.1 Power consumption...............................................................................................................137
3.1.2 Intake air temperature...........................................................................................................138
3.1.3 Processor utilization..............................................................................................................141
3.2 Linux..................................................................................................................................................142
3.2.1 Power consumption...............................................................................................................142
3.2.2 Intake air temperature...........................................................................................................143
3.2.3 Processor utilization..............................................................................................................143

Notations Used in This Document
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Notations Used in This Document
Notations used in the text
In addition to safety-related symbols urging caution, 3 other types of notations are used in this document.
These notations have the following meanings.
Important Indicates critical items that must be followed when handling the hardware
or operating
software. If the procedures described are not followed, hardware
failure, data loss, and
other serious malfunctions could occur.
Note
Indicates items that must be confirmed when handling the server or operating software.
Tips
Indicates information that is helpful to keep in mind when using this server.
Hard disk drives
Unless otherwise stated, hard disk drives (HDD) described in this document refer to both of the following.
•Hard disk drives (HDD)
•Solid state drive (SSD)
Removable media
Unless otherwise stated, removable media described in this document refer to both of the following.
•USB memory
•Flash FDD

Notations Used in This Document
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Abbreviations of Operating Systems (Windows)
Windows Operating Systems are referred to as follows.
Refer to Chapter 1 (1.2 Supported Windows OS) in Installation Guide (Windows) for detailed
information.
Notations in this document
Official names of Windows
Windows Server 2012 Windows Server 2012 Standard
Windows Server 2012 Datacenter
Windows Server 2008 R2
Windows Server 2008 R2 Standard
Windows Server 2008 R2 Enterprise
Windows Server 2008 *1 Windows Server 2008 Standard
Windows Server 2008 Enterprise
*1: Includes 64-bit and 32-bit Editions unless otherwise stated.
The following appears on EXPRESSBUILDER.
Windows Server 2008 64-bit Edition: Windows Server 2008 x64
Windows Server 2008 32-bit Edition: Windows Server 2008 x86

Trademarks
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Trademarks
EXPRESSSCOPE is a registered trademark of NEC Corporation.
Microsoft, Windows, Windows Server, Windows Vista, and MS-DOS are registered trademarks or trademarks of Microsoft
Corporation in the United States and other countries. Intel, Pentium, and Xeon are registered trademarks of Intel Corporation of the
United States. AT is a registered trademark of International Business Machines Corporation of the United States and other countries.
Adaptec, its logo, and SCSI Select are registered trademarks or trademarks of Adaptec, Inc. of the United States. LSI and the LSI
logo design are trademarks or registered trademarks of LSI Corporation. Adobe, the Adobe logo, and Acrobat are trademarks of
Adobe Systems Incorporated. DLT and DLTtape are trademarks of Quantum Corporation of the United States. PCI Express is a
trademark of Peripheral Component Interconnect Special Interest Group. Linux is a trademark or registered trademark of Linus
Torvalds in Japan and other countries. Red Hat® and Red Hat Enterprise Linux are trademarks or registered trademarks of Red Hat,
Inc. in the United States and other countries.
All other product, brand, or trade names used in this publication are the trademarks or registered trademarks of their respective
trademark owners.

Regulatory Notices
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Regulatory Notices
FCC Statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
Industry Canada Class A Emission Compliance Statement
This Class A digital apparatus complies with Canadian ICES-003.
Avis de conformité à la réglementation d'Industrie Canada
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
CE / Australia and New Zealand Statement
This is a Class A product. In domestic environment this product may cause radio interference in which case the
user may be required to take adequate measures (EN55022).
BSMI Statement
台湾電池規制（廃棄物清理法）
Turkey RoHS
警告:
如果更換錯誤電池會產生爆炸請以相同或同型電池更換使用

Regulatory Notices
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WEEE Directive
Chinese RoHS
Vietnam RoHS

Regulatory Notices
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Ukraine RoHS

License Notification
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License Notification
The System BIOS and Offline Tools of this product contain open source software for the following license.
EDK FROM TIANOCORE.ORG
BSD License from Intel
Copyright (c) 2004, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
following conditions are met:
・Redistributions of source code must retain the above copyright notice, this list of conditions and the following
disclaimer.
・Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with the distribution.
・Neither the name of the Intel Corporation nor the names of its contributors may be used to endorse or
promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
Copyright (c) 2004 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials are licensed and made available under the
terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be
found at http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Warnings and Additions to This Document
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Warnings and Additions to This Document
1. Unauthorized reproduction of the contents of this document, in part or in its entirety, is
prohibited.
2. The contents of this document may change without prior notice.
3. Do not make copies or alter the document content without permission from NEC Corporation.
4. Every effort has been made to ensure the completeness of this document. However, if you have
any concerns, or discover errors or omissions, please contact your retailer.
5. Regardless of these 4 items, NEC Corporation assumes no responsibility for effects resulting
from operations.
6. The sample values used in this document are not the actual values.
Keep this document nearby so that you may refer to it as necessary.
Latest editions
This document was created based on the information available at the time of its creation. The screen images,
messages and procedures may differ from the actual screens, messages and procedures. Substitute as
appropriate when content has been modified.
The most recent version of User’s Guide, as well as other related documents, is also available for download
from the following website.
http://www.nec.com/

Express5800/E120e-M Maintenance Guide
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NEC Express5800 Series
Express5800/E120e-M
Maintenance
This chapter explains maintenance of server, and what actions are to be taken in case of trouble when operating
this server.
1. Transfer, Movement, and Disposal
Describes how to transfer this server to a third party. Also describes how to dispose, move and store this
server.
2. Daily Maintenance
Describes what you must confirm for daily use, how to manage files, and how to clean the server.
3. User Support
Describes various services on this product.
4. Collecting Failure Information
Describes how to collect information about the location where a failure occurred and its cause when the
server malfunctions. Refer to this section in case of a failure.
5. Troubleshooting
Describes how to identify the causes of problems and what actions are to be taken to address them. Refer to
this section when you suspect a failure.
6. Windows System Recovery
Describes Windows recovery setup. Refer to this section when the Windows is corrupt.
7. Resetting and Clearing the Server
Describes how to reset or clear the server. Refer to this section when the server is not working or when you
want to restore BIOS settings to the factory settings.
8. System Diagnostics
Describes the system diagnostics of this server.
9. Offline Tools
Describes tools for preventive maintenance of this product.
1
1

1. Transfer, Movement, and Disposal
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Chapter 1 Maintenance
1.
Transfer, Movement, and Disposal
1.1
Transfer to a Third Party
Observe the following precautions when you transfer (or sell) the server or software provided with the server to
a third party.
Server
When transferring (or selling) the server to a third party, be sure to provide the server’s instructions
(including electronic manuals) to the third party.
Data on the hard disk drive
Be sure to erase the data stored in HDD to prevent the leakage of sensitive data (such as customer
information or company management information) to any third parties. It is the user’s responsibility to erase
the data.
Important NEC assumes no liability for data leakage should the product be transferred
to a third party without erasing the data.
Data seems to be erased when you empty "Recycle Bin" of Windows or execute the "format" command of
the operating system. However, the actual data remains on the hard disk drive. Data not erased completely
might be restored by special software and used for unexpected purposes.
Bundled software
Observe the following precautions when transferring (selling) the bundled software to a third party.
– Transfer them with the server.
– All provided media and documents must be transferred and no backup copies must be retained.
– Transfer requirements listed in "Software License Agreement" that comes with each software application
must be satisfied.
– Software on client PC must be uninstalled before transferring.

1. Transfer, Movement, and Disposal
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Chapter 1 Maintenance
1.2
Disposal of the Server and Consumables
•Dispose of the server, hard disk drives, DVD/CD-ROMs, option board, and battery according to laws and
regulations of the central and/or local government. Also dispose of the power cord attached to this product
together with the server to prevent diversion to other products.
Note
•For disposal (or replacement) of the battery on the motherboard of the server,
consult with your sales representative.
•It is the user’s responsibility to completely erase all data stored on storage
devices such as hard disk drives, backup data cartridges, or any other media
(such as CD-R/CD-RW) so that the data cannot be restored by a third party.
•Some components including fans, batteries, and the optical disk drive work for a limited period of time and
require replacement. For stable operation of the server, NEC recommends you regularly replace these
components. Contact your sales representative for information on replacement or the lifetime of
components.
1.3
Regarding the Transportation of This Server
This server and/or some of the associated optional devices uses lithium metal batteries or lithium ion batteries.
Regulations for air/ocean transportation apply when transporting lithium batteries. Conform to the
regulations if you want to transport this server or optional devices by air or ship.
1.4
Relocation and Storage
Follow the steps below when you move or store this server.
WARNING
Be sure to observe the following precautions to use the server safety. Failure to
observe the precautions may cause death or serious injury. For details, refer to
Safety precautions in Precautions for Use in "User’s Guide".
•Do not disassemble, repair, or alter the server.
•Do not remove the lithium battery, NiMH, or Li-ion battery.
•Disconnect the power plug before installing or removing the server.

1. Transfer, Movement, and Disposal
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Chapter 1 Maintenance
CAUTION
Be sure to observe the following precautions to use the server safely. Failure to
observe the precautions may cause burns, injury, and property damage. For
details, refer to Safety precautions in Precautions for Use in "User’s Guide".
•Make sure to complete installation.
•Do not get your fingers caught.
•Avoid installing under extreme temperature conditions.
Note •If the server needs to be relocated/stored due to a change in the floor layout to
a great extent, contact your service representative.
•If the server has hard disk drives, move the server while being careful not to
damage the drive.
•When storing the server, monitor the environmental conditions of the storage
area (temperature: −10°C to 55°C
, humidity: 20% to 80%). (No dew
condensation is permitted)
Tips Make backup copies of important data stored in the hard disk drive.
1. Power off the server (POWER LED goes off)
2. Unplug the power cord of the server from the power outlet.
3. Disconnect all the cables from the server
4. Pack the server securely to protect from damage, shock, and vibration.
Important If this server and internal optional devices are suddenly moved from a cold
place to a warm place, conden
sation will occur and cause malfunctions and
failures when these are used in such state. Wait for a sufficient period of time
before using the server and other components in the operating environment.
Note •Check and adjust the system clock before operating after relocating or storing
the server.
•If the system clock time is significantly delayed or advanced over time in spite
of adjustment, contact your sales representative.

2. Daily Maintenance
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Chapter 1 Maintenance
2.
Daily Maintenance
To use this server under top conditions at all times, periodically check and perform maintenance as follows. If
abnormalities are found, ask your sales representative, avoiding impossible operation.
2.1
Checking and Applying Updates
Express5800 Series posts update information for BIOS, FW (firmware), driver, and others of the server and
peripheral devices on our website. We recommend that the latest update always be applied for stable system
operation.
NEC corporate site: http://www.nec.com/
[Support & Downloads]
Tips •Download and apply the latest update yourself.
•NEC recommends that you back up data for a rainy day before applying the
latest update.
2.2
Checking Alerts
Use NEC ESMPRO Manager (for Windows) to constantly verify that no abnormalities are discovered on the
monitored server and that no alerts have been issued.
Example image of NEC ESMPRO Manager
NEC ESMPRO Manager
AlertViewer

2. Daily Maintenance
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Chapter 1 Maintenance
2.3
Checking STATUS LED
After powering on the server or before shutting down the system and powering off the server, check STATUS
LED on the front of the server. For the functions and descriptions of the LED, refer to Chapter 1 (5. Names and
Functions of Parts) in "User’s Guide".If the indicator shows the server abnormality, contact your salses
representative.
2.4
Backup
We recommend that you periodically back up the data on HDD.
If RAID System has been setup on your system, back up RAID Configuration Data. We also recommend that
you back up it after a rebuilt required due to HDD failure. For information on RAID Configuration Data backup,
refer to the utility offered by EXPRESSBUILDER in Chapter 2 (6. Details of EXPRESSBUILDER).
2.5
Cleaning
Regularly clean the server to keep it in good condition.
WARNING
Be sure to observe the following precautions to use the server safety. Failure to
observe the precautions may cause death or serious injury. For details, refer to
Safety precautions in Precautions for Use in "User’s Guide".
•Do not disassemble, repair, or alter the server.
•Disconnect the power plug before cleaning the server.

2. Daily Maintenance
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20
Chapter 1 Maintenance
2.5.1 Cleaning the server
Wipe the external surfaces of the server with a dry soft cloth. Follow the procedure below if stains remain on the
surfaces.
Important •Do not use volatile solvents such as thinner and benzene to clean the
server. Those solvents could damage or tarnish the material.
•The power outlet, cables, connectors on the rear panel of the server, and
the inside of the server must be kept dry.
1. Confirm that the power is OFF (POWER LED is OFF)
2. Unplug the power cord of the server from a power outlet.
3. Wipe off dust from the power cord plug with a dry cloth.
4. Soak a soft cloth in neutral detergent that is diluted with cold or lukewarm water, and squeeze it firmly.
5. Rub off stains on the server with the cloth prepared in step 4.
6. Soak a soft cloth in water, squeeze it firmly, and wipe the server with it once again.
7. Wipe the server with a dry cloth.
2.5.2 Cleaning the tape drive
A dirty tape drive head causes unsuccessful file backup and damages the tape cartridge. Periodically clean the
tape drive with the designated cleaning tape.
For the cleaning interval and method, the estimated usable period and lifetime of the tape cartridge, refer to the
instructions attached to the tape drive.
2.5.3 Cleaning the keyboard and mouse
Wipe the surface of the keyboard with a dry cloth after confirming that the whole system, including the server
and the peripherals, are shut down and POWER LED is off.
An optical mouse does not work properly if the lens area is not clean. Wipe the sensor with a dry cloth to remove
any dirt or dust.