Novell LINUX ENTERPRISE SERVER 10 SP2 - STORAGE ADMINISTRATION GUIDE 05-15-2009 Administration Manual page 92

Replace mdx with the RAID device number.
Example 1: A Disk Fails
In the following example, only four of the five devices in the RAID are active (
Total Devices : 4
to 5 and are ordered according to their alphabetic appearance in the list where they were chosen,
such as
/dev/sdg1
filenames of the other devices, you determine that the device that was removed was named
.
sdh1
Creation Time : Sun Apr 16 11:37:05 2006
Device Size : 8883840 (8.47 GiB 9.10 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Apr 17 05:50:44 2006
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Number
0
1
2
3
4
Example 2: Spare Disk Replaces the Failed Disk
In the following
Devices : 4
from the RAID (
assumed the diskname of the failed disk (
removed from the RAID) is not identified in the report. The RAID is running in degraded mode
(
State : clean, degraded, recovering
), and the process is 3% complete (
dev/sdh1
92 SLES 10 SP2: Storage Administration Guide
). When it was created, the component devices in the device were numbered 0
, ,
/dev/sdh1 /dev/sdi1
/dev/md0:
Version : 00.90.03
Raid Level : raid5
Array Size : 35535360 (33.89 GiB 36.39 GB)
State : clean, degraded
Layout : left-symmetric
Chunk Size : 128K
UUID : 2e686e87:1eb36d02:d3914df8:db197afe
Events : 0.189
Major Minor RaidDevice State
8 97 0
8 0 1
8 129 2
8 45 3
8 161 4
report, only 4 of the 5 disks are active and in good condition (
mdadm
,
Working Devices : 5
Failed Devices: 0
, , and
/dev/sdj1
active sync /dev/sdg1
removed
active sync /dev/sdi1
active sync /dev/sdj1
active sync /dev/sdk1
). The failed disk was automatically detected and removed
). The spare was activated as the replacement disk, and has
). The faulty object (the failed disk that was
/dev/sdh1
). The data is being rebuilt (
Rebuild Status : 3% complete
Raid Devices : 5
. From the pattern of
/dev/sdk1
Active
spare rebuilding /
).
,
/dev/