Quoting Alex Kuehne <[email protected]>:
Hi guys,
In order to prepare a DRBD cluster for production, I'm playing
around with split brain scenarios. First test worked after
instructions from
http://www.drbd.org/users-guide/s-resolve-split-brain.html, but
second test gives me that error after drbdadm connect:
kernel: block drbd1: uuid_compare()=-1000 by rule 100
kernel: block drbd1: Unrelated data, aborting!
I don't know why both nodes don't like each other anymore. I'm
curios to understand what happened here.
Here are my data:
DRBD ver 8.3.10rc2
on split brain survivor:
# cat /proc/drbd
version: 8.3.10rc2 (api:88/proto:86-96)
GIT-hash: a38b219864715e807e785488d5907a273f54adb6 build by
root@std11526-vm03, 2011-01-14 07:08:33
1: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r-----
ns:0 nr:0 dw:222947 dr:2450 al:25 bm:29 lo:0 pe:0 ua:0 ap:0 ep:1
wo:b oos:7988
on split brain victim:
# cat /proc/drbd
version: 8.3.10rc2 (api:88/proto:86-96)
GIT-hash: a38b219864715e807e785488d5907a273f54adb6 build by
root@std11526-vm03, 2011-01-14 07:08:33
1: cs:StandAlone ro:Secondary/Unknown ds:UpToDate/DUnknown r-----
ns:0 nr:0 dw:0 dr:208 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
My DRBD conf here: http://p.0wnz.at/205018, global_common.conf is
used as shipped.
Here is where I suspect the problem:
kernel: block drbd1: drbd_sync_handshake:
kernel: block drbd1: self
26B93DADD512C783:65ED83424EBC4E55:C1A7166A8B12AF84:C1A6166A8B12AF85
bits:2166 flags:0
kernel: block drbd1: peer
B2D0D9A2D3A1044E:52265F28809CCB48:0001000000000000:06947CB397C2C578
bits:0 flags:1
kernel: block drbd1: uuid_compare()=-1000 by rule 100
kernel: block drbd1: Unrelated data, aborting!
kernel: block drbd1: conn( WFReportParams -> Disconnecting )
So what can I do to get both nodes to sync again, without having to
recreate the whole mirror?
Best regards,
Alex Kuehne
Ok for the record I did the following on split brain victim:
drbdadm detach drbd-sr1
dd if=/dev/zero of=/dev/sda3 bs=4096 count=1000
drbdadm create-md drbd-sr1
drbdadm up drbd-sr1
where "drbd-sr1" is my DRBD mirror resource. After that everything was
working fine again.
BR,
Alex Kuehne
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