IBM TotalStorage FAStT EXP700, Installation And User Manual

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Chapter 3. Installing and replacing devices
This chapter contains information about installing and replacing devices.
Working with hot-swap hard disk drives
This section explains how you can increase the expansion unit capacity by adding
more hard disk drives or replacing existing drives with ones containing a larger
capacity. Before you begin:
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Read the safety and handling guidelines provided in “Safety” on page xi and in
“Handling static-sensitive devices” on page 11.
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Ensure that your current system configuration is working properly.
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Back up all important data before you make changes to data storage devices.
Before you install or remove drive CRUs, review the following information:
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Blank trays: An expansion unit 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.
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Drive CRUs: Your expansion unit supports IBM 2 GB Fibre Channel hard disk
drives.
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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 8 on page 53. (If you install a drive in the
wrong bay, you might lose data.)
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Drive LEDs: Each drive tray has two LEDs, which indicate the status for that
drive. See Table 6 for the drive LED states and descriptions.
Table 6. Drive LED activity
LED LED state Descriptions
Activity LED Green flashing The green LED flashes to indicate Fibre Channel activity to
the drive.
Activity LED Green lit The green LED is lit to indicate the drive is properly
installed.
Fault LED Amber flashing The amber LED flashes to indicate a drive rebuild is
underway, or that a drive has been identified by the
software.
Fault LED Amber lit The amber LED is lit to indicate a drive failure.
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Fibre Channel loop IDs: When you install a hard disk drive in the expansion
unit, the drive tray connects into a printed circuit board called the midplane . The
midplane sets the Fibre Channel loop ID automatically, based on the setting of
the enclosure ID switch and the physical location (bay) of the drive CRU.
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Hot-swap hardware: Your expansion unit contains hardware that enables you to
replace a failed hard disk drive without turning off the expansion unit. You can
continue to operate your system while a hard disk drive is removed or installed.
These drives are known as hot-swap hard disk drives.
© Copyright IBM Corp. 2002
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