[mythtv-users] 1TB Volume running on top of RAID5 Vanished

[Mache Creeger]

Thanks for the responses.  Here are the data listings requested.

I had LVM2 overlayed on a 6 x 200GB RAID5 disk array.  As of now the 
dev/VolGroup05/LogVol05 which is linked to /opt/bigdisk seems to have 
vanished.  It seems that the 6th drive (/dev/hdi) has dissappeared 
from the RAID5 array.

Any help would be most appreciated.

-- Mache

# mdadm --detail /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Sat Apr  8 10:01:48 2006
Raid Level : raid5
Device Size : 195358208 (186.31 GiB 200.05 GB)
Raid Devices : 6
Total Devices : 5
Preferred Minor : 0
Persistence : Superblock is persistent

Update Time : Sat Oct 21 22:30:40 2006
State : active, degraded
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0

Layout : left-symmetric
Chunk Size : 256K

UUID : 0e3284f1:bf1053ea:e580013b:368be46b
Events : 0.3090999

Number   Major   Minor   RaidDevice State
0       3       65        0      active sync   /dev/hdb1
1      33        1        1      active sync   /dev/hde1
2      33       65        2      active sync   /dev/hdf1
3      34        1        3      active sync   /dev/hdg1
4      34       65        4      active sync   /dev/hdh1
0       0        0        0      removed

# more /etc/fstab
/dev/VolGroup00/LogVol00 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
/dev/VolGroup04/LogVol04 /opt                    ext3    defaults        1 2
/dev/VolGroup05/LogVol05 /opt/bigdisk            xfs     defaults        1 2
proc                    /proc                   proc    defaults        0 0
sysfs                   /sys                    sysfs   defaults        0 0
/dev/VolGroup01/LogVol01 /usr                    ext3    defaults        1 2
/dev/VolGroup02/LogVol02 /var                    ext3    defaults        1 2
/dev/VolGroup03/LogVol03 swap                    swap    defaults        0 0

# xfs_repair /dev/VolGroup05/LogVol05
/dev/VolGroup05/LogVol05: No such file or directory

fatal error -- couldn't initialize XFS library


At 01:41 PM 10/24/2006, Mache Creeger wrote:
>A 1TB volume storing 600GB of data has disappeared on my myth 
>server.  It was formatted with the XFS file system and was running 
>on top of a six disk (each disk being 200GB) 1TB RAID5 array.  On 
>boot, the volume does not exist and the RAID5 array is running with 
>5 out 6 drives.  The 6th drive is visible but not formatted.  In the 
>past, when you have 5 out 6 drives working, data integrity was 
>maintained.  In this case, however, the volume just 
>disappeared.  Any ideas on how to  recover my volume and its 600GB of data?
>
>-- Mache Creeger
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