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Re: [linux-lvm] Bad disk?



On 11/10/2010 12:41 PM, Stuart D. Gathman wrote:
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.

	Sorry for that: I did not think it would be there. But, as you said, it is:

lrwxrwxrwx 1 root root      7 2010-11-10 09:30 export-vms -> ../dm-0

the export vg is in /dev/sdc1.

[  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".

Let me put this way, I thought I did. I mean, after creating the partition, setting it to LVM (8e), then running

pvcreate /dev/sdc1
vgcreate export /dev/sdc1
lvcreate -L 400G --name vms export

I used mkfs.ext4 to create partition (on /dev/mapper/export-vms) and off I went. Do you think I missed a step?


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