Hitachi AMS 2100, Hardware Manual

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Hardware components
Hitachi AMS 2100/2300 Storage System Hardware Guide
The following illustration shows the front of an expansion unit (factory
designation RKAK) with the decorative bezel removed and the disk drives in
the front of the array exposed.
Figure 4-18: Expansion Unit Front View
Disk drives
As shown in #1 in Figure 4-11 above, an AMS 2100/2300 expansion unit
has 15 drive slots in the front of the array. Each slot can accommodate one
SATA drive or one SAS drive.
Disk drive configurations
The following requirements are for the expansion unit as well as for both the
AMS 2100 and the AMS 2300 base units.
• The minimum number of drives that must be installed in the base unit
is four.
• The first four drives that are installed must be either all SAS drives or
all SATA drives.
• After the minimum configuration is met, you can add two SAS or two
SATA drives (which makes a RAID1 configuration), or other
combinations of drives as required to meet the RAID configurations
specified in Chapter 1.
Table 4-18: Expansion Unit Front View
Item Description Item Description Item Description

Disk Drives, showing
the status LEDs
1
1. Enlarged views are shown on pages 4-18 and 4-19.

Locate LED

Power LED