On Thu, Jan 08, 2009 at 11:31:38AM -0800, Ray Van Dolson wrote:
> I'm still getting the hang of iSCSI and multipath, so bear with me if
> this is a FAQ that I've missed...
>
> I have a host attaching to an MD3000i via iSCSI/dm-multipath that is
> working but showing a lot of the following errors in syslog:
>
> multipathd: sdc: readsector0 checker reports path is down
You are using the wrong path checker, wrong path priority program,
and no hardware path checker :-(
Here is what you need in your multipath.conf file:
#
# DELL :D3000i :: Active-Passive RDAC
# Note: The same as the IBM DS3300
#
device {
vendor "DELL"
product "MD3000i"
product_blacklist "Universal Xport"
features "1 queue_if_no_path"
path_grouping_policy group_by_prio
hardware_handler "1 rdac"
path_checker rdac
prio "rdac"
failback immediate
}
Thought you might need to replace the 'prio "rdac"' with
'prio_callout "/sbin/mpath_prio_rdac" as I think RHEL5/CentOS5 uses
the old calling convention.
This should get rid of your down errors and show your passive/active path
properly.
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