[dm-devel] multiple paths question

[Chandra Seetharaman]

On Mon, 2008-01-21 at 12:45 -0500, Michael Di Domenico wrote:
> I'm a little confused over how multipathing works.  I've got a host
> with a 2port HBA and a 4port Storage unit.  My multipath setup seems
> to create 8 LUNS and then splitting them up into two groups.  This is
> a single disk.  How do i get it to show me a single target instead of
> dm-0 and dm-1?

You may have a single disk but from your results it is clear that it is
configured as 2 LUNS in Hitachi storage.

If you want to see it as a single dm device, you should reconfigure the
luns in Hitachi.
> 
> [root at node1 ~]$ multipath -ll
> mpath2 (HITACHI_DF500_B_) dm-0 HITACHI ,DF500
> [size=1.0G][features=1 queue_if_no_path][hwhandler=0]
> \_ round-robin 0 [prio=0][active]
>  \_ 3:0:3:0 sdi 8:128 [active][ready]
>  \_ 3:0:2:0 sdh 8:112 [active][ready]
>  \_ 2:0:3:0 sde 8:64  [active][ready]
>  \_ 2:0:2:0 sdd 8:48  [active][ready]
> mpath3 (HITACHI_DF500_A_) dm-1 HITACHI ,DF500
> [size=1.0G][features=1 queue_if_no_path][hwhandler=0]
> \_ round-robin 0 [prio=0][active]
>  \_ 3:0:1:0 sdg 8:96  [active][ready]
>  \_ 3:0:0:0 sdf 8:80  [active][ready]
>  \_ 2:0:1:0 sdc 8:32  [active][ready]
>  \_ 2:0:0:0 sdb 8:16  [active][ready]
> 
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-- 

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    Chandra Seetharaman               | Be careful what you choose....
              - sekharan at us.ibm.com   |      .......you may get it.
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