Setup Guide

PS Series 3000 QuickStart Step 3. Set the RAID Policy
23
Group Summary – Completed Member Configuration
Using the CLI to Set the RAID Policy
To access the CLI, establish a telnet or SSH connection to the group IP address or
use a serial connection to the array, as described in Step 1-F on page 15. When
prompted, log in to the group by entering the
grpadmin account name and the
password that you specified when creating the group.
To set the RAID policy for a member, use the following command format:
member select member_name raid-policy raid_policy
The raid_policy variable can be one of the following:
•
RAID-10 — Striping on top of multiple RAID 1 (mirrored) sets, with one or
two spare disks. RAID-10 provides good performance for random writes, in
addition to the highest availability. However, since the disks are mirrored,
RAID 10 provides the least capacity.
•
RAID-50 — Striping on top of two RAID 5 (distributed-parity) sets, with
one or two spare disks. RAID-50 provides a good balance of performance
(especially for sequential writes), availability, and capacity.
•
RAID-5 — One RAID 5 set, with one spare disk. RAID-5 is similar to
RAID-50, with more capacity (two additional disks) but lower availability
and performance.