Buffalo TeraStation TS5420DN0 User manual

Network Attached Storage
TeraStation 5020
User Manual
Please make sure to read this manual before using and follow the procedures. If you have any inquiries about
the product, contact the number on the warranty statement or the packing box. Do not discard the included
documents, the warranty statement, or the packing box.
www.buffaloamericas.com
35022387-02
November 2022

Table of Contents
Chapter 1 Notice .............................................................9
Regulatory Compliance Information..............................................9
Warning Symbols and Graphical Icons on the Product.................9
Safety Precautions ...........................................................................9
Chapter 2 Getting Started .......................................... 11
Diagrams........................................................................................ 11
4-Bay and 8-Bay Desktop Models, 4-Bay Rackmount Model ...............11
12-Bay Rackmount Model .......................................................................14
Turning the TeraStation On and Off............................................. 16
Creating a USB Initialization Drive .............................................. 16
Accessing Settings ........................................................................ 16
Opening Settings .....................................................................................17
Configuring Settings via Setup Wizard ..................................................19
Checking the Device Information from Dashboard ..............................20
Shutting Down or Restarting the TeraStation from Settings ...............20
Chapter 3 File Sharing................................................. 22
Configuring Shared Folders ......................................................... 22
Adding a Shared Folder...........................................................................22
Recycle Bin................................................................................................24
Read-Only Shares.....................................................................................24
Hidden Shares ..........................................................................................25
Configuring Users ......................................................................... 25
Adding a User...........................................................................................25
1

Importing User Information....................................................................28
Adding a Group ............................................................................. 28
Configuring Access Restrictions .................................................. 31
Restricting Local User Access to Shared Folders ...................................31
Restricting AD Domain User Access to Shared Folders.........................33
Restricting Access to Subfolders ............................................................36
Accessing from a macOS Device .................................................. 38
Accessing from an NFS Client....................................................... 39
Offline Files for Windows.............................................................. 44
Chapter 4 RAID Modes and Drive Management ....... 47
Available RAID Modes .................................................................. 47
Working with RAID Arrays............................................................ 48
Using JBOD...............................................................................................48
Creating a RAID Array..............................................................................49
Shutting Down the TeraStation Automatically If an Error Occurs........50
Rebuilding the RAID Array Automatically for the TS51220RH.............52
Configuring Actions for If a Drive Used for the RAID Array Has Not Been
Detected ...................................................................................................53
Configuring a Hot Spare..........................................................................56
Expanding RAID Capacity Without Deleting Data ................................57
RAID Scanning..........................................................................................61
Configuring Low Drive Space Alerts............................................ 62
Adding an External Drive ............................................................. 63
Dismounting Drives ...................................................................... 64
Using the Function Button ......................................................................64
Using Settings ..........................................................................................65
Checking Drives ............................................................................ 65
2

S.M.A.R.T. ....................................................................................... 67
Displaying S.M.A.R.T. Information .........................................................67
Checking the Drive Condition.................................................................68
Formatting Drives ......................................................................... 68
Encrypting Drives.......................................................................... 70
Erasing Data on the TeraStation Completely.............................. 70
Quotas............................................................................................ 71
Limits for Shared Folders ........................................................................71
Limits for LVM Volumes ...........................................................................72
Using the TeraStation as an iSCSI Device .................................... 74
Introduction .............................................................................................74
Creating an iSCSI Volume........................................................................75
Connecting or Disconnecting Volumes..................................................77
Using with Multiple Computers..............................................................78
Configuring Access Restrictions .............................................................78
Expanding Volume Sizes .........................................................................82
Deleting Volumes.....................................................................................83
Enabling the iSNS Protocol .....................................................................84
Advanced iSCSI Volume Settings............................................................85
Chapter 5 Backup ........................................................ 87
Using Snapshots............................................................................ 87
Overview ..................................................................................................87
Application for iSCSI Volume Snapshots ...............................................87
Manually Creating a Snapshot................................................................87
Accessing the Snapshots via SMB...........................................................91
Restoring Snapshots................................................................................93
Configuring Schedule Snapshot.............................................................97
3

Configuring Snapshot Archive Settings...............................................101
Backing Up Data on the TeraStation.......................................... 106
Backup Modes........................................................................................107
Preparing a Backup Destination...........................................................110
Configuring a Backup Job .....................................................................112
If Backing Up from rsync-Compatible Devices to the TeraStation.....117
Restoring Backup Data..........................................................................117
Backup Logs for If Backup Fails ............................................................121
Replication................................................................................... 124
Preparing a Replication Destination ....................................................125
Configuring a Replication Job ..............................................................127
Synchronizing Between Source and Destination TeraStations
Periodically.............................................................................................130
Failover ........................................................................................ 131
Before Configuring Failover..................................................................131
Usage Restrictions .................................................................................132
Configuring Failover..............................................................................133
Changing Settings While Failover Is Configured.................................135
Maintenance Mode ................................................................................135
Synchronizing Between Main and Backup TeraStations Periodically138
Switching to the Backup TeraStation Manually...................................139
Reconfiguring After Failover Occurs ....................................................140
Stopping Failover...................................................................................142
Backing Up Your Mac with Time Machine ................................. 144
Chapter 6 Cloud Services and Remote Access......... 150
Synchronizing with Amazon S3 ................................................. 150
Creating an Amazon S3 Job ..................................................................150
Uploading Files to Amazon S3..............................................................153
4

Synchronizing with Dropbox ..................................................... 156
Creating a Dropbox Sync Job................................................................157
Changing Job Settings ..........................................................................159
Creating a Shared Link (Windows Only)...............................................162
Using Microsoft Azure for Data Preservation ........................... 162
Creating an Azure Storage Sync Backup Job.......................................162
Creating an Azure Storage Sync Restore Job.......................................170
Changing Job Settings ..........................................................................175
Synchronizing with Microsoft OneDrive................................... 177
Creating a OneDrive Sync Job...............................................................177
Changing Job Settings ..........................................................................188
Corrective Actions for in Case of Error .................................................190
WebAccess ................................................................................... 193
Configuring WebAccess.........................................................................193
Accessing via WebAccess.......................................................................196
Unable to Create a BuffaloNAS.com Name..........................................197
FTP................................................................................................ 198
Chapter 7 Security Enhancement............................. 201
Two-Factor Authentication ........................................................ 201
Enabling Two-Factor Authentication ...................................................201
Restricting Logins for Non-Admin Users..............................................207
Disabling Two-Factor Authentication ..................................................208
Encrypting Data Transmission ................................................... 210
Encrypting Settings Data ......................................................................210
Encrypting FTP Transfer Data ...............................................................211
SSL...........................................................................................................211
5

Chapter 8 Settings Backup/Restoration .................. 213
Saving and Applying Settings.................................................... 213
Saving Settings ......................................................................................214
Applying Settings ..................................................................................214
Transferring Another Buffalo NAS Device’s Settings ............... 215
Creating a Config File (.nas_config)......................................................216
Transferring Settings.............................................................................216
Restoring Factory Defaults......................................................... 217
Initializing from Settings ......................................................................217
Initializing Using the USB Initialization Drive .....................................218
Resetting the Administrator Password ..................................... 219
Chapter 9 Network Settings ..................................... 220
Wake-on-LAN .............................................................................. 220
Port Trunking............................................................................... 220
SNMP............................................................................................ 224
Proxy Server ................................................................................ 226
Jumbo Frames ............................................................................. 227
Changing the IP Address ............................................................ 228
Mapping IP Address and Hostname .......................................... 229
Chapter 10 Advanced Features ................................ 232
Email Notification ....................................................................... 232
Sleep Mode .................................................................................. 234
UPS (Uninterruptible Power Supply)......................................... 236
One PSU Device Is Installed...................................................................237
6

Two PSU Devices Are Installed..............................................................238
Automatic Shutdown If Power Supply Fails.............................. 240
Logs .............................................................................................. 241
Displaying TeraStation’s Logs ...............................................................241
Transferring Logs to the Syslog Server ................................................242
Creating a Shortcut to the Logs in the Shared Folder.........................243
Changing Archive Rules for File Access Logs.......................................244
Updating the Firmware............................................................... 246
Updating Manually Using Settings ......................................................246
Enabling Automatic Update..................................................................247
Configuring Update Notification..........................................................248
Name, Date, Time, and Language .............................................. 249
Beep Alerts .................................................................................. 251
LCD and LEDs............................................................................... 252
Chapter 11 Drive Replacement and Troubleshooting ...
..................................................................................... 254
Replacing a Defective Drive on the TS51220RH ....................... 254
Drive Replacement for a Redundant RAID Array.................................254
Drive Replacement for a RAID 0 Array .................................................256
Drive Replacement for a JBOD..............................................................257
Drive Replacement for a Hot Spare ......................................................257
Replacing a Defective Drive on Models Other Than the
TS51220RH .................................................................................. 257
Drive Replacement for a Redundant RAID Array or JBOD (TeraStation Is
On)...........................................................................................................258
Drive Replacement for a Redundant RAID Array or JBOD (TeraStation Is
Off)..........................................................................................................262
7

Drive Replacement for a RAID 0 Array .................................................262
Drive Replacement for a Hot Spare ......................................................263
Replacing a Non-Malfunctioning Drive..................................... 264
Re-Inserting Drives ..................................................................... 264
TeraStation Does Not Work Properly......................................... 265
Power LED Keeps Blinking ....................................................................265
Booting the TeraStation in Emergency Mode......................................267
Unable to Access Shared Folders ............................................... 267
Opening the Network Credentials Window .........................................267
Restoring Owner and Permission Settings ..........................................268
Configuring Compatible SMB Protocols ..............................................270
Cleaning the Dustproof Filter .................................................... 270
Chapter 12 Utilities.................................................... 273
NAS Navigator2........................................................................... 273
Windows .................................................................................................273
macOS.....................................................................................................273
NovaBACKUP ............................................................................... 273
Chapter 13 Appendix ................................................ 274
LCD Panel..................................................................................... 274
Modes .....................................................................................................274
Errors.......................................................................................................275
Notices ....................................................................................................276
Information Events ................................................................................277
Default Settings .......................................................................... 279
Specifications .............................................................................. 280
8

Chapter 1 Notice
Regulatory Compliance Information
For Customers in the United States
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
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.
Warning Symbols and Graphical Icons on the Product
Warning symbols are used on the product for safety operation and prevention of injury to you and damage to the
unit. The following explains the meanings of symbols used on the product.
This symbol indicates important warnings or cautions for operation and maintenance.
Additional information will follow this symbol.
This symbol indicates the presence of an alternating current.
This symbol indicates that the equipment may carry risk of electric shock.
This symbol indicates danger of hazardous high voltage.
This symbol indicates a protective earthing terminal.
This symbol indicates that the protective conductor should be connected first to the protective
earthing terminal.
This symbol indicates that the rack-mounted equipment should not be used for a shelf or a work
space.
Safety Precautions
Before using your device, basic safety instructions should always be followed.
(1) Read these instructions.
(2) Keep these instructions.
(3) Heed all warnings and follow all instructions.
9
Chapter 1 Notice