Thank you Daniel for you more comments. Now I can remove the damaged zfs brick after rebooting the system. But then what can I do to rejoin a new brick? I can't run gluster volume replace-brick because the old brick is gone. I can't even remove the old brick because the gluster's replicate count is 2. So what is the right procedure to replace a failed brick for replicate gluster volume? Liang On Thu, Jan 10, 2013 at 11:57 AM, Daniel Taylor <dtaylor at vocalabs.com>wrote: > I'm not familiar with zfs in particular, but it should have given you a > message saying why it won't unmount. > > In the worst case you can indeed remove the mount point from /etc/fstab > and reboot. A hard reboot may be necessary in a case like this. > > > On 01/10/2013 10:43 AM, Liang Ma wrote: > >> >> Yes, I stopped the glusterfs service on the damaged system but zfs still >> won't allow me to umount the filesystem. Maybe I should try to shutdown the >> entire system. >> >> >> On Wed, Jan 9, 2013 at 10:28 AM, Daniel Taylor <dtaylor at vocalabs.com<mailto: >> dtaylor at vocalabs.com>> wrote: >> >> >> On 01/09/2013 08:31 AM, Liang Ma wrote: >> >> >> Hi Daniel, >> >> Ok, if gluster can't self-heal from this situation, I hope at >> least I can manually restore the volume by using the good >> brick available. So would you please tell me how can I "simply >> rebuild the filesystem and let gluster attempt to restore it >> from a *clean* filesystem"? >> >> >> Trimmed for space. >> >> You could do as Tom Pfaff suggests, but given the odds of data >> corruption carrying forward I'd do the following: >> Shut down gluster on the damaged system. >> Unmount the damaged filesystem. >> Reformat the damaged filesystem as new (throwing away any >> potential corruption that might not get caught on rebuild) >> Mount the new filesystem at the original mount point >> Restart gluster >> >> In the event of corruption due to hardware failure you'd be doing >> this on replacement hardware. >> The key is you have to have a functional filesystem for gluster to >> work with. >> >> >> -- Daniel Taylor VP Operations Vocal >> Laboratories, Inc >> dtaylor at vocalabs.com <mailto:dtaylor at vocalabs.com> 612-235-5711 >> <tel:612-235-5711> >> >> ______________________________**_________________ >> Gluster-users mailing list >> Gluster-users at gluster.org <mailto:Gluster-users at gluster.**org<Gluster-users at gluster.org> >> > >> http://supercolony.gluster.**org/mailman/listinfo/gluster-**users<http://supercolony.gluster.org/mailman/listinfo/gluster-users> >> >> >> > -- > Daniel Taylor VP Operations Vocal Laboratories, Inc > dtaylor at vocalabs.com 612-235-5711 > > ______________________________**_________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://supercolony.gluster.**org/mailman/listinfo/gluster-**users<http://supercolony.gluster.org/mailman/listinfo/gluster-users> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20130110/90945d4b/attachment-0001.html>
