Hi Song On 21.06.19 21:51, Mathias G wrote: >> Question: are you running the two drives with write cache on? >> If yes, and if your application is not heavy on writes, could you try >> turn off HDD write cache and see if the issue repros? > Thanks for this. I just disabled the write cache with hdparm in rc.local > for both RAID members and will let you know if the problem occurs again. Today the problem occurred again: kern.log > Jun 28 12:39:11 $hostname kernel: [ 2.098096] md/raid1:md0: not clean -- starting background reconstruction > Jun 28 12:39:11 $hostname kernel: [ 2.098099] md/raid1:md0: active with 2 out of 2 mirrors > Jun 28 12:39:11 $hostname kernel: [ 2.098201] md0: bitmap file is out of date (236662 < 236663) -- forcing full recovery > Jun 28 12:39:11 $hostname kernel: [ 2.098252] md0: bitmap file is out of date, doing full recovery And the write cache is disabled for both RAID members: > # hdparm -i /dev/sdb |grep WriteCache > AdvancedPM=yes: disabled (255) WriteCache=disabled > # hdparm -i /dev/sdc |grep WriteCache > AdvancedPM=no WriteCache=disabled I'm a little at a loss.. -- kind regards mathias
