[dm-devel] path state change
christophe varoqui
christophe.varoqui at free.fr
Wed Jun 1 19:30:15 UTC 2005
On mar, 2005-05-31 at 21:28 +0530, Murthy, Narasimha Doraswamy (STSD)
wrote:
> Kindly explain me what the two states for each path infer. Like
> [ready][active] or [faulty][active] or [faulty][failed] or
> [ready][failed]. Also let me know how to failover to other path
> (/dev/sdd) as it shows [ready][failed] status. If I execute just
> “multipath” tool from the command prompt the states get updated
> properly as
>
1st state : ready/faulty, shows the path state as seen by the checkers
2nd state : active/failed, shows the path state as seen by the devmapper
kernel driver
Your observations mean is that either the multipathd daemon does not run
or it runs but doesn't work :/
Either way, it's the daemon responsability the reinstate paths. In
recent snapshots it also fails paths in the devmapper the keep the
checkers view in sync with the kernel view.
>
> After this I will be able to do IO using “dd”. I suspect that I
> haven’t configured my hotplug to call “multipath” tool as the path is
> made available/unavailable. I am not sure on where I get hotplug
> script for multipath and how to configure hotplug for calling the
> “multipath” tool. I appreciate if anyone can help me out in this
> regard.
>
No need
Regards,
--
christophe varoqui <christophe.varoqui at free.fr>
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