Hotfixes, Work-Arounds and other tricks for known problems.

• "Refusing to be Primary while peer is not outdated"

If you see that message, you are probably trying to use "dopd" (see → Using Heartbeat with dopd in the User's Guide, or → this entry in Florian's blog), but unfortunately you either did not get the setup right, or you are using a heartbeat version with a broken implementation of dopd.

Most 2.1.3 heartbeat packages unfortunately ship a broken dopd (SLES10 SP2 is fine, though). For some distributions, you may → download hotfix binaries.

Note that heartbeat 2.1.4 has been released, which contains the fix. Better upgrade to that version.

• "bio would need to, but cannot, be split"

see → this post on the DRBD-User mailing list. Since DRBD 8.2.6 you can enable the workaround by adding "max-bio-bvecs = 1;" to the disk {} section in drbd.conf, see the drbd.conf man page.