Cache specications
Item Specification
Capacity (per controller) 512 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 protected 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 specications for the storage systems are described in the
following table.
Item Controller Drive tray
Input voltage (operable
voltage range) (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 specications
Appendix B: System specications
Hitachi Virtual Storage Platform G900 Hardware Reference Guide 73