ATTO Technology Diamond Storage Array VT-Class - Manual (Page 80)

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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
10.1 Hot Swap Operating Instructions
To maintain array up time, individual disk drive sled assemblies, power supplies and blower assemblies
can be replaced with the unit fully operational. Special instructions need to be followed to perform these
operations.
Disk Drives
CAUTION CAUTION
• Individual disk drive sled assemblies may be
replaced while the array is operating with no other
intervention only if there is absolutely no activity
on that drive.
• Failure to ensure no activity may destroy any data
on that drive and possibly stop the entire
Diamond-VT operation. Please follow the
instructions below using CLI commands to
replace drives.
• Do not leave empty openings on the front or rear
of the Diamond-VT under any circumstances.
Empty openings affect airflow and may cause the
unit to overheat and shut down.
• All modular components must be replaced by
qualified personnel only. Components are
electrostatic sensitive. Use a static wriststrap
when handling any of the cards inside the
Diamond-VT. Use proper grounding methods.
Always store spare components in proper ESD
containers when not in use.
Follow your backup procedures before removing a
sled. You may copy drives using the appropriate CLI
commands (See Drive Management Commands on page
41).
The following method is the safest way to perform
a hot swap of a drive.
The general approach: identify the disk drive sled to be
replaced, take it offline using the appropriate CLI
commands, turn off its power using CLI commands,
remove and replace with a new disk drive sled, power
up the new sled, and place back on line.
1 Connect to Diamond-VT services (see
Accessing the Diamond-VT on page 15) and enter
the Command Line Interface mode.
2 The fault LED should be blinking on the disk
drive sled to be replaced. If it is not, type set
SledFaultLED [n] on. The LED of the drive you
want [n] will light.
3 Determine the Drive Sled Number. The disk
drive sled closest to the management card is
always the number 1 disk drive sled.
4 The Drive Sled Number identified in step 2 is
the SledNum variable to be entered into the CLI
commands. Take the disk drive sled offline by
entering the following CLI commands at the
control computer
R e a d y prompt:
Set AtaDiskState (SledNum, 1, OFFLINE)
Set AtaDiskState (SledNum, 2, OFFLINE)
Set DriveSledPower (SledNum, OFF)
CAUTION CAUTION
In a Hot Spare configuration, a drive sled should
only be taken offline if there is absolutely no
activity on that drive. If there is any activity, the
rebuild of the Hot Spare sled may be flawed.
5 Wait 30 seconds for the disk drive sled to spin
down and complete any remaining I/O activity.
6 Unscrew the two screws on the disk drive sled
with the appropriate tool.
7 Carefully pull the disk drive sled out of chassis
using its handle.
8 Mark or tag the disk drive sled with the
Diamond Array serial number, the date
removed, and its slot number.
9 Place the disk drive sled in an appropriate ESD
container or bag.
10 Install the replacement disk drive sled into the
array chassis using proper ESD control steps
and with the proper orientation (The disk drive
sled assembly is keyed and can only be
inserted one way).
11 Tighten the two screws on the disk drive sled
with the appropriate tool.
12 If you do not have AutoRebuild enabled, using
the disk drive sled number identified in step 2,
on the control computer Ready prompt type:
ClearDiskReservedArea (SledNum, 1)
ClearDiskReservedArea (SledNum, 2)
Set AtaDiskState (SledNum, 1, ONLINE)
Set AtaDiskState (SledNum, 2, ONLINE)
ResolveLUNConflicts
The new disk drive sled will be available for
system use 10 to 15 seconds after the disk
drives spin up and communication is
reestablished.