HP Store Once 2700, 4500 and 4700 Maintenance and Service Guide

6 RAID cache module and SuperCapacitor failures
Spares part numbers
NOTE: Never move cache modules from one RAID controller to another within or between systems.
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 replacement procedures and
spares part numbers.
• HP StoreOnce 2700 and HP StoreOnce 4500 Backup have one cache module with
SuperCapacitor.
• HP StoreOnce 4700 Backup has two cache modules with SuperCapacitor, one for each RAID
card in PCIe slot 1 and PCIe slot 4 .
Identifying the cache module or SuperCapacitor failure
If the SuperCapacitor is disconnected on the first RAID card in the HP StoreOnce 4700, or on the
only RAID card in the StoreOnce 2700 or 4500 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.
In the following example the SuperCapacitor module has been disconnected from or failed on the
second RAID card in an HP StoreOnce 4700 Backup.
Example alerts
Subject: HP StoreOnce 4700 Backup hardwarecomponent.failure event
The following event occurred: hardwarecomponent.failure
Severity: ALERT
Date: Wed Aug 21 14:17:11 UTC 2013
Appliance: HPCZ225101H9
System URL(s): http://_IP_Address1>, http://<IP_Address2>
component:superCapacitor, status:MISSING, location:superCapacitor in storageController S/N:PCUUVX58S4B004 in
PCI Slot 4 in server HPCZ225101H9, Message: The supercap is missing or has failed., Diagnostic message: Check
the connections to the supercap. If the supercap is fully connected, replace the supercap.,
uuid:50014380254FAA50_BAT_1, eventId:001C0004, level:ALERT, category:SERVER, overallStatus:DEGRADED, name:
ch_34303936-3738-5A43-3232-353130314839 , engine name: hpcz225101h9
Using the StoreOnce CLI
1. Run the StoreOnce CLI command:
hardware show problems
This will display warnings for all hardware components and, in our example, assist in identifying
the RAID controller and component that is causing a problem.
2. To drill down to the hardware component causing the problem run the StoreOnce CLI command:
hardware show status <Dev-id>
# hardware show status
Name Dev-id Status
-------------------- ------------------------------------ --------
HPCZ225101H9 34303936-3738-5A43-3232-353130314839 DEGRADED
28 RAID cache module and SuperCapacitor failures