Hi,
As a result of extended power outage, the FedoraCore 17 machine with mdadm RAID went down. Bringing it up, I noticed "faulty /dev/sdf" in mdadm -detail. However mdadm -E /dev/sdf shows "State : clean". Details are shown below. When I tried to add the drive to array, resync fails (I see lots of eSATA bus resets), and I get the same message in mdadm -detail.
Questions:
1. How can a clean drive be reported faulty?
2. Is there a easy way to mark drive (/dev/sdf) as "assume-clean" and add it?
Please let me know if I should get an exact replacement drive at this stage, pull out faulty /dev/sdf, and add the new drive to array. Thanks.
Details:
#mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Thu Dec 20 13:08:56 2012
Raid Level : raid6
Array Size : 11720297472 (11177.35 GiB 12001.58 GB)
Used Dev Size : 1953382912 (1862.89 GiB 2000.26 GB)
Raid Devices : 8
Total Devices : 8
Persistence : Superblock is persistent
Update Time : Mon Mar 25 11:37:12 2013
State : clean, degraded
Active Devices : 7
Working Devices : 7
Failed Devices : 1
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : RAIDvol1
UUID : 8a9eee70:89f2639b:68f5350d:11f444fe
Events : 1494
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 96 1 active sync /dev/sdg
2 8 112 2 active sync /dev/sdh
3 8 128 3 active sync /dev/sdi
8 8 16 4 active sync /dev/sdb
5 8 32 5 active sync /dev/sdc
6 8 48 6 active sync /dev/sdd
7 8 64 7 active sync /dev/sde
9 8 80 - faulty /dev/sdf
# mdadm -E /dev/sdf
/dev/sdf:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x2
Array UUID : 8a9eee70:89f2639b:68f5350d:11f444fe
Name : RAIDvol1
Creation Time : Thu Dec 20 13:08:56 2012
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 3906767024 (1862.89 GiB 2000.26 GB)
Array Size : 11720297472 (11177.35 GiB 12001.58 GB)
Used Dev Size : 3906765824 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Recovery Offset : 0 sectors
State : clean
Device UUID : 0a58fa5c:4d10f401:07dead3a:ec844676
Update Time : Fri Mar 22 14:25:13 2013
Checksum : ba455125 - correct
Events : 1043
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAAAAA ('A' == active, '.' == missing)
#
Sundar
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