[linux-lvm] Missing link in /dev/<domain>?

[Greg Freemyer]

On 8/11/06, Alasdair G Kergon <agk at redhat.com> wrote:
> On Fri, Aug 11, 2006 at 01:59:35PM -0400, Greg Freemyer wrote:
> > my-domain-data
> > my-domain-data-real
>
> > The unexpected entry is the -data-real one.
>
> Did you try anything with snapshots?
>
Yes, I routinely perform a snapshot everynight via cron.  No idea if a
snapshot existed when the machine went down.

> See what vgmknodes does.
>
I renamed the manually created link from data to data.tmp, then ran vgmknodes.

The data link was successfully recreated.

> Post the output of dmsetup info -c and lvs -va.
>
# dmsetup info -c
Name             Maj Min Stat Open Targ Event  UUID
TruStore--Data-data-real 253   2 L--w    1    1      0
LVM-mMDI3Wi6Av0TlwI4D905RvPDfWM3rNlBxxpvaosSsuQnSubLnpkprJIBEdn1VHiV-real
TruStore--Data-home 253   0 L--w    1    1      0
LVM-mMDI3Wi6Av0TlwI4D905RvPDfWM3rNlBHU7HFSYOTsxTwH6Pg1c4k0UQOK7O4j6X
TruStore--Data-data 253   3 ---w    0    0      0
LVM-mMDI3Wi6Av0TlwI4D905RvPDfWM3rNlBxxpvaosSsuQnSubLnpkprJIBEdn1VHiV
TruStore--Data-config 253   1 L--w    1    1      0
LVM-mMDI3Wi6Av0TlwI4D905RvPDfWM3rNlBG5XBMCNoneiIFa16MFUHMmmhPgvEF3da

# lvs -va
File descriptor 4 left open
    Finding all logical volumes
  LV        VG            #Seg Attr   LSize  Maj Min KMaj KMin Origin
Snap%  Move Copy%  Log LV UUID
  config    TruStore-Data    1 -wi-ao  1.00G  -1  -1 253  1
                      G5XBMC-None-iIFa-16MF-UHMm-mhPg-vEF3da
  data      TruStore-Data    1 owi-d- 63.00G  -1  -1 253  3
                      xxpvao-sSsu-QnSu-bLnp-kprJ-IBEd-n1VHiV
  data_snap TruStore-Data    1 swi--- 45.00G  -1  -1 -1   -1   data
                      m4ZSZG-ba0q-Fgco-sYcy-e0DJ-V3SI-Bb0r6C
  home      TruStore-Data    1 -wi-ao 10.00G  -1  -1 253  0
                      HU7HFS-YOTs-xTwH-6Pg1-c4k0-UQOK-7O4j6X

Hopefully that is not too badly word wrapped.

> Alasdair
> --
> agk at redhat.com

Thanks
Greg
-- 
Greg Freemyer
The Norcross Group
Forensics for the 21st Century