Mike wrote: > -----Ursprüngliche Nachricht----- > Von: Mike Snitzer [mailto:snitzer@redhat.com] > Gesendet: Dienstag, 14. Oktober 2014 23:07 > An: Lentes, Bernd > Cc: LVM general discussion and development > Betreff: Re: kernel errors from a merging snapshot > > On Tue, Oct 14 2014 at 2:08pm -0400, > Lentes, Bernd <bernd.lentes@helmholtz-muenchen.de> wrote: > > > Hi, > > > > i have a /-filesystem residing on a lv. I also had a snapshot of that lv > because I tried some software. After testing the software I merged the > snapshot into the origin, by rebooting. It seemed to went fine. > > Btw: how do I know when merging is finished ? Where can I see results > from the merging ? > > You can use lvm to see the merge in progress (via lvs). Or you can have a > look at the "How to determine when a merging is complete" section of the > kernel's Documentation/device-mapper/snapshot.txt > > > But in /var/log/messages I have error messages about a block device: > > > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580247] Buffer I/O error on device > dm-3, logical block 0 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580254] Buffer I/O error on device > dm-3, logical block 1 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580258] Buffer I/O error on device > dm-3, logical block 2 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580261] Buffer I/O error on device > dm-3, logical block 3 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580264] Buffer I/O error on device > dm-3, logical block 0 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580271] Buffer I/O error on device > dm-3, logical block 9961471 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580274] Buffer I/O error on device > dm-3, logical block 9961471 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580341] Buffer I/O error on device > dm-3, logical block 0 > > Oct 14 16:22:45 vm59093-4 kernel: [ 7.580345] Buffer I/O error on device > dm-3, logical block 1 > > > > Dm-3 is the snapshot I merged (although I named it root-snapshot while > creating, not root--snapshot !): > > > > Dmsetup info says: > > > > ... > > Name: vg_1-root--snapshot > > State: ACTIVE > > Read Ahead: 1024 > > Tables present: LIVE > > Open count: 0 > > Event number: 0 > > Major, minor: 252, 3 > > Number of targets: 1 > > UUID: > > LVM- > ZfsXYr9bkOt1d9bMNpcrn7MxH2aX6H0bhELCnywHd7rbddry6f63xtkk1vqs1hv > v > > ... > > > > The errors appeared during the reboot. Is that normal ? > > We replace the device that is being merged with the "error" target. So any > IO directly to the merging device will get errored out. But IIRC that was fixed > with an updated lvm2 (libdm) change to hide the device from udev (udev > rules were trying to read labels from the device via blkid, etc). > > Which distro and kernel are you using? SLES 11 SP3 64bit, kernel 3.0.76-0.11-default Bernd Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH) Ingolstädter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe Geschäftsführer: Prof. Dr. Günther Wess, Dr. Nikolaus Blum, Dr. Alfons Enhsen Registergericht: Amtsgericht München HRB 6466 USt-IdNr: DE 129521671 _______________________________________________ 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/
