Setup Guide

PS Series 3000 QuickStart Step 3. Set the RAID Policy
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Click Next to continue. The Configure Member – RAID Set Configuration dialog
box appears.
Configure Member – RAID Set Configuration (RAID-50)
Specify the RAID policy by selecting one of the buttons under RAID policy:
•
RAID-10 — Striping on top of multiple RAID 1 (mirrored) sets, with 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 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.
The values in the dialog box table reflect the pool capacity, based on the selected
RAID policy. In the preceding dialog box, selecting RAID-50 yields an estimated
member capacity of 3.14 TB. Selecting RAID-10 yields an estimated member
capacity of 1.83 TB, as shown in the following dialog box.