Component
Specification
DBF
2 U
Dense intermix drive tray
4 U
Cache specifications
Item
Specification
Capacity (GB)
VSP G400: 128
VSP G600: 256
NAS module Cache Capacity
DDR3 DIMM 8GB x 12 [Slot]
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
108
Storage system specifications
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide
Summary of Contents for Virtual Storage Platform G400
Page 1: ...Hitachi Virtual Storage Platform G600 Hardware Reference Guide MK 94HM8022 05 June 2016 G400 ...
Page 6: ...6 Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...
Page 16: ...16 Preface Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...
Page 123: ...Hitachi Virtual Storage Platform G400 G600 Hardware Reference Guide ...