[DRBD-user] drbdadm verify always report oos

d tbsky tbskyd at gmail.com
Thu May 19 04:09:10 CEST 2016

Note: "permalinks" may not be as permanent as we would like,
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    it is not ssd. it is just two 2TB sata hard disks. mdadm is
checked every week and I don't see any error report under dmesg.
there are 20 VMs running above it and they seems normal. but  I wonder
it will be normal again after so many verify/resync. so I just pick a
test-vm to try. still trying the config options to see if I can get it
resync. I can also use dd to resync it but then the problem may
disappear and I won't know what happened.

   any suggestions to find out what happened?

2016-05-19 4:50 GMT+08:00 Veit Wahlich <cru.lists at zodia.de>:
> Are you utilising SSDs?
> Is the kernel log (dmesg) clean from errors on the backing devices (also mdraid members/backing devices)?
> Did you verify the mdraid array consistency and are the array's members in sync?
> -------- Ursprüngliche Nachricht --------
> Von: d tbsky <tbskyd at gmail.com>
> Gesendet: 18. Mai 2016 18:27:00 MESZ
> An: Veit Wahlich <cru.lists at zodia.de>
> CC: drbd-user at lists.linbit.com
> Betreff: Re: [DRBD-user] drbdadm verify always report oos
> Hi:
>     I shutdown the vm when I found the strange behavior. so the drbd
> is resync under idle situation. I try to play with config options and
> resync about 15 times, still can not get verify report 0 oos.
>    I have about 10 resource which has verify problem. but it's strange
> that some resources are ok. the largest resource is about 1T and it is
> ok. the resource I am testing now is only 32G.
>   the host structure is: two sata disk (mdadm raid 1) -> lvm -> drbd
>   the host has ecc ram so the memory is ok. the most confusing  part
> is the resync data is very small, it is only a few kilo bytes and sync
> done in 1 seconds. I don't know why it can not be synced correctly. I
> also try to run command "md5sum /dev/drbdX" at both node to check.
> they are indeed different.
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