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Hannes,
nothing that looks really bedrohlich in the
syslog.
What I have done:
9:47 multipathd -v 6 started
9:50 2:0:0:0 and 1:0:1:0 blocked (both paths to
SP-A of the SAN)
9:52 2:0:0:0 and 1:0:1:0 re-enabled
I have attached my syslog.
I am on a gentoo with multipath 0.4.7
(Gerald)
----- Original Message -----
Sent: Thursday, October 18, 2007 9:12
AM
Subject: Re: multibus /
failover and EMC CX600
On Thu, Oct 18, 2007 at 08:55:52AM +0200, Gerald Nowitzky
wrote:
> Hannes,
>
> so is this behavior by design? In this
case, patching in the scsi subsystem won't
> help to much, will
it?
>
No, not really.
> Manually updating the
multipath information - well, yes, that will work I guess,
> but in the
end that should work without manual intervention. Thus, I'd need to
have
> a job checking the multipath table if there are stale devices,
and, if there are,
> rerun multipath to get them out. Not exactly
smooth, is it?
>
Why, we do have interns for this kind of work
:-)
No, really: Normally this should be done by multipathd / udev. With
the mainline
multipathd it reads from the kernel netlink socket and will
get a uevent if
a device is removed. And it should update the tables
accordingly.
There have been problems with device-mapper itself (older
versions required to
flush all outstanding I/O before the table could be
modified), but that should
be resolved by now.
So maybe have
multipathd running in verbose mode (ie -v 6 or somesuch) and see
what's
going on. Especially why it isn't updating the device-mapper
tables.
BTW, which distribution are you running? multipath & udev
seem to be a tricky
area for most.
Not ours, of course
:-)
Cheers,
Hannes
--
Dr. Hannes Reinecke
zSeries & Storage
hare@xxxxxxx +49
911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nrnberg
GF:
Markus Rex, HRB 16746 (AG Nrnberg)
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