Setup; Setting The Command Device - Hitachi AMS 2000 User Manual

Setup

The following sections provide procedures for setting up CCI for TCE.

Setting the command device

The command device is used by CCI to conduct operations on the array.
• Logical units used as command devices must be recognized by the
host.
• The command device must be 33 MB or greater.
• Assign multiple command devices to different RAID groups to avoid
disabled CCI functionality in the event of drive failure.
•
If a command device fails, all commands are terminated. CCI supports an
alternate command device function, in which two command devices are
specified within the same array, to provide a backup. For details on the
alternate command device function, refer to the Hitachi Adaptable Modular
Storage Command Control Interface (CCI) User's Guide.
To designate a command device
1. From the command prompt, register the array to which you want to set
the command device, and then connect to the array.
2. Execute the aucmddev command to set a command device. When this
command is run, logical units that can be assigned as a command device
display, then the command device is set. To use the CCI protection
function, enter enable following the -dev option. The following is an
example of specifying LU 2 for command device 1.
•
% aucmddev –unit array-name –availablelist
Available Logical Units
%
% aucmddev –unit array-name –set –dev 1 2
Are you sure you want to set the command devices?
The command devices have been set successfully.
%
3. Execute the aucmddev command to verify that the command device is
set. For example:
•
% aucmddev –unit array-name –refer
Command Device LUN
1
%
B–2
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
LUN Capacity RAID Group DP Pool RAID Level
2 35.0 MB
3 35.0 MB
(y/n [n]): y
2
Operations using CCI
0 N/A 6( 9D+2P)
0 N/A 6( 9D+2P)
RAID Manager Protect
Disable
Type Status
SAS Normal
SAS Normal