On 20/07/2014 10:45, TM wrote:
Hi,
I have a raid10 with 4x 3TB disks on a microserver
http://n40l.wikia.com/wiki/Base_Hardware_N54L , 8Gb RAM
Recently one disk started to fail (smart errors), so I replaced it
Mounted as degraded, added new disk, removed old
Started yesterday
I am monitoring /var/log/messages and it seems it will take a long time
Started at about 8010631739392
And 20 hours later I am at 6910631739392
btrfs: relocating block group 6910631739392 flags 65
At this rate it will take a week to complete the raid rebuild!!!
Furthermore it seems that the operation is getting slower and slower
When the rebuild started I had a new message every half a minute, now it’s
getting to OneAndHalf minutes
Most files are small files like flac/jpeg
Hi TM, are you doing other significant filesystem activity during this
rebuild, especially random accesses?
This can reduce performances a lot on HDDs.
E.g. if you were doing strenous multithreaded random writes in the
meanwhile, I could expect even less than 5MB/sec overall...
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