On 06/07/16 10:13, o1bigtenor wrote:
Greetings
Running a Raid 10 array with 4 - 3 TB drives. Have a UPS but this area
gets significant lightning and also brownout (rural power) events.
Found the array was read only this morning. Thought that rebooting the
system might correct things - - - it did not as the array did not
load.
commands used followed by system response
mdadm --detail /dev/md0
mdadm: md device /dev/md0 does not appear to be active.
cat /proc/mdstat
md0 : inactive sdc1[5](S) sdf1[8](S) sde1[7](S) sdb1[4](S)
mdadm -E /dev/sdb1
sdc1
sde1
sdf1
everything is the same except for 2 items
sde and sdf have uptime listed from July 04 05:50:46
events 64841
array state of AAAA
sdb and sdc have uptime listed from July 05 01:57:38
events 64844
array state of AAA.
Do I just re-create the array?
No, not if you value your data. Only re-create the array if you are told
to by someone (knowledgeable) on the list.
In your case, I think you should stop the array.
mdadm --stop /dev/md0
Make sure there is nothing listed in /proc/mdstat
Then try to assemble the array, but force the events to match:
mdadm --assemble /dev/md0 --force /dev/sd[bcef]1
If that doesn't work, then include the output from dmesg as well as
/proc/mdstat and any commandline output generated.
You might also want to examine why two drives dropped, referring to logs
or similar might assist.
Regards,
Adam
--
Adam Goryachev Website Managers www.websitemanagers.com.au
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