Dell SC7020 User manual

Dell Storage Center
SC7020 Storage System
Owner’s Manual

Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better use of your computer.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you
how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
©2016 Dell Inc. All rights reserved. This product is protected by U.S. and international copyright and intellectual
property laws. Dell and the Dell logo are trademarks of Dell Inc. in the United States and/or other jurisdictions. All other
marks and names mentioned herein may be trademarks of their respective companies.
2016 - 08
Rev. A

Contents
About This Manual................................................................................................... 4
Revision History.....................................................................................................................................4
Audience................................................................................................................................................4
Contacting Dell......................................................................................................................................4
1 SC7020 Storage System Hardware.................................................................... 5
SC7020 Storage System Front-Panel Features and Indicators........................................................... 5
SC7020 Storage System Back-Panel Features and Indicators............................................................ 6
SC7020 Storage System Drives.............................................................................................................7
SC7020 Storage System Drive Numbering.......................................................................................... 8
SC7020 Storage Controller Features and Indicators .......................................................................... 8
SC7020 Storage Controller.............................................................................................................8
2 Replacing SC7020 Storage System Components......................................... 11
Safety Precautions............................................................................................................................... 11
Installation Safety Precautions.......................................................................................................11
Electrical Safety Precautions..........................................................................................................11
Electrostatic Discharge Precautions............................................................................................. 12
General Safety Precautions........................................................................................................... 12
Bezel.....................................................................................................................................................13
Remove the Front Bezel................................................................................................................ 13
Install the Front Bezel.................................................................................................................... 13
Hard Drives ..........................................................................................................................................13
Identify the Failed Drive.................................................................................................................14
Remove the Failed Drive................................................................................................................14
Install the Replacement Drive....................................................................................................... 14
Rack Rails............................................................................................................................................. 15
Remove the Rack Rails.................................................................................................................. 15
Install the Rack Rails...................................................................................................................... 16
Power Supply/Cooling Fan Modules.................................................................................................. 16
Identify the Failed Power Supply...................................................................................................17
Identify the Failed Cooling Fan......................................................................................................17
Replace a Power Supply/Cooling Fan Module............................................................................. 17
3 SC7020 Storage System Technical Specifications.......................................20
Technical Specifications..................................................................................................................... 20
3

Preface
About This Manual
This manual describes the features and technical specifications of an SC7020 storage system.
Revision History
Document Number: 680-108-001
Revision Date Description
A August 2016 Initial release
Audience
The information provided in this manual is intended for use by Dell end users.
Contacting Dell
Dell provides several online and telephone-based support and service options. Availability varies by
country and product, and some services might not be available in your area.
To contact Dell for sales, technical support, or customer service issues, go to www.dell.com/support.
• For customized support, type your system service tag on the support page and click Submit.
• For general support, browse the product list on the support page and select your product.
4

1
SC7020 Storage System Hardware
The SC7020 storage system ships with Dell Enterprise drives, two redundant power supply/cooling fan
modules, and two redundant storage controllers.
Each storage controller contains the front-end, back-end, and management communication ports of the
storage system.
SC7020 Storage System Front-Panel Features and
Indicators
The front panel of the SC7020 contains power and status indicators, and a system identification button.
In addition, the hard drives are installed and removed through the front of the storage system chassis.
Figure 1. SC7020 Storage System Front-Panel View
Item Name Icon Description
1 Power indicator Lights when the storage system power is on
•Off – No power
•On steady green – At least one power supply is providing
power to the storage system
2 Status indicator Lights when at least one power supply is supplying power to
the storage system
•Off – No power
•On steady blue – Power is on and firmware is running
•Blinking amber – Fault detected
SC7020 Storage System Hardware 5

Item Name Icon Description
3 Identification
button
Blinking blue (continuously) – A command was sent by Dell
Storage Manager to the storage system to make the LED blink
so that users can identify the storage system in the rack.
The identification LED blinks on the control panel of the
chassis, to allow users to find the storage system when
looking at the front of the rack.
The identification LEDs on the storage controllers also blink,
which allows users to find the storage system when looking at
the back of the rack.
4 Hard drives — Can have up to 30 internal 2.5-inch SAS hard drives
SC7020 Storage System Back-Panel Features and
Indicators
The back panel of the SC7020 contains the storage controller indicators and power supply indicators.
Figure 2. SC7020 Storage System Back-Panel View
Item Name Icon Description
1 Power supply/
cooling fan module
(PSU) (2)
Contains a 1485 W power supply and fans that provide
cooling for the storage system, with AC input to the power
supply of 200-240 V.
An LED between the top of the handle and the bottom of the
handle indicates whether the PSU has AC/input power.
•Green – A valid power source is connected to the PSU and
the power supply is operational.
•Not lit – The PSU is off or the power source has a fault.
2 Storage controller
(2)
— Each storage controller contains:
•Mezzanine card with four SFP+ ports or four RJ45
10GBASE-T ports
– Left two ports are for file storage.
– Right two ports are for block storage.
•Expansion slots for additional I/O cards
6SC7020 Storage System Hardware

Item Name Icon Description
– Slots for optional front-end connectivity – Fibre
Channel and iSCSI I/O cards
– Slots for optional back-end connectivity – SAS I/O
cards
•SAS expansion ports – Two 12 Gbps SAS ports
•USB port – Single USB 2.0 port
•MGMT port – Embedded Ethernet port that is typically
used for system management
•Serial port – Micro-USB serial port used for initial
configuration and support-only functions
3 Power switch (2) — Controls power for the storage system. Each PSU has one
switch.
4 Power supply/
cooling fan module
LED handle
—The handle of the PSU indicates the DC power status of the
PSU and the fans.
•Not lit – No power
•Solid green – PSU has valid power source and is
operational.
•Blinking amber – Error condition in a PSU
•Blinking green – Firmware is being updated.
•Blinking green then off – Power supply mismatch
5 Power socket (2) — Accepts the following standard computer power cords:
• IEC320-C13 for deployments worldwide
• IEC60320-C19 for deployments in Japan
SC7020 Storage System Drives
The SC7020 storage system supports Dell Enterprise hard disk drives (HDDs) and Dell Enterprise solid-
state drives (eSSDs) only.
The drives in the SC7020 storage system are installed horizontally. The indicators on the drives provide
status and activity information.
Figure 3. SC7020 Storage System Drive Indicators
Item Control/Feature Indicator Code
1 Drive activity
indicator
•Blinking green – Drive has I/O activity
•Steady green – Drive is detected and has no faults
2 Drive status
indicator
•Steady green – Normal operation
•Blinking green – A command was sent by Dell Storage Manager to
the disk to make the LED blink so that users can identify the disk in
the rack.
•Blinking amber – Hardware or firmware fault
SC7020 Storage System Hardware 7

SC7020 Storage System Drive Numbering
An SC7020 holds up to 30 drives, which are numbered from left to right in rows starting from 0 at the
top-left drive. Drive numbers increment from left to right, and then top to bottom such that the first row
of drives is numbered from 0 to 4 from left to right, and the second row of drives is numbered from 5 to
9 from left to right.
The Dell Storage Manager Client identifies drives as XX-YY, where XX is the number of the unit ID of the
storage system and YY is the drive position inside the storage system.
Figure 4. SC7020 Drive Numbering
SC7020 Storage Controller Features and Indicators
The SC7020 storage system includes two storage controllers in two interface slots.
SC7020 Storage Controller
The following figure shows the features and indicators on an SC7020 storage controller.
Figure 5. SC7020 Storage Controller
Item Control/Feature Icon Description
1 Identification LED Blinking blue (continuously) – A command was sent by Dell
Storage Manager to the storage system to make the LED blink so
that users can identify the storage system in the rack.
The identification LED blinks on the control panel of the chassis,
which allows users to find the storage system when looking at
the front of the rack.
8SC7020 Storage System Hardware

Item Control/Feature Icon Description
The identification LEDs on the storage controllers also blink,
which allows users to find the storage system when looking at
the back of the rack.
2 Cache to Flash (C2F) •Off – Running normally
•Blinking green – Running on battery
3 Health status •Off – Unpowered
•Amber – Powering up
•Blinking amber
– Slow blinking amber (2s on, 1s off) – Controller hardware
fault was detected. Use the Dell Storage Manager UI for
specific details about what is actually wrong.
– Fast blinking amber (4x per second) – Power good and the
pre-operating system is booting
•Blinking green
– Slow blinking green (2s on, 1s off) – Operating system is
booting
– Blinking green (1s on, 1s off) – System is in safe mode
– Fast blinking green (4x per second) – Firmware is updating
•Solid green – Running normal operation
4I/O card slots Ports for an I/O card installed in riser 1 are numbered 1 to 4 from
left to right.
Ports for I/O cards installed in riser 2 are numbered 1 to 4 from
right to left.
5 Serial port (micro USB) Used to initially configure a storage controller. It is also used
under the supervision of Dell Technical Support to troubleshoot
and support systems.
6 MGMT port — Ethernet port used for storage system management and access
to Dell Storage Manager.
Two LEDs with the port indicate link status (left LED) and activity
status (right LED):
•Link and activity indicators are off – Not connected to the
network
•Link indicator is green – The NIC is connected to a valid
network at its maximum port speed.
•Link indicator is amber – The NIC is connected to a valid
network at less than its maximum port speed.
•Activity indicator is blinking green – Network data is being
sent or received.
7 USB port One USB 2.0 connector that is used for SupportAssist diagnostic
files when the storage system is not connected to the Internet.
8 Mini-SAS port B (ports
1 and 2)
Back-end expansion ports 1 and 2
SC7020 Storage System Hardware 9

Item Control/Feature Icon Description
9 Mezzanine card Two LEDs beneath each port provide connectivity information:
•Off – No connectivity
•Steady green, left LED – Link (full speed 10GBASE-T)
•Steady amber, left LED – Link (degraded speed)
•Blinking green, right LED – Activity
10 SC7020 Storage System Hardware

2
Replacing SC7020 Storage System
Components
This section describes how to remove and install components of the SC7020 storage system.
This information assumes that you have received the replacement component and are ready to install it.
Safety Precautions
Always follow these safety precautions to avoid injury and damage to Storage Center equipment.
If equipment described in this section is used in a manner not specified by Dell, the protection provided
by the equipment could be impaired. For your safety and protection, observe the rules described in the
following sections.
NOTE: See the safety and regulatory information that shipped with each Storage Center
component. Warranty information is included within this document or as a separate document.
Installation Safety Precautions
Follow these safety precautions:
• Dell recommends that only individuals with rack-mounting experience install the SC7020 in a rack.
• Make sure the storage system is always fully grounded to prevent damage from electrostatic
discharge.
• When handling the storage system hardware, use an electrostatic wrist guard (not included) or a
similar form of protection.
The chassis must be mounted in a rack. The following safety requirements must be considered when the
chassis is being mounted:
• The rack construction must be capable of supporting the total weight of the installed chassis. The
design should incorporate stabilizing features suitable to prevent the rack from tipping or being
pushed over during installation or in normal use.
• To avoid danger of the rack toppling over, slide only one chassis out of the rack at a time.
Electrical Safety Precautions
Always follow electrical safety precautions to avoid injury and damage to Storage Center equipment.
• Provide a suitable power source with electrical overload protection. All Storage Center components
must be grounded before applying power. Make sure that a safe electrical earth connection can be
made to power supply cords. Check the grounding before applying power.
• The plugs on the power supply cords are used as the main disconnect device. Make sure that the
socket outlets are located near the equipment and are easily accessible.
Replacing SC7020 Storage System Components 11

• Know the locations of the equipment power switches and the room's emergency power-off switch,
disconnection switch, or electrical outlet.
• Do not work alone when working with high-voltage components.
• Use rubber mats specifically designed as electrical insulators.
• Do not remove covers from the power supply unit. Disconnect the power connection before
removing a power supply from the storage system.
• Do not remove a faulty power supply unless you have a replacement model of the correct type ready
for insertion. A faulty power supply must be replaced with a fully operational module power supply
within 24 hours.
• Unplug the storage system chassis before you move it or if you think it has become damaged in any
way. When powered by multiple AC sources, disconnect all power sources for complete isolation.
Electrostatic Discharge Precautions
Always follow electrostatic discharge (ESD) precautions to avoid injury and damage to Storage Center
equipment.
Electrostatic discharge (ESD) is generated by two objects with different electrical charges coming into
contact with each other. The resulting electrical discharge can damage electronic components and
printed circuit boards. Follow these guidelines to protect your equipment from ESD:
• Dell recommends that you always use a static mat and static strap while working on components in
the interior of the chassis.
• Observe all conventional ESD precautions when handling plug-in modules and components.
• Use a suitable ESD wrist or ankle strap.
• Avoid contact with backplane components and module connectors.
• Keep all components and printed circuit boards (PCBs) in their antistatic bags until ready for use.
General Safety Precautions
Always follow general safety precautions to avoid injury and damage to Storage Center equipment.
• Keep the area around the storage system chassis clean and free of clutter.
• Place any system components that have been removed away from the storage system chassis or on a
table so that they are not in the way of other people.
• While working on the storage system chassis, do not wear loose clothing such as neckties and
unbuttoned shirt sleeves. These items can come into contact with electrical circuits or be pulled into
a cooling fan.
• Remove any jewelry or metal objects from your body. These items are excellent metal conductors
that can create short circuits and harm you if they come into contact with printed circuit boards or
areas where power is present.
• Do not lift the storage system chassis by the handles of the power supply units (PSUs). They are not
designed to hold the weight of the entire chassis, and the chassis cover could become bent.
• Before moving the storage system chassis, remove the PSUs to minimize weight.
• Do not remove drives until you are ready to replace them.
NOTE: To ensure proper storage system cooling, hard drive blanks must be installed in any hard
drive slot that is not occupied.
12 Replacing SC7020 Storage System Components

Bezel
The front bezel is a cover for the front panel of the SC7020 storage system.
Remove the Front Bezel
Before you remove or install hard drives in the storage system, remove the front bezel.
1. Use the system key to unlock the keylock at the left end of the bezel.
2. Lift the release latch next to the keylock.
3. Rotate the left end of the bezel away from the front panel.
4. Unhook the right end of the bezel and pull the bezel away from the storage system.
Figure 6. Installing and Removing the Bezel
1. Keylock 2. Front bezel
Install the Front Bezel
To secure the storage system, install the front bezel.
1. Hook the right end of the replacement bezel onto the front panel of the storage system.
2. Insert the left end of the bezel into the securing slot until the release latch locks into place.
3. Secure the bezel with the keylock.
Hard Drives
The SC7020 storage system supports hot-swappable hard drives.
The SC7020 storage system supports a minimum of 7 internal 2.5-inch drives up to a maximum of 30
drives. The drives are installed from left to right, and then top to bottom. The first row of drives are
Replacing SC7020 Storage System Components 13

numbered from 0–4 from left to right, the second row of drives are numbered from 5–9 from left to
right, and so on.
The Dell Storage Manager Client identifies drives as XX-YY, where XX is the number of the unit ID of the
storage system and YY is the drive position inside the storage system.
Figure 7. SC7020 Drive Numbering
Identify the Failed Drive
To determine which drive failed, use the Dell Storage Manager Client.
1. Click the Hardware tab.
2. In the Hardware tab navigation pane, select the Enclosures node.
3. Click the Disks tab.
4. Find the drive with the status of Down.
5. Record the location of the drive from the Name column.
Remove the Failed Drive
Use this procedure to remove a drive from the SC7020 storage system.
1. Remove the front bezel from the storage system.
2. Locate the failed hard drive in the storage system.
3. Press the release button to open the hard drive carrier release handle.
4. Slide the hard drive carrier out of the hard drive slot.
Install the Replacement Drive
Use this procedure to install a drive in the SC7020 storage system.
Steps
1. Open the release handle on the drive carrier and insert the hard drive carrier into the open drive slot.
2. Slide the drive into the slot until the drive carrier contacts the midplane.
3. Close the drive carrier handle to lock the drive in place.
4. Continue to push firmly until you hear a click and the drive carrier handle fully engages.
Next steps
Install the front bezel on the storage system.
14 Replacing SC7020 Storage System Components

Rack Rails
Rack rails are used to install the storage controller into a rack.
Remove the Rack Rails
Perform the following steps to remove rack rails for an SC7020 storage system.
Prerequisites
1. Use SupportAssist to send diagnostic data to Dell Technical Support.
2. Shut down the storage system using the Dell Storage Manager Client.
About this task
NOTE: Replacing rack rails must be performed during a scheduled maintenance window when the
Storage Center system is unavailable to the network.
Steps
1. Make sure all the cables are labeled.
2. Disconnect all of the cables from the storage system.
3. Loosen the screws in the chassis ears that secure the chassis to the rack.
Figure 8. Loosen the Screws
4. Remove the storage system from the rack.
5. Remove the rack rails from the rack.
Replacing SC7020 Storage System Components 15

Install the Rack Rails
Perform the following steps to install rack rails for an SC7020 storage systems.
Steps
1. Install the replacement rack rails in the rack.
2. Install the storage system in the rack.
3. Tighten the screws in the chassis ears that secure the chassis to the rack.
Figure 9. Tighten the Screws
4. Reconnect the cables to the storage system.
5. Start up the storage system.
Next steps
Use SupportAssist to send diagnostic data to Dell Technical Support.
Power Supply/Cooling Fan Modules
The SC7020 storage system supports two hot-swappable power supply/cooling fan modules.
The cooling fans that cool the storage system and the power supplies are integrated into the power
supply/cooling fan module and cannot be replaced separately. If one power supply/cooling fan module
fails, the second module continues to provide power to the storage system.
NOTE: When a power supply/cooling fan module fails, the cooling fan speed in the remaining
module increases significantly to provide adequate cooling. The cooling fan speed decreases
gradually when a new power supply/cooling fan module is installed.
16 Replacing SC7020 Storage System Components

CAUTION: A single power supply/cooling fan module can be removed from a powered-on
storage system for no more than 90 seconds. If a power supply/cooling fan module is removed
for longer than 90 seconds, the storage system might shut down automatically to prevent
damage.
Identify the Failed Power Supply
To determine which power supply failed, use the Dell Storage Manager Client.
1. Click the Hardware tab.
2. In the Hardware tab navigation pane, select the Controllers node.
3. Click the Power Supplies tab.
4. Find the power supply with a status of Down.
5. Record the location of the failed power supply.
Identify the Failed Cooling Fan
To determine which cooling fan failed, use the Dell Storage Manager Client.
1. Click the Hardware tab.
2. In the Hardware tab navigation pane, select the Controllers node.
3. Click the Fans tab.
4. Find the fan with a status of Down.
5. Record the location of the failed fan.
Replace a Power Supply/Cooling Fan Module
Use this procedure to replace failed power supply/cooling fan modules.
About this task
You can replace power supply/cooling fan modules one at a time without shutting down the storage
system.
Steps
1. Before replacing a power supply/cooling fan module, use SupportAssist to send diagnostic data to
Dell Technical Support.
2. Press the power switch on the power supply/cooling fan module to turn it off. To prevent the
module from overheating, replace it within 3 minutes.
3. Remove the hook-and-loop strap that secures the power cable and disconnect the power cable
from the power supply/cooling fan module.
Replacing SC7020 Storage System Components 17

Figure 10. Removing the Hook and Loop Strap from the Power Cable
1. Hook-and-loop strap
4. Push the release tab on the power supply/cooling fan module to the right and use the handle to slide
the module out of the chassis.
CAUTION: The power supply/cooling fan modules are heavy. To avoid injury, use both hands
while removing the module.
Figure 11. Removing a Power Supply/Cooling Fan Module
1. Release tab 2. Power supply/cooling fan module
3. Power supply cage
5. Slide the replacement power supply/cooling fan module into the chassis until it is fully seated and
the release tab clicks into place.
18 Replacing SC7020 Storage System Components

6. Connect the power cable to the power supply/cooling fan module and make sure the cable is
plugged into a power outlet.
7. Secure the power cable using the hook-and-loop strap.
8. Press the power switch on the power supply/cooling fan module to turn it on.
NOTE: Allow several seconds for the storage system to recognize the power supply/cooling fan
module and determine its status. When the power supply/cooling fan module is functioning
properly, the AC power status indicator turns green and the power supply/cooling fan status
indicator is off.
9. In the Dell Storage Manager Client, make sure that the replacement power supply is recognized and
shows as up and running.
10. After replacing a power supply/cooling fan module, use SupportAssist to send diagnostic data to Dell
Technical Support.
Replacing SC7020 Storage System Components 19

3
SC7020 Storage System Technical
Specifications
Technical Specifications
The technical specifications of the SC7020 storage systems are displayed in the following tables.
Drives
SAS hard drives Up to 30 2.5-inch SAS hot-swappable hard drives (12GB SAS)
Storage Controllers
Storage controllers Up to two hot-swappable storage controllers with one mezzanine card and
three IO slots.
Each storage controller has an internal battery backup unit. Write cache is
mirrored between the two storage controllers. If a power failure occur, the
battery backup unit provides power to the storage controller so that the write
cache can be saved to an SSD within the storage controller.
Storage Connectivity
Configurations Storage Center supports up to 168 drives in one redundant-path SAS chain.
• An SC7020 supports up to 12 SC400 expansion enclosures or 6 SC420
expansion enclosures.
Redundant Array of Independent Disks (RAID)
Controller Two hot-swappable storage controllers
Management RAID management using the Dell Storage Manager Client
Back-Panel Ports Connectors (per Storage Controller)
Fibre Channel, iSCSI, or
SAS connectors
Connection to a Fiber Channel fabric, iSCSI network, and SAS
Ethernet connectors MGMT - 100 Mbps, or 1 Gbps embedded Ethernet port used for Storage
Center management
SAS connectors 12GB SAS connectors for additional expansion enclosures
NOTE: SAS connectors are SFF-8086/SFF-8088 compliant.
20 SC7020 Storage System Technical Specifications