Jussi Kansanen posted on Thu, 21 Apr 2016 18:09:31 +0300 as excerpted:
> The replace operation is super slow (no other load) with avg. 3x20MB/s
> (old disks) reads and 1.4MB/s write (new disk) with CFQ scheduler. Using
> deadline schd. the performance is better with avg. 3x40MB/s reads and
> 4MB/s
Hello,
I have a 4x 2TB HDD raid5 array and one of the disks started going bad
(according to smart no read/write errors seen by btrfs), after replacing the
disk with a new one I ran "btrfs replace" which resulted in kernel crash about
0.5% done:
BTRFS info (device dm-10): dev_replace from (devid
