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Re: [linux-lvm] Bad disk?



On 11/10/2010 01:58 PM, Ray Morris wrote:
On 11/10/2010 11:56:24 AM, Mauricio Tavares wrote:

How can I find which drive /dev/dm-0 is?

Try:
cat /sys/block/dm-0/dm/name

On my system, I created dm2device so I can tell which snapshot is
full or whatever device has a problem:

# cat /usr/local/bin/dm2device
#!/bin/sh

cat /sys/block/$1/dm/name

	Thanks!

cat /sys/block/dm-0/dm/name returned export-vms, which is /dev/sdc1.

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Ray Morris
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On 11/10/2010 11:56:24 AM, Mauricio Tavares wrote:
On 11/10/2010 10:11 AM, Phillip Susi wrote:
On 11/10/2010 9:39 AM, Mauricio Tavares wrote:
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):

None of the errors you posted mention a physical disk at all, so there
isn't anything wrong with them. To find out what dm-0 is you need to
poke around with dmsetup.

Now that might be interesting since I honestly do not know how to use
it (and my google-fu seems weak today). But this is a bit more info I
found:

raub strangepork:~$ sudo pvs -a
/dev/dm-0: read failed after 0 of 4096 at 0: Input/output error
/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
PV VG Fmt Attr PSize PFree
/dev/dm-0 -- 0 0
/dev/dm-1 root lvm2 a- 277.05g 192.55g
/dev/dm-2 -- 0 0
/dev/dm-3 -- 0 0
/dev/dm-4 -- 0 0
/dev/dm-5 -- 0 0
/dev/ram0 -- 0 0
/dev/ram1 -- 0 0
/dev/ram10 -- 0 0
/dev/ram11 -- 0 0
/dev/ram12 -- 0 0
/dev/ram13 -- 0 0
/dev/ram14 -- 0 0
/dev/ram15 -- 0 0
/dev/ram2 -- 0 0
/dev/ram3 -- 0 0
/dev/ram4 -- 0 0
/dev/ram5 -- 0 0
/dev/ram6 -- 0 0
/dev/ram7 -- 0 0
/dev/ram8 -- 0 0
/dev/ram9 -- 0 0
/dev/root -- 0 0
/dev/sda1 -- 0 0
/dev/sda3 -- 0 0
/dev/sdc1 export lvm2 a- 465.76g 65.76g
raub strangepork:~$

FYI, the root vg in inside /dev/sda3, which is an encrypted partition.
How can I find which drive /dev/dm-0 is?

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