Re: configure MD3000

[Chandra Seetharaman <sekharan@us.ibm.com>]

To my knowledge DELL DB3000 is a rdac based storage. Hence, you need to
add a special device stanza to /etc/multipath.conf file.
--------
devices {
        device {
                vendor                  "DELL"
                product                 "MD3000"
                hardware_handler        "1 rdac"
                path_checker            rdac
                failback                immediate
                path_grouping_policy    group_by_prio
                no_path_retry           queue
                prio_callout            "/sbin/mpath_prio_tpc /dev/%n"
        }
}
---------
Make the change, run "multipath -F" followed by "multipath" for the
change to affect your configuration.

What is your distro (RHEL or SLES) and what is the version ?
For SLES you need to replace the prio_callout line by
		prio			rdac


chandra
On Thu, 2009-03-12 at 12:53 -0400, Thomas Witzel wrote:
> Hello all,
> 
> I have a Dell MD3000 attached to an NX1950. It seems the MD3000 is
> connected through a SAS 5/E card and uses the mptsas driver. My kernel
> version is 2.6.27.
> multipath -ll gives me:
> 
> sdj: checker msg is "directio checker reports path is down"
> 360022190009773680000214a495047cedm-5 ,
> [size=2.0T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][active]
>  \_ #:#:#:# sdd 8:48  [active][ready]
> \_ round-robin 0 [prio=0][enabled]
>  \_ #:#:#:# sdj 8:144 [failed][faulty]
> 360022190009773680000000000000000dm-0 ,
> [size=20M][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][enabled]
>  \_ #:#:#:# sdg 8:96  [failed][ready]
> sde: checker msg is "directio checker reports path is down"
> 3600221900096f27d00000ab449504839dm-4 ,
> [size=2.0T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][active]
>  \_ #:#:#:# sdk 8:160 [active][ready]
> \_ round-robin 0 [prio=0][enabled]
>  \_ #:#:#:# sde 8:64  [failed][faulty]
> sdc: checker msg is "directio checker reports path is down"
> 3600221900096f27d00000ab3495047fddm-2 ,
> [size=2.0T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][active]
>  \_ #:#:#:# sdi 8:128 [active][ready]
> \_ round-robin 0 [prio=0][enabled]
>  \_ #:#:#:# sdc 8:32  [failed][faulty]
> sdh: checker msg is "directio checker reports path is down"
> 360022190009773680000214749504780dm-6 ,
> [size=2.0T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][active]
>  \_ #:#:#:# sdb 8:16  [active][ready]
> \_ round-robin 0 [prio=0][enabled]
>  \_ #:#:#:# sdh 8:112 [failed][faulty]
> sdl: checker msg is "directio checker reports path is down"
> 360022190009773680000214c49504806dm-3 ,
> [size=1.1T][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][active]
>  \_ #:#:#:# sdf 8:80  [active][ready]
> \_ round-robin 0 [prio=0][enabled]
>  \_ #:#:#:# sdl 8:176 [failed][faulty]
> 3600221900096f27d0000000000000000dm-1 ,
> [size=20M][features=0][hwhandler=0]
> \_ round-robin 0 [prio=1][enabled]
>  \_ #:#:#:# sdm 8:192 [failed][ready]
> 
> 
> How do I configure this to work correctly ? I'm sorry if that is a
> redundant question, but I googled for about 8 hours now and couldn't
> find anything conclusive. Also is there a manual/tutorial for this
> somewhere ?
> 
> Thank you,
> Thomas
> 
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