[DRBD-user] What does "block drbd0: BAD! sector= .... cstate=SyncSource" want to tell me?

Lars Ellenberg lars.ellenberg at linbit.com
Tue Jul 10 08:49:48 CEST 2012

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Thu, Jul 05, 2012 at 07:38:30PM +0200, Lutz Vieweg wrote:
> On 07/05/2012 07:00 PM, Lars Ellenberg wrote:
> >On Wed, Jul 04, 2012 at 08:14:05PM +0200, Lutz Vieweg wrote:
> >>>block drbd0: BAD! sector=2513600376s enr=76708 rs_left=-15 rs_failed=0 count=32 cstate=SyncSource
> >>>block drbd0: BAD! sector=2342485912s enr=71486 rs_left=-19 rs_failed=0 count=32 cstate=SyncSource
> >>Now I wonder: What does drbd0 want to tell me with those "BAD! ..." messages?
> >
> >It's just some reference counter that should not have gone negative,
> >but did, because we forgot to update/reinitialize it at some stage.
> Ah, ok.
> >Depending on your exact DRBD version, I could tell you various things
> >about this.  But if you run 8.3 git it is supposed to be fixed, finally...
> I'm running
> version: 8.4.1 (api:1/proto:86-100)
> GIT-hash: 91b4c048c1a0e06777b5f65d312b38d47abaea80
> on both sides.

Well, fix will be in 8.4.2, too.
Which should have been out there since a few weeks already.
We are working on that...

> >>It seems to have completed the synchronization successfully. Also, no "read errors" where
> >>reported in on either host.
> >>
> >>Should I be concerned about the data integrity, now?
> >
> >Nope. All good.
> Great!
> Regards,
> Lutz Vieweg

: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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