Working With Hot-Swap Hard Disk Drives - IBM TotalStorage DS4000 EXP100 Installation, User's, And Maintenance Manual

Working with hot-swap hard disk drives

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This section explains how you can increase the expansion enclosure capacity by
adding more hard disk drives or by replacing existing drives with ones that have a
larger capacity. Before you begin, complete the following tasks:
v Read the safety and handling guidelines in "Safety" on page xi and in "Handling
static-sensitive devices" on page 30.
v Ensure that your current system configuration is working properly.
v Back up all important data before you make changes to data storage devices.
Before you install or remove drive CRUs, review the following information:
v Blank trays: An expansion enclosure without a full set of drives (14) contains
blank trays in the unused drive bays. Before installing new drives, you must
remove these empty trays. Save the empty trays for future use. Each of the 14
bays must always contain either a blank tray or a hot-swap hard disk drive.
Important:
1. For proper cooling and EMC protection, do not leave a drive slot open
without either a drive blank or a drive CRU inserted.
2. Before you insert the new SATA drive option or drive CRU/FRU into the
DS4000 configuration, you must ensure that the installed DS4000 controller
and EXP100 ESM have the minimum controller and ESM firmware versions
that are required for the new SATA drive. Always check the documentation
that is included with the new drive to find out the minimum controller and
ESM firmware versions, or any prerequisite tasks, for DS4000 controller and
EXP100 ESM.
v Drive CRUs: The EXP100 supports IBM 1.5 Gbps SATA hard disk drives only.
Note: Do not use Fibre Channel hard disk drive CRUs in the EXP100.
Attention: After you remove a drive CRU, wait 70 seconds before replacing or
reseating the drive CRU to allow the drive to properly spin down. Failure to do so
may cause undesired events.
v Drive CRU labels: A label is provided on the front of each hard disk drive. Use
this label to record the location information for each drive before you remove it.
Ensure that you keep track of the drives and their corresponding bays. Also,
record the location information in Table 22 on page 118. If you install a drive in
the wrong bay, you might lose data.
v Drive LEDs: Each drive tray has two associated LEDs, a green Activity LED and
an amber Fault LED, on the chassis of the EXP100. These LEDs indicate the
status for that drive. See Table 12 for the drive LED states and descriptions.
Table 12. Drive LED activity
LED LED state
Activity LED Flashing green The green LED flashes to indicate Fibre Channel activity to
Activity LED Steady green
Fault LED Flashing
amber
Fault LED Steady amber
Descriptions
the drive.
The green LED lights to indicate that the drive is properly
installed and is spun up by the DS4000 controller.
The amber LED flashes to indicate that a drive has been
identified by the software.
The amber LED lights to indicate a drive failure.
Chapter 3. Installing and replacing devices
73