Hitachi G200 - Replacement Parts

Cache specications
Item Specifications
Capacity (GB) 64 GB
Control method Read LRU, Write after
Battery backup Provided
Backup duration Unrestricted (saving to a nonvolatile
memory)
Data in the cache memory is preserved against power failures. If a power outage occurs,
data in cache memory is written to drives.
When the stor
age system enters Cache Backup mode, the amber WARNING LED goes on
to when the system starts. This warning indicates that the battery charge has dropped
signicantly and the remaining battery capacity is not sucient; the storage system will
continue operating with the Write Cache function disabled.
When the battery is charged, the warning indication disappears, and the storage system
continues the operation in the Write Cache function.
The warning indication disappears within six hours. Even when the warning is shown,
normal operation is assured in Write-Through. Read and write performance is lowered
because the Write Cache function is disabled.
If the storage system is not charged for more than six months, the battery can become
overcharged and sustain unrecoverable damage. To avoid this situation, charge the
battery more than 3 hours every six months.
Insulation performance
Item Specifications
Insulation withstand voltage AC 1,500 V (100 mA, 1 min)
Insulation resistance DC 500 V, 10 M Ω or more
VSP G200 mechanical specications (DC po
wer supply model)
Appendix A: Mechanical specications for VSP G200
Hitachi Virtual Storage Platform G200 Hardware Reference Guide 84