User`s guide

• RAIDset configurations for availability and performance
• RAIDset hardware requirement
6.5.1 Creating a RAIDset
Enter the following commands to create a RAIDset:
1. Use the ADD DISK container-name SCSI-location command to add new disk
drives to your configuration and name them.
CLI> ADD DISK DISK0 1 0 0
2. Use the ADD RAIDSET container-name container-name1 container-name2
[container-nameN] command and set the appropriate replacement policy and
reconstruct qualifiers. You are not required to set a replacement policy or
reconstruct rate.
The following is an example for using the replacement policy and reconstruct
qualifiers on the same command line as the ADD RAIDSET command:
CLI> ADD RAIDSET R3 DISK100 DISK200 DISK300 POLICY=BEST_FIT
RECONSTRUCTION=NORMAL
Where:
R3 is the name assigned to the RAIDset.
DISK100, DISK200, and DISK300 are the names assigned to the RAIDset
members of a three-member RAIDset.
POLICY=BEST_FIT is the replacement policy qualifier that will be used when
a RAIDset member fails. (You can choose between three different replacement
policy qualifiers: POLICY=BEST_FIT, POLICY=BEST_PERFORMANCE, or
NOPOLICY.)
RECONSTRUCTION= rate is the reconstruction rate qualifier that is
used when a RAIDset member fails and a new member is taken from the
spareset as a replacement for the failed device. You can choose between
two reconstruct qualifiers: RECONSTRUCT=NORMAL (the default), or
RECONSTRUCT=FAST.
3. Enter the INITIALIZE command for your RAIDset. This is the time to specify
your chunk size. The metadata on the container (in this case, the RAIDset)
must be initialized before a unit may be created from it. If the container’s
metadata cannot be found, or is incorrect, an error will be displayed and the
unit will not be created.
CLI> INITIALIZE R3 CHUNKSIZE= n
Where n is the chunk size in blocks. The default chunk size is 128 blocks.
or
CLI> INITIALIZE R3 CHUNKSIZE=DEFAULT
Where the controller determines the chunk size.
6–10 Working with RAID Arrays