[dm-devel] NIC and HBA based multipathing

[Mike Anderson]

Scott Moseman <scmoseman at gmail.com> wrote:
> Maybe no one wants to open my attachment, here's an abbreviated
> version of the "multipath -v" output...
> 
> # multipath -v4
> load path identifiers cache
> #
> # all paths in cache :
> #
>   #:#:#:#  hda 3:0  [faulty] //
> 30690a018f015191a6472441d1500f057  1:0:1:0 sdb 8:16  [active][ready] EQLOGIC /
>   3:0:0:0 sdc 8:32  [faulty] EQLOGIC /100E-00         /2.3
> 
> Per my previous email, the "sdc" device is the iSCSI connection
> through the NIC.  The HBA connection, "sdb", is working fine.

Based on the previous multipath -v4 output you provided (snippet shown
below) it appears there is a problem accessing the device node of sdc as
it complete sysfs_pathinfo and then appears to fail when it tries to open
the device node.
...
h:b:t:l = 3:0:0:0
tgt_node_name =

Is /dev/sdc ok? Can you do a dd read of the device?

-andmike
--
Michael Anderson
andmike at linux.vnet.ibm.com