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3ware Escalade ATA RAID Controller Installation Guide
38
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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.
Figure 13. Degraded RAID 1 Array Drive When Not in Use
Restore Initial Values
Previous/Next
Toggle Hot Spare
Cancel
Select/Deselect
Done
Alt-F1
F6
Enter
F8
$
Esc
Help
3ware Disk Array Configuration
Create Array
Delete Array
Maintain Array
Rebuild Array
Available Drives:
Port 2 - QUANTUM FIREBALLP LM30 30.0GB
Port 3 - QUANTUM FIREBALLP LM30 30.0GB
Disk Arrays:
Array Unit 0 - 2 drive Mirror 30.0GB DEGRADED
Port 0 - QUANTUM FIREBALLP LM30 30.0GB Not in Use
Port 1 - QUANTUM FIREBALLP LM30 30.0GB
3ware Disk Array Configuration Utility
www.3ware.com
39
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
3ware Disk Array Configuration
Create Array
Restore Initial Values
Previous/Next
Toggle Hot Spare
Cancel
Select/Deselect
Done
Alt-F1
F6
Enter
F8
$
Esc
Delete Array
Maintain Array
Rebuild Array
Available Drives:
Disk Arrays:
Array Unit 0 - 4 drive 64K RAID 10 60.0GB DEGRADED
Port 0 - QUANTUM FIREBALLP LM30 30.0GB Not in Use
Port 1 - QUANTUM FIREBALLP LM30 30.0GB
Port 2 - QUANTUM FIREBALLP LM30 30.0GB
Port 3 - QUANTUM FIREBALLP LM30 30.0GB
Help