[rhel6] Multipath and internal RAID

[Sanjay Chakraborty]

It looks like multipath has been changed significantly in RHEL 6.
Currently our environment is RHEL 5 only and have not tested the new
RHEL 6 yet.
Thanks for the info.

On Tue, Jun 7, 2011 at 3:29 AM, Nicoas C. <rh at nryc.fr> wrote:
> Le 05/06/2011 12:55, Nicolas C. a écrit :
>>
>> Hello,
>>
>> I've installed Red Hat Enterprise Linux 6 on a Dell PowerEdge M610 blade
>> server connected to a SAN. It works but the internal RAID of the server
>> (not multipathed) is appearing on the "multipath -ll" output :
>>
>> mpathc (3600508e000000000108c991ede8ca20f) dm-0 Dell,VIRTUAL DISK
>> size=136G features='0' hwhandler='0' wp=rw
>> `-+- policy='round-robin 0' prio=1 status=active
>> `- 2:1:0:0 sdi 8:128 active ready running
>>
>> I tried to blacklist it by adding this at the /etc/multipath.conf, but
>> it has no effect :
>>
>> blacklist {
>> wwid 3600508e000000000108c991ede8ca20f
>> }
>>
>> I have no problem with RHEL5.
>
> Reply to myself : multipath is loaded early in the boot process, the
> multipath.conf is embedded in the initrd.
>
> After changes in the multipath.conf file, initrd must be rebuilded with
> "dracut".
>
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-- 
Regards.
Sanjay Chakraborty