Hi!
You could setup a cron job that will pause the resync by writing to sysfs:
If your array if "md0":
echo "idle" > /sys/block/md0/md/sync_action
However, this is probably not necessary as the resynced stripes will be
marked in the bitmap, meaning that if your rebuild fails, re-assembling
the array should restart the resync from where it stopped.
Regards,
Ben.
On 12/11/12 12:44, Salatiel Filho wrote:
Hi guys, i have an external USB enclosure with 4 disks in RAID5 mode
using mdadm. I dont know exactly why but if i use this disks for
massive I/O for lots of hours (over 12 hours), linux usually eject
some or all disks (causing a faulty in the raid) and remaps them: sdb
-> sdf , sdc -> sdg , sdd -> sdh , sde -> sdi
Well , this was never exactly a problem because most of the time those
disks are idle (just backup), but i had a real disk failure and i will
replace the disk. But probably the rebuild process will take a lot
more than 12 hours so the chances are that some disk will be ejected
and i will be in a trouble situation where a raid5 rebuilding process
will probably be stopped by an apparently failure. So my question is:
If i get into that situation , will i be able to disassemble and
reassemble the disk using the three disks i know are 'fine' and
restart the rebuild process from where it stopped ? I have internal
bitmap enabled.
Is it possible to somehow freeze the rebuild process ? So i could
pause the process for a few hours after 8 hours of work for example.
The raid will be assembled but umounted during the rebuild proccess.
I am using kernel 3.2.30.
Thanks !!!
[]'s
Salatiel
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