HP StoreOnce 2700 - RAID Cache Module and Supercapacitor Failures; About the Supercapacitor and RAID Cache Module; Replacing the RAID Cache Module and Supercapacitor

RAID cache module and SuperCapacitor
failures
About the SuperCapacitor and RAID cache module
The RAID cache module is slotted onto the RAID card; the SuperCapacitor is located in the center of the
unit, clipped to the floor of the chassis behind the disk cage. These items ensure cache contents are
maintained after a loss of power.
The HPE StoreOnce 4900 Backup has two cache modules with SuperCapacitor, one for each RAID card
in PCIe slot 1 and PCIe slot 4.
NOTE:
Never move cache modules from one RAID controller to another within or between systems.
If the SuperCapacitor is disconnected on the first RAID card in the HPE StoreOnce 4900 Backup, the
system will not boot. If boot fails, it is a good idea to check that the SuperCapacitor is seated correctly.
If the SuperCapacitor or cache module has failed, the system may still boot with error messages and it
will run more slowly.
The replacement spares part numbers are:
• SuperCapacitor, spares part number 660093–001
• RAID cache, spares part number 633542–001
If replacing this module does not resolve the problem, it may be necessary to replace the RAID controller
card. See the previous chapter for more information about RAID card replacement procedures and
spares part numbers.
Replacing the RAID cache module and SuperCapacitor
NOTE: The recommendation is to replace both the SuperCapacitor and RAID cache module at the same
time, regardless of which element has failed.
Procedure
1. Remove the cover from the HPE StoreOnce Backup system, as described in the appropriate HPE
ProLiant Maintenance and Service guide, and locate the module.
2. Look at the LEDs on the module. If the LEDs are blinking amber the module should be replaced. If
they are flashing amber and green, the module is disconnected.
3. If the module is disconnected, reseat it on the HP p1224 or p1228 RAID card. If it is damaged, remove
it, dispose of the old module and replace it with the new one. Check that the cable is connected
correctly to the SuperCapacitor..
RAID cache module and SuperCapacitor failures 43