Setting The Pool - Hitachi AMS2100 User Manual

Example:
•
% audmlu
Are you sure you want to release the DM-LU? (y/n [n]): y
The DM-LU has been released successfully.
%

Setting the POOL

Up to 64 data pools can be designated for each array, by assigning a logical
unit that has been created and formatted. Up to 64 logical units can be
assigned to each data pool. The accurate capacity of a data pool cannot be
determined immediately after an LU has been assigned. Data pool capacity
can only be confirmed approximately 3 minutes per 100 GB.
The following restrictions apply to LUs assigned to a data pool:
• Logical units once assigned to a data pool are no longer recognized by a
host.
• Because data will be lost when excess over the limited value of the
POOL capacity occurs, 20 GB at least is recommended as a standard
POOL capacity. Incidentally, when the POOL capacity being used
exceeds the threshold value (default value: usage rate of 70%), the
pair in the Split status is changed to the Pool full status.
• An LU with SAS drives, an LU with SAS7.2K drives, an LU with SSD
drives, an LU with SATA drives, and an LU with SAS (SED) drives
cannot coexist in a data pool.
• When using SnapShot with Cache Partition Manager, the segment size
of the LU belonging to a data pool must be the default size (16 kB) or
less.
The following is the procedure for creating a POOL for storing differential
data for use by SnapShot.
To designate data Pool(s) (POOL(s)):
1. From the command prompt, register the array to which you want to
create the Data Pool, then connect to the array.
2. Execute the aupool command create a Data Pool.
First, display the LUs to be assigned to a Data Pool, and then create a
Data Pool.
The following is the example of specifying LU 100 for Data Pool 0.
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
–unit array-name –rm -lu 0
Operations using CLI
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