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RAID Scrub broken in 6.9.2?
Is anyone else having issues with RAID scrub seeming to go much slower and seemingly quit part of the way through with 6.9.2? 4-drive RAID5 here. I've started two scrubs now, they go even slower than...
The scrub happily finished this time. Go figure.
The GUI-initiated scrub performs both an mdadm (the software RAID) re-sync and a btrfs (the file system) scrub. The GUI shows thes both as a "scrub". Use cat /proc/mdstat to see if one of the volumes is still re-syncing or stuck trying to do so.
This is not new in 6.9.2, BTW.
It would be worth checking smart_history.log for recent changes in key SMART values.
All seems well with the disks (the RAID5 in question is the top 4 disks):
time model serial realloc_sect realloc_evnt spin_retry_cnt ioedc cmd_timeouts pending_sect uncorrectable_err ata_errors ------------------- -------------------- -------------------- ------------ ------------ -------------- ---------- ------------ ------------ ----------------- ---------- 2015-04-06 13:22:06 WDC WD4000F9YZ-09N20 [serialscrubbed] 0 0 0 -1 -1 0 0 0 2015-04-06 13:22:06 WDC WD4000F9YZ-09N20 [serialscrubbed] 0 0 0 -1 -1 0 0 0 2015-04-06 13:22:06 WDC WD4000F9YZ-09N20 [serialscrubbed] 0 0 0 -1 -1 0 0 0 2015-04-06 13:22:06 WDC WD4000F9YZ-09N20 [serialscrubbed] 0 0 0 -1 -1 0 0 0 2017-06-19 14:01:04 WDC WD40EFRX-68N32N0 [serialscrubbed] 0 0 0 -1 -1 0 0 0 2017-06-19 14:01:04 WDC WD40EFRX-68N32N0 [serialscrubbed] 0 0 0 -1 -1 0 0 0
The resync is 95% through. I'll let you all know if it mysteriously disappears again.
The scrub happily finished this time. Go figure.
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