Re: [linux-lvm] Bad disk?

[Mauricio Tavares <raubvogel@gmail.com>]

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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>
> 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?
>>
>> _______________________________________________
>> linux-lvm mailing list
>> linux-lvm@redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-lvm
>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>>
>
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