Adding An Expansion Unit; Adding An Expansion Unit With The Array Power Turned On - Hitachi AMS 2100 Hardware Manual

• When adding an expansion unit with the array power turned off:
a. Install all the disk drives to be added in the expansion unit.
b. Connect the ENC cables between the expansion units and the base
unit and other expansion units.
c. Turn on the power. See
power turned off on page
• Do not add any optional parts while the system is booting up. Before
adding any parts, ensure that there are no Warning or Alarm LEDs on
anywhere in the system, and wait until after the Ready LED on the base
unit is ON before adding any parts.

Adding an expansion unit

You can add an expansion unit with the array power turned ON or turned
OFF, but the procedures are different. See the following procedures,
depending on the status of the array.
•
Table 9-4: Procedures for Adding an Expansion Unit
Array Power
ON
OFF

Adding an expansion unit with the array power turned on

Complete the following steps to add an expansion unit with the array power
turned on.
1. Install a set of appropriate rails in the rack in which you plan to install
the expansion unit.
2. Unpack the expansion unit.
3. Install the expansion unit in the rack.
4. If the disk drives are not already installed in the expansion unit, remove
the expansion unit front bezel, install the disk drives, and replace the
front bezel.
NOTE:
• The minimum number of drives that must be installed in an expansion
units is two. These two drives must both be either SATA or SAS drives.
• After the minimum configuration is met, you can add two SAS or two
SATA drives (which makes a RAID 1 configuration), or other
combinations of drives as required to meet the RAID configurations
specified in Chapter 1.
5. Connect the ENC cables from the expansion unit to the base unit or to
another expansion unit. See the instructions and connection diagram in
Connecting ENC cables (expansion unit) on page
9–10
Procedure for adding the expansion unit with the array power
turned on"
Procedure for adding the expansion unit in the status that the
array power is turned off"
Upgrading the hardware
Hitachi AMS 2100/2300 Storage System Hardware Guide
Adding an expansion unit with the array
9-11.
Procedure to Use
5-36.