Yesterday I added a hard drive (to put extra stuff on it) to my ubuntu
10.10 box and created a LVM in it. Then copied some files to it and
restarted the machine to see if it would mount into the right
mountpoint. It didn't. So I decided to see if it was there (vg in
question is export):
raub@strangepork:~$ sudo vgscan
Reading all physical volumes. This may take a while...
/dev/dm-0: read failed after 0 of 4096 at 429496664064: Input/output
error
/dev/dm-0: read failed after 0 of 4096 at 429496721408: Input/output
error
/dev/dm-0: read failed after 0 of 4096 at 0: Input/output error
/dev/dm-0: read failed after 0 of 4096 at 4096: Input/output error
/dev/dm-0: read failed after 0 of 4096 at 0: Input/output error
Found volume group "export" using metadata type lvm2
Found volume group "root" using metadata type lvm2
raub@strangepork:~$
Those dm-0 messages do not make me happy. dmesg and vgchange make me
think the problem is on the new drive:
[ 268.024593] scsi 0:0:0:0: Direct-Access ATA ST3500320NS
SN04 PQ: 0 ANSI: 5
[ 268.024900] sd 0:0:0:0: [sdc] 976773168 512-byte logical blocks: (500
GB/465 GiB)
[ 268.024918] sd 0:0:0:0: Attached scsi generic sg2 type 0
[ 268.024996] sd 0:0:0:0: [sdc] Write Protect is off
[ 268.025003] sd 0:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 268.025046] sd 0:0:0:0: [sdc] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
[ 268.025377] sdc: sdc1
[ 268.049853] sd 0:0:0:0: [sdc] Attached SCSI disk
[ 335.467482] quiet_error: 3 callbacks suppressed
[ 335.467492] Buffer I/O error on device dm-0, logical block 104857584
[ 335.467540] Buffer I/O error on device dm-0, logical block 104857584
[ 335.467589] Buffer I/O error on device dm-0, logical block 104857598
[ 335.467615] Buffer I/O error on device dm-0, logical block 104857598
[ 335.467647] Buffer I/O error on device dm-0, logical block 0
[ 335.467671] Buffer I/O error on device dm-0, logical block 0
[ 335.467703] Buffer I/O error on device dm-0, logical block 1
[ 335.467734] Buffer I/O error on device dm-0, logical block 104857599
[ 335.467762] Buffer I/O error on device dm-0, logical block 104857599
[ 335.467788] Buffer I/O error on device dm-0, logical block 104857599
raub@strangepork:~$ sudo vgchange -a y
/dev/dm-0: read failed after 0 of 4096 at 0: Input/output error
1 logical volume(s) in volume group "export" now active
4 logical volume(s) in volume group "root" now active
raub@strangepork:~$
Glancing through http://readlist.com/lists/centos.org/centos/1/5704.html
I wondered if I had the wrong file system descriptor:
raub@strangepork:~$ sudo sfdisk -l /dev/sdc
Disk /dev/sdc: 60801 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdc1 0+ 60800 60801- 488384001 8e Linux LVM
/dev/sdc2 0 - 0 0 0 Empty
/dev/sdc3 0 - 0 0 0 Empty
/dev/sdc4 0 - 0 0 0 Empty
raub@strangepork:~$
I guess that rules that out. Does that mean the disk is bad? If so, is
there a way to retrieve the data I put in it?
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