[CentOS] Looking for a life-save LVM Guru

[Khemara Lyn]

Dear James,

Thank you for being quick to help.
Yes, I could see all of them:

# vgs
# lvs
# pvs

Regards,
Khem

On Sat, February 28, 2015 7:37 am, James A. Peltier wrote:
>

>
> ----- Original Message -----
> | Dear All,
> |
> | I am in desperate need for LVM data rescue for my server.
> | I have an VG call vg_hosting consisting of 4 PVs each contained in a
> | separate hard drive (/dev/sda1, /dev/sdb1, /dev/sdc1, and /dev/sdd1).
> | And this LV: lv_home was created to use all the space of the 4 PVs.
> |
> | Right now, the third hard drive is damaged; and therefore the third PV
> | (/dev/sdc1) cannot be accessed anymore. I would like to recover whatever
>  | left in the other 3 PVs (/dev/sda1, /dev/sdb1, and /dev/sdd1).
> |
> | I have tried with the following:
> |
> | 1. Removing the broken PV:
> |
> | # vgreduce --force vg_hosting /dev/sdc1
> |   Physical volume "/dev/sdc1" still in use
> |
> | # pvmove /dev/sdc1
> |   No extents available for allocation
>
>
> This would indicate that you don't have sufficient extents to move the
> data off of this disk.  If you have another disk then you could try
> adding it to the VG and then moving the extents.
>
> | 2. Replacing the broken PV:
> |
> | I was able to create a new PV and restore the VG Config/meta data:
> |
> | # pvcreate --restorefile ... --uuid ... /dev/sdc1
> | # vgcfgrestore --file ... vg_hosting
> |
> | However, vgchange would give this error:
> |
> | # vgchange -a y
> | 	  device-mapper: resume ioctl on  failed: Invalid argument
> | 	  Unable to resume vg_hosting-lv_home (253:4)
> | 	  0 logical volume(s) in volume group "vg_hosting" now active
>
>
> There should be no need to create a PV and then restore the VG unless the
> entire VG is damaged.  The configuration should still be available on the
> other disks and adding the new PV and moving the extents should be
> enough.
>
> | Could someone help me please???
> | I'm in dire need for help to save the data, at least some of it if
> possible.
>
> Can you not see the PV/VG/LV at all?
>
>
> --
> James A. Peltier
> IT Services - Research Computing Group
> Simon Fraser University - Burnaby Campus
> Phone   : 778-782-6573
> Fax     : 778-782-3045
> E-Mail  : jpeltier at sfu.ca
> Website : http://www.sfu.ca/itservices
> Twitter : @sfu_rcg
> Powering Engagement Through Technology
> "Build upon strengths and weaknesses will generally take care of
> themselves" - Joyce C. Lock
>
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