Figure 2 Controller, front view
Table 5 Controller components, front view
Item Name Min Max Description
1 Control
Panel
1 1 See
Power control panel (on page 119) .
2 Cache
Backup
Module
(BKM)
2 4 Backup memory modules are installed in pairs and referred to
as a backup memory kit. Each module contains two batteries
and either a 128-GB SSD (small kit) or a 256-GB SSD (large kit).
If the power fails, the cache is protected fr
om data loss by the
backup batteries and the cache ash memory (SSD). The
batteries keep the cache active up to 32 minutes while the data
is copied to the SSD.
3
■
Virtual
storag
e
direct
or
(2.1-
GHz)
■
Virtual
storag
e
dir
ect
or
(2.3-
Ghz)
2 (1
pair)
8 (4
pairs)
A VSD may contain either an Intel Xeon 2.1GHz or 2.3GHz 8-core
microprocessor. The VSDs must be installed in pairs and the
VSDs control the fr
ont-end directors, back-end directors, PCI
Express interface, local memory, and communication to the SVP.
The VSDs are independent of the front-end directors and back-
end directors, and can be shared across them.
System controller chassis
Chapter 2: Storage system hardware overview
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 34
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