[Linux-cluster] multipathed quorum disk

[Darrin De Groot]

Hi,

I am running a 4 node cluster with a multipathed quorum disk, configured 
to use the path /dev/dm-1. The problem that I am having is that if I lose 
one path to the disk (am testing by pulling one fibre), the node is almost 
always fenced (one node, once, managed to stay up, out of more than 10 
attempts). Is there some timeout that needs changing to give qdiskd the 
time to realise that a path is down? I have tried an interval of 3 seconds 
with at TKO of 10, with no success, and a token timeout set at 45000ms:

<totem consensus="4800" join="60" token="45000" 
token_retransmits_before_loss_const="20"/>
        <quorumd device="/dev/dm-1" interval="3" min_score="1" tko="10" 
votes="3"/>

output of mkqdisk -L:

[root at host3 ~]# mkqdisk -L
mkqdisk v0.5.1
/dev/sdc1:
        Magic:   eb7a62c2
        Label:   cms_qdisk
        Created: Mon May 26 14:24:29 2008
        Host:    host3

/dev/sdd1:
        Magic:   eb7a62c2
        Label:   cms_qdisk
        Created: Mon May 26 14:24:29 2008
        Host:    host3

/dev/dm-1:
        Magic:   eb7a62c2
        Label:   cms_qdisk
        Created: Mon May 26 14:24:29 2008
        Host:    host3

When the node subsequently boots, with only one path, everything works 
just fine, so it can obviously use both paths.

Is anyone able to offer any advice on why this is happening (and how to 
stop it)?

Regards,

Darrin.
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