This just barely started occurring and I feel like this is not a bug but a configuration error (hopefully). I'm on 12.04, 64-bit and have been happily stable for many months. My RAID1 is years old and has also had no issues until recently. The disks are healthy. As of today, though, every time I try to copy files over to the RAID the journaling daemon goes bonkers and uses 99% of the disk IO, forcing my file transfer speed to pathetic amounts (usually 1 MB/s).
I've tried restarting to no effect (I haven't changed any settings anywhere to my knowledge. Attached is a screenshot of iotop demonstrating the usage:
When not copying it goes back down to 0 percent.
Here is my /etc/fstab:
# / was on /dev/sdh2 during installation UUID=15bb606e-54af-4fa3-8341-12824a404dae / ext4 errors=remount-ro 0 1 # /home was on /dev/sdh3 during installation UUID=9eed87ee-f9d5-47c7-91e5-b82696142f7e /home ext4 defaults 0 2 # swap was on /dev/sdh4 during installation UUID=27f06259-705d-48ba-83d6-3e1837a87198 none swap sw 0 0 # Music RAID UUID=d10e627b-6068-4734-9111-5e2f71dbbe4f /media/Music_Library ext4 auto,user,sync 0 1
output of /proc/mdstat:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md127 : active raid1 sdb1 sdh1 292968181 blocks super 1.2 [2/2] [UU] unused devices: <none>
/dev/md127p1 276G 112G 150G 43% /media/Music_Library
Please advise, and thank you :)