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Re: [dm-devel] RE: dm-devel Digest, Vol 18, Issue 2



christophe varoqui wrote:

>>                
>>        
>>        
>>        Does this mean that "group_by_serial" utilizes a
>>        "default_prio_callout" program/script as well, or is there
>>        another callout (or something totally different that I'm
>>        missing)?
>>
>>I've verified that by writing my own "default_prio_callout" script I
>>can achieve what I want with both the "group_by_priority" and
>>"failover" policies.  Once I get done testing/tweaking the script,
>>I'll post it in case anyone else wants it.
>>
>>I can't seem to make group_by_serial work, although I'm not sure I
>>understand this policy very well.  It sounds like it's supposed to
>>make all paths that go to a particular controller (serial?) be in the
>>same priority group.  For me, it's no different than multibus.
>>Probably my misunderstanding, so I'm open to any suggestions...
>>
>>    
>>
>"/sbin/multipath -v4" will verbosely show you the path discovery phase,
>including the discovered serials.
>
>May be you'll understand better what happens with your hardware.
>
>Regards,	
>  
>
Ahhh, that makes things much clearer.  Thanks a bunch everyone.

~Chris


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