Re: [linux-lvm] Bad disk?

["Stuart D. Gathman" <stuart@bmsi.com>]

On Wed, 10 Nov 2010, Mauricio Tavares wrote:

> Those dm-0 messages do not make me happy. dmesg and vgchange make me think the
> problem is on the new drive:

Those dm-0 messages are probably a logical error.  For instance, a snapshot
that is full would give those errors.  You need to tell us what dm-0 is
mapped to.  Look in /dev/mapper for starters.

> [  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

This is normal for your new 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

Again, this is on dm-0, not sdc.

> 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

This is normal, not sure what is has to do with filesystem desciptors.

Tell us exactly what you mean by "put a LVM on it".  Did you run
pvcreate?  vgcreate?  lvcreate? You might find the output of "pvs"
enlightening.  That will tell us what PVs you have created.
And list /dev/mapper so we know what dm-0 is, and include the output of "lvs".

-- 
	      Stuart D. Gathman <stuart@bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.