Hitachi VSP N800 - Insulation Performance

Item Specification
Note:
■
All 12 slots must be fully
installed with DIMMs.
■
Each DIMM is replaceable
when they fail.
■
The DIMM is not common
and cannot be used with
DKC DIMM.
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 storage 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
significantly and the remaining battery capacity is not sufficient; 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 Specification
Insulation withstand voltage AC 1,500 V (100 mA, 1 min)
Insulation resistance DC 500 V, 10 M Ω or more
VSP N800 mechanical specifications
Appendix A: Mechanical specifications for VSP N800
VSP N800 Hardware Reference Guide 64