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    Sporadic Buffer I/O error on device vda1 inside guest,RAW on LVM on top of DRBD

    Hello! I was able to reproduce this error by running "dbench -D /root -s -S -t 600 2" inside of the guest. After 387 seconds it broke. 2 1302642 28.39 MB/sec execute 382 sec latency 7.610 ms 2 1305139 28.38 MB/sec execute 383 sec latency 7.179 ms 2 1307585 28.37...
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    Sporadic Buffer I/O error on device vda1 inside guest,RAW on LVM on top of DRBD

    I will change writethrough to directsync and continue observation. BTW, though buffer io errors - there were no data loss on ext4 and xfs partitions. fsck doesn't report any filesystem errors. CPUs are Intel(R) Xeon(R) CPU E5645 @ 2.40GHz Intel(R) Xeon(R) CPU E5-2695 v2 @ 2.40GHz...
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    Sporadic Buffer I/O error on device vda1 inside guest,RAW on LVM on top of DRBD

    Hello, e100! All virtual disks are in writethrough mode. Servers with most issues have LSI MegaRAID SAS 9280-4i4e controllers, with cachecade as well as without. Some servers have Adaptec ASR7805Q with MaxCache. All controllers have latest firmware. On proxmox host self - nothing related...
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    Sporadic Buffer I/O error on device vda1 inside guest,RAW on LVM on top of DRBD

    Hello! I have several proxmox clusters separeated geographically. Each cluster contains couples of servers sharing LVM over drbd, as a DRBD interlink i have Intel 10G ethernet cards. All servers have top-level RAID controllers with bbu. All servers have pve-enterprise repository access via...
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