Specifications

Managing and Repairing RAIDs
Chapter 4 Storage Configuration and Management 65
Tip
If you configure a RAID 1 or 5 with a hot spare, the array automatically starts
rebuilding with the hot spare when one of the disk drives fails or is removed.
To Replace a Disk Drive
The following procedure assumes that you are installing a new, out-of-the-box disk
drive as a replacement for a failed drive.
1
Remove a disk drive logically from an existing RAID using the Administration
Tool.
Navigate to the
Storage > RAID Sets
screen. Click the name of the RAID that
contains the failed drive to view the RAID’s Edit screen. In the Actions column,
click the failed drive’s
Remove
link. On the confirmation screen, click
Continue
.
You return to the RAID’s Edit screen. The RAID status now reads Degraded.
2
Physically remove the failed disk drive, and insert a new one in its place.
See page 70 for detailed instructions on physically replacing a disk drive. After
the drive is removed, navigate to the
Storage > Devices
screen. The status of the
new drive now reads Unassigned.
3
Add the disk drive logically to a degraded RAID using the Administration
Tool.
Navigate to the
Storage > RAID Sets
screen and click the name of the degraded
RAID. On the RAID’s edit screen, click
Repair
to view a list of available drives.
Select a drive from the list, and click
Continue
. On the confirmation screen, click
Continue
. You return to the RAID’s Edit screen. The status of the RAID now reads
Resyncing, and the status of the newly added drive shows as Hot Spare.
Adding Disk Drives to a RAID
This section describes how to safely add drives to an existing RAID 1 or 5. On Snap
Servers, after a fresh drive is inserted into a drive bay, you must use the
Administration Tool to add it to a RAID.
How RAIDs React to Disk Drive Additions
• RAID 0 (nonredundant) —
You cannot add a drive to a RAID 0. To reconfigure a
RAID 0, you must delete the RAID and recreate it.
• RAID 1 (redundant) —
You can add a new drive to a RAID 1 as either a hot spare
or as a new member. Adding a disk drive to a RAID 1 does not add storage
capacity. The new drive simply creates an additional copy of the original drive.
• RAID 5 (redundant) —
You can only add a hot spare to a RAID 5; you cannot add
a new drive as a new member to an existing RAID 5.