* [linux-lvm] Missing link in /dev/<domain>?
@ 2006-08-11 17:59 Greg Freemyer
2006-08-11 18:06 ` Alasdair G Kergon
0 siblings, 1 reply; 6+ messages in thread
From: Greg Freemyer @ 2006-08-11 17:59 UTC (permalink / raw)
To: LVM general discussion and development
All,
Re: SuSE 10.1 w/ 2.6.16 enhanced kernel from the distro.
I had a non-graceful shutdown of a fileserver last night.
Today, the /dev/mapper directory seems to have an extra entry:
my-domain-config
my-domain-home
my-domain-data
my-domain-data-real
control
The unexpected entry is the -data-real one.
The -data entry seems to be corrupted because if I try to mount that I
get "no superblock". OTOH -data-real can be mounted and has my data
in it.
Another issue is in /dev/<my-domain> I only have 2 links (config and home).
If I manually create the missing data link and point it to -data-real
I can mount my data filesystem, but after a reboot the link is missing
once again.
I'm running SuSE 10.1 which has a dynamically created /dev directory,
so I have no idea where to look to get the missing link to be
recreated properly
So, I guess my first question is what's going on with -data vs
-data-real? And should fixing that cause the dynamic /dev to properly
start recreating my full set of links?
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] Missing link in /dev/<domain>?
2006-08-11 17:59 [linux-lvm] Missing link in /dev/<domain>? Greg Freemyer
@ 2006-08-11 18:06 ` Alasdair G Kergon
2006-08-11 19:38 ` Greg Freemyer
0 siblings, 1 reply; 6+ messages in thread
From: Alasdair G Kergon @ 2006-08-11 18:06 UTC (permalink / raw)
To: LVM general discussion and development
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?
See what vgmknodes does.
Post the output of dmsetup info -c and lvs -va.
Alasdair
--
agk@redhat.com
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] Missing link in /dev/<domain>?
2006-08-11 18:06 ` Alasdair G Kergon
@ 2006-08-11 19:38 ` Greg Freemyer
2006-08-11 19:53 ` Greg Freemyer
2006-08-11 21:02 ` Alasdair G Kergon
0 siblings, 2 replies; 6+ messages in thread
From: Greg Freemyer @ 2006-08-11 19:38 UTC (permalink / raw)
To: LVM general discussion and development
On 8/11/06, Alasdair G Kergon <agk@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@redhat.com
Thanks
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [linux-lvm] Missing link in /dev/<domain>?
2006-08-11 19:38 ` Greg Freemyer
@ 2006-08-11 19:53 ` Greg Freemyer
2006-08-11 21:02 ` Alasdair G Kergon
1 sibling, 0 replies; 6+ messages in thread
From: Greg Freemyer @ 2006-08-11 19:53 UTC (permalink / raw)
To: LVM general discussion and development
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@gmail.com> wrote:
> On 8/11/06, Alasdair G Kergon <agk@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@redhat.com
>
> Thanks
> Greg
> --
> Greg Freemyer
> The Norcross Group
> Forensics for the 21st Century
>
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] Missing link in /dev/<domain>?
2006-08-11 19:38 ` Greg Freemyer
2006-08-11 19:53 ` Greg Freemyer
@ 2006-08-11 21:02 ` Alasdair G Kergon
2006-08-11 21:54 ` Greg Freemyer
1 sibling, 1 reply; 6+ messages in thread
From: Alasdair G Kergon @ 2006-08-11 21:02 UTC (permalink / raw)
To: LVM general discussion and development
On Fri, Aug 11, 2006 at 03:38:56PM -0400, Greg Freemyer wrote:
> 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
> 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
It still thinks you have a snapshot, but it's failing to activate it.
If you don't need it, try lvremoving the snapshot.
Alasdair
--
agk@redhat.com
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [linux-lvm] Missing link in /dev/<domain>?
2006-08-11 21:02 ` Alasdair G Kergon
@ 2006-08-11 21:54 ` Greg Freemyer
0 siblings, 0 replies; 6+ messages in thread
From: Greg Freemyer @ 2006-08-11 21:54 UTC (permalink / raw)
To: LVM general discussion and development, Marlier, Ian
lvremove of the snapshot resolved my issue, thanks.
I'm using 2.6.16 (from SUSE) which I know is a little old.
Is the snapshot code likely to progress beyond experimental in the
vanilla kernel soon, or maybe already has?
Thanks
Greg
On 8/11/06, Alasdair G Kergon <agk@redhat.com> wrote:
> On Fri, Aug 11, 2006 at 03:38:56PM -0400, Greg Freemyer wrote:
> > 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
>
> > 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
>
> It still thinks you have a snapshot, but it's failing to activate it.
> If you don't need it, try lvremoving the snapshot.
>
> Alasdair
> --
> agk@redhat.com
>
> _______________________________________________
> 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/
>
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
^ permalink raw reply [flat|nested] 6+ messages in thread
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2006-08-11 17:59 [linux-lvm] Missing link in /dev/<domain>? Greg Freemyer
2006-08-11 18:06 ` Alasdair G Kergon
2006-08-11 19:38 ` Greg Freemyer
2006-08-11 19:53 ` Greg Freemyer
2006-08-11 21:02 ` Alasdair G Kergon
2006-08-11 21:54 ` Greg Freemyer
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