On Tue, Nov 09, 2021 at 02:56:59PM -0500, Hendrik Boom via Dng wrote: > I upgraded my server to beowulf. > > After rebooting, all home directories except root's are no longer > accessible. > > They are all on an LVM on software RAID. > > The problem seems to be that two of my three RAID1 systems are not > starting up properly. What can I do about it? >
After following suggestions from the replies I got here, I determined that one of my three physical disk drives was not being reognised by the operating system. Took the cover off the machine. Looked in with a penlight and tured the machine off. Wiggled and pushed on some SATA cables and power-supply cables. Rebooted. All three drives came up properly. The RAIDs assembled properly. All except /dev/md0. It's a defective RAID necause the disk drive containing its second copy died a long time ago. I should move its data off it onto one of the other RAIDs sometime. Now there remains the question: Why didn't /dev/md1 and /dev/md2 assemble properly as defective RAID1s when their second copies were gone? Isn't that the whole point of a RAID1? /dev/md0 had no such problem. -- hendrik > > > hendrik@april:/$ cat /proc/mdstat > Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] > [raid4] [raid10] > md1 : inactive sda2[3](S) > 2391296000 blocks super 1.2 > > md2 : inactive sda3[0](S) > 1048512 blocks > > md0 : active raid1 sdf4[1] > 706337792 blocks [2/1] [_U] > > unused devices: <none> > hendrik@april:/$ > > > > hendrik@april:/$ cat /etc/mdadm/mdadm.conf > DEVICE partitions > ARRAY /dev/md0 level=raid1 num-devices=2 > UUID=4dc189ba:e7a12d38:e6262cdf:db1beda2 > ARRAY /dev/md1 metadata=1.2 name=april:1 > UUID=c328565c:16dce536:f16da6e2:db603645 > ARRAY /dev/md2 UUID=5d63f486:183fd2ea:c2a3a88f:cb2b61de > MAILADDR root > hendrik@april:/$ > > > > The standard recommendation seems to be to replace lines > in /etc/mdadm/mdadm.conf by lines prouced by mdadm --examine --scan: > > > > april:~# mdadm --examine --scan > ARRAY /dev/md/1 metadata=1.2 UUID=c328565c:16dce536:f16da6e2:db603645 > name=april:1 > ARRAY /dev/md2 UUID=5d63f486:183fd2ea:c2a3a88f:cb2b61de > ARRAY /dev/md0 UUID=4dc189ba:e7a12d38:e6262cdf:db1beda2 > april:~# > > > > But this replacement involves changing a line that dies work (md0), > not changing one that did not (md2), > and changing another one that did not work (md1). > > Since --examine's suggested changes seem uncorrelated > with the active/inactive record, I have little faith in > this alleged fix without first gaining more understanding. > > -- hendrik > _______________________________________________ > Dng mailing list > [email protected] > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng _______________________________________________ Dng mailing list [email protected] https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
