User`s guide

Chapter 6. Configuring Your Array
EK–SWRA2–IG. C01 6–15
Now, go on to Section 6.4 to configure the array.
6.4 Configuring the Array
When you configure your array, you allocate your disk drive resources into drive
groups and hot spares. You then create logical RAID drives, which allow your
computer to view the combined disk space of each of the disk drives in the group
as a single drive. You determine how you want to store data on a logical RAID
drive by selecting a RAID level (RAID 0, 1, 0+1, 5, or Just a Bunch of Disks
(JBOD)) when you create it.
6.4.1 Planning How to Recover from A Disk Failure
One of the major benefits of RAID is the ability to maintain data availability
even in the event of a disk failure. RAID configurations utilizing redundant
RAID levels (RAID 1, RAID 0 + 1, and RAID 5) can sustain the failure of one
disk at any given time. Your RAID Array 200 Series Subsystem recovers from
the failure of a disk by rebuilding the failed disk's data on a replacement disk.
The RAID subsystem can achieve this through any one of the following methods:
• Hot Spare
• Hot Swap
• Manually rebuilding
Read the following descriptions of the methods of recovering from a disk failure
to help you decide whether to create a hot spare drive when you configure your
array.
NOTE
You cannot recover data from a drive that fails in
a configuration with a non-redundant RAID level
(RAID 0, JBOD) using tools provided with your
RAID Array 200 Series Subsystem.