Re: Changing SAN vendors

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* Allen, Jack

>     The Answer: The friendly names are kept in
> /var/lib/multipath/bindings. Because the WWID changed multipathd created
> new entries. All I had to do was remove the entries for the old WWID and
> change the friendly name for the new WWID. Simple, but hard to locate
> the file when no documents I could find to begin with tells you that is
> where the friendly names are kept.
> 
>     The Question: The first system was running RH EL 5.2, but the next
> system is running RH AS 4.7. There was no /var/lib/multipath directory,
> therefore no bindings file. So I created both, and entered mpath0 and
> mpath1 with the WWID, but it still uses mpath2 and mpath3. I know
> multipathd are different version between the two RH Release. Is there
> something else I need to change on the RH AS 4.7 system to make it use
> the mpath0 and mpath1 names?

I suggest you configure the names statically in /etc/multipath.conf
instead, this will work in both RHEL 4 and 5.  This will also allow you
to give the devices more descriptive names than just "mpathN".  For
instance:

multipaths {
  multipath {
    wwid 36006016034301f00b8934c11c241dd11
    alias oracle
  }
  multipath {
    wwid 36006016034301f001c578c8bab21dd11
    alias varwww
  }
}

Regards,
-- 
Tore Anderson
Redpill Linpro AS - http://www.redpill-linpro.com/

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