Hitachi Universal Storage Platform V Reference Manual page 85
Hitachi universal storage platform user and reference guide
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Also See for Universal Storage Platform V:
- Configuration manual (70 pages) ,
- User manual (248 pages) ,
- User manual (188 pages)
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AC Input Power Failure Occurs
Detection of Power Failure
200 ms
Backup Mode
Power Failure
USP V/VM
Storage
System
Operating
1 minute
Destage Mode
USP V only
Power Failure
(battery option
Storage
required)
System
Operating
Notes:
1. When power is recovered after a failure while backup power is being supplied by battery, the storage system
operates depending on the status of the Auto-Power-On JP on the Operator panel:
ENABLE: The storage system is powered on automatically.
DISABLE: The storage system is powered on by operating the Power ON/OFF switch or the PCI.
2. When power is recovered after a failure during the destage process, the destage and power-off processes are
executed.
Figure 3-6
Hitachi Universal Storage Platform V/VM User and Reference Guide
Universal Storage Platform V:
48 hours: CM up to 128 GB
36 hours: CM 132 GB to 256 GB
*1
CM and SM are backed up by battery.
8 minutes
*2
Data destage process
Battery Backup Processes for Power Failure
Functional and Operational Characteristics
Universal Storage Platform VM:
36 hours
24 hours (CM up to 128 GB)
18 hours (CM 132 GB to 256 GB)
5 minutes
CM and SM are backed up by battery.
Power off process
3-41
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Troubleshooting
