Hitachi G900 - Electrical and Environmental Specifications

Cache specications
Item Specification
Capacity (GB per controller) 1,024 GB
Control method Read LRU/Write after
Battery backup Provided
Backup duration
*
Unrestricted (Saving to a nonvolatile
memory)
*
Non-volatile data in the cache memory is pr
otected against sudden power failure. The
backup operation writes data into a cache, even if a power interruption occurs, and
transferred to the cache ash memory.
Insulation performance
Item Specification
Insulation withstand voltage AC 1,500 V (100mA, 1min)
Insulation resistance DC 500 V, 10 MΩ or more
Electrical specifications
The electrical input power specications for the storage systems are described in the
following table.
Item Controller Drive tray
Input voltage (operable
voltage r
ange) (V)
AC 200-240 +6%/-11% SFF, LFF, FMD, and dense
intermix drive tray: AC
200-240 +6%/-11%
Frequency (Hz) 50/60 ±1
Number of phases, cabling Single-phase with protective grounding
Steady-state current 100V/
200V
1
,
2
CBL: 4.0x2 SFF drive tray: 2.4x2/1.2x2
LFF drive tray: 1.9x2/1.0x2
FMD tray: 2.6x2/1.3x2
Dense intermix drive tray:
-/3.0x2
Electrical specications
Appendix B: System Specications
Hitachi Virtual Storage Platform G900 Hardware Reference Guide 71