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

Greg Freemyer greg.freemyer at gmail.com
Fri Aug 11 19:53:35 UTC 2006


Alasdair,

Quick follow-up.  I said below that vgmknodes is correctly recreating
my link, but actually the symbolic link it is creating is pointing to
the non-working enty /dev/mapper/my-domain-data, not the working
-data-real entry.

Greg
On 8/11/06, Greg Freemyer <greg.freemyer at gmail.com> wrote:
> 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
>


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




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