I am doing some RAID scenarios on a single disc (testing purposes) on
RHEL4. I have some partitions as follows:
/dev/hda5 100M
/dev/hda6 200M
/dev/hda7 200M
/dev/hda8 200M
/dev/hda9 200M
I create a RAID 5 set with /dev/hda{5,6,7,8}. I fail/remove /dev/hda5
and add /dev/hda9, at which point I can grow the RAID. Running:
mdadm -G /dev/md0 -z max
will increase the RAID size, however, it sets off a infinite resync. I
have tested with mdadm-1.6.0-2, and with mdadm-1.12.0-1 rebuilt from the
source rpm.
Here is a snippet of the messages:
Jul 13 09:33:36 station8 kernel: md: syncing RAID array md0
Jul 13 09:33:36 station8 kernel: md: minimum _guaranteed_ reconstruction
speed: 1000 KB/sec/disc.
Jul 13 09:33:36 station8 kernel: md: using maximum available idle IO
bandwith (but not more than 200000 KB/sec) for reconstruction.
Jul 13 09:33:36 station8 kernel: md: using 128k window, over a total of
104320 blocks.
Jul 13 09:33:36 station8 kernel: md: resuming recovery of md0 from
checkpoint.
Jul 13 09:33:36 station8 kernel: md: md0: sync done.
Jul 13 09:33:36 station8 kernel: RAID5 conf printout:
Jul 13 09:33:36 station8 kernel: --- rd:4 wd:4 fd:0
Jul 13 09:33:36 station8 kernel: disk 0, o:1, dev:hda6
Jul 13 09:33:36 station8 kernel: disk 1, o:1, dev:hda7
Jul 13 09:33:36 station8 kernel: disk 2, o:1, dev:hda8
Jul 13 09:33:36 station8 kernel: disk 3, o:1, dev:hda9
which print out many times per second. I have to reboot the system to
get it to stop filling /var/log/messages. Once it reboots, and syncs, I
don't get any problems with it. Any idea where the problem might be?
Thanks,
Forrest
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