Rebuilding A Raid 5 Disk Array; Figure 13. Degraded Raid 1 Array Drive When Not In Use; Figure 14. Degraded Raid 10 Array Drive When Not In Use - 3Ware Escalade 7000 Series Installation Manual

3ware Escalade ATA RAID Controller Installation Guide
array is removed, unplugged or fails on read or write requests, the
array is marked as DEGRADED and the drive is marked as Not In
Use or is not displayed if no longer available. (see Figure 13 and
Figure 14).
You can still read and write data from a degraded disk array, but the
array will not be fault tolerant until it is rebuilt using the Rebuild
feature, described in the 3ware Disk Array Configuration Utility or
3DM Disk Management Utility chapters.
3 w a r e D i s k A r r a y C o n f i g u r a t i o n
Available Drives:
Port 2 - QUANTUM FIREBALLP LM30
Port 3 - QUANTUM FIREBALLP LM30
Disk Arrays:
Array Unit 0 - 2 drive Mirror
Port 0 - QUANTUM FIREBALLP LM30
Port 1 - QUANTUM FIREBALLP LM30
Create Array Delete Array
$ Toggle Hot Spare
Alt-F1 Help Previous/Next
Cancel
F6 Restore Initial Values Esc

Figure 13. Degraded RAID 1 Array Drive When Not in Use

38
30.0GB
30.0GB
30.0GB DEGRADED
30.0GB Not in Use
30.0GB
Maintain Array Rebuild Array
Enter
Select/Deselect
F8
Done
www.3ware.com
3 w a r e D i s k A r r a y C o n f i g u r a t i o n
Available Drives:
Disk Arrays:
Array Unit 0 - 4 drive 64K RAID 10
Port 0 - QUANTUM FIREBALLP LM30
Port 1 - QUANTUM FIREBALLP LM30
Port 2 - QUANTUM FIREBALLP LM30
Port 3 - QUANTUM FIREBALLP LM30
Create Array Delete Array
$ Toggle Hot Spare
Alt-F1 Help Previous/Next
Cancel
F6 Restore Initial Values Esc

Figure 14. Degraded RAID 10 Array Drive When Not in Use

Note:
A RAID 10 array can be configured with either
four, six, eight, ten or twelve drives. In a 4-drive config-
uration, up to two drives can be rebuilt. In a 6-drive con-
figuration, up to three drives can be rebuilt. In an 8-drive
configuration, up to four drives can be rebuilt. In a 12-
drive configuration, up to six drives can be rebuilt.

Rebuilding a RAID 5 disk array

Escalade ATA RAID Controllers allow you to create fault tolerant
RAID 5 disk arrays. These disk arrays achieve fault tolerance by
using a simple (exclusive OR) function to generate the parity data
www.3ware.com
3ware Disk Array Configuration Utility
60.0GB DEGRADED
30.0GB Not in Use
30.0GB
30.0GB
30.0GB
Maintain Array
Rebuild Array
Enter
Select/Deselect
F8
Done
39