Controller components
The following figures show the front and rear views of a controller chassis
and the tables list the description of the components.
Figure 3 Controller, front view
Table 5 Controller components - front
Item
Name Min Max Description
1 Control
Panel
1 1 See Power control panel on page 108.
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
flash drive (small kit) or a 256 GB SSD flash drive (large kit).
If the power fails, the cache is protected from data loss by the backup
batteries and the cache flash memory (SSD). The batteries keep the cache
active up to 32 minutes while the data is copied to the SSD.
30 Introduction
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
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