Hi Gandalf and Sage, Just would like to confirm if my steps below to replace a journal disk are correct? Presuming the journal disk to be replaced is /dev/sdg and the two affected OSDs using the disk as journals are osd.30 and osd.31:
- ceph osd set noout - stop affected OSDs sudo stop ceph-osd id=30 sudo stop ceph-osd id=31 - flush the journal for the affected OSDs ceph-osd -i 30 --flush-journal ceph-osd -i 31 --flush-journal - dump journal partition scheme sgdisk --backup=/tmp/journal_table /dev/sdg - remove and replace the journal SSD (sdg) - verify new journal SSD is detected as /dev/sdg parted -l - restore the journal partition scheme sgdisk --restore-backup=/tmp/journal_table /dev/sdg - run mkjournal on the two affected osds ceph-osd -i 30 --mkjournal ceph-osd -i 31 --mkjournal - start the OSDs sudo start ceph-osd id=30 sudo start ceph-osd id=31 - ceph osd unset noout Looking forward to your reply, thank you. Cheers. On Fri, May 9, 2014 at 1:08 AM, Indra Pramana <[email protected]> wrote: > Hi Gandalf and Sage, > > Many thanks! Will try this and share the outcome. > > Cheers. > > > On Fri, May 9, 2014 at 12:55 AM, Gandalf Corvotempesta < > [email protected]> wrote: > >> 2014-05-08 18:43 GMT+02:00 Indra Pramana <[email protected]>: >> > Since we don't use ceph.conf to indicate the data and journal paths, >> how can >> > I recreate the journal partitions? >> >> 1. Dump the partition scheme: >> sgdisk --backup=/tmp/journal_table /dev/sdd >> >> 2. Replace the journal disk device >> >> 3. Restore the old partition scheme: >> sgdisk --restore-backup=/tmp/journal_table /dev/sdd >> >> 4. Run mkjournal for each affected OSDs: >> >> ceph-osd -i 1 --mkjournal >> ceph-osd -i 4 --mkjournal >> ceph-osd -i 6 --mkjournal >> >> (1, 4 and 6 are OSD id) >> > >
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