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16 Sun StorageTek 2500 Series Array Hardware Installation Guide • March 2007
Caution – Potential loss of data access – Never remove a power-fan assembly, a
controller module, or a disk drive unless the Service Action Allowed LED is turned
on or you are given specific instructions to do so by the Common Array Manager
software Service Advisor.
If a module fails and must be replaced, the Service Action Required LED on that
module turns on to indicate that a service action is required. The Service Action
Allowed LED also will turn on if it is safe to remove the module. If there are data
availability dependencies or other conditions that dictate that a module should not
be removed, the Service Action Allowed LED remains off.
The Service Action Allowed LED automatically turns on or turns off as conditions
change. In most cases, the Service Action Allowed LED turns on when the Service
Action Required (Fault) LED is turned on for a module.
Note – If the Service Action Required (Fault) LED is turned on but the Service
Action Allowed LED is turned off for a particular module, you might have to service
another component first. Check the Common Array Manager software Service
Advisor to determine the action you should take.
Disk Drives
Disk drives for the Sun StorageTek 2500 Series Array have three components: a hard
drive, a hard drive carrier, and an adapter card for connecting the disk drive to the
midplane. The disk drives can be Serial Advance Technology Attachment (SATA)
disk drives, Fibre Channel (FC) disk drives, or SAS disk drives.
Controller trays or drive expansion trays hold up to 12 disk drives, for a maximum
of 36 disk drives in a storage array. To reach the maximum of 36 disk drives, the
storage array must consist of one controller tray and two drive expansion trays.
Access to disk drives is from the front of the tray.
Refer to the storage array release notes for supported drives.
Note – The disk drives in your tray might differ in appearance from those shown
here. The variation does not affect their function.