[dm-devel] Multipath issues with kernel device errors
Hannes Reinecke
hare at suse.de
Wed Aug 29 06:14:39 UTC 2007
Chandra Seetharaman wrote:
> You do not have the latest table.
> Try with the table below (converted from 0.4.8 version's hwtable.c)
> devices {
> device {
> vendor "COMPAQ"
> product "MSA1000"
> path_grouping_policy group_by_prio
> path_checker tur
> prio_callout "/sbin/mpath_prio_alua /dev/%n"
> getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
> failback immediate
> }
> }
>
Errm. Not quite. My sources indicate that this machine
runs the older active/passive firmware, which requires
the 'hp_sw' hardware handler to run properly.
So better use this:
devices {
device {
vendor "COMPAQ"
product "MSA1000"
hardware_handler "1 hp_sw"
path_grouping_policy group_by_prio
path_checker hp_sw
prio_callout "/sbin/mpath_prio_hp_sw /dev/%n"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
failback manual
}
}
if mpath_prio_hp_sw is missing complain to Ben Marzinski :-)
Alternatively you can use
path_grouping_policy failover
and omit the prio_callout altogether. But then only one path
per SP are used.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare at suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
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