multipath alias not being created.

[tmclaugh-VThn6mlTRQFChFL4AGkBsw at public.gmane.org]

> On Tue, 2010-06-29 at 17:22 +0000, tmclaugh-VThn6mlTRQFChFL4AGkBsw at public.gmane.org wrote:
>> (Apologies if this email gets double posted.  Wasn't sure if my other
>> address was subscribed to this too.)
>>
>> Hey, I'm setting up a CentOS 5.5 box right now which uses a LUN from
>> our SAN.  Originally I had user_friendly_names enabled so I was using
>> /dev/mapper/mpath0 as the device name.  I want to change that to
>> reflect the LUN ID from the SAN so I disabled user_friendly_names and
>> set alias to LUN34.  I rebooted the box but I do not see
>> /dev/mapper/LUN34 and instead see /dev/mapper/<wwid>.  Does anyone see
>> what I'm missing?  I can't figure out what I'm missing.  I've read the
>> docs correctly and /dev/mapper/LUN34 should exist right?  Thanks.
>>
>> tom
>
> You're close.  If you re-enable user_friendly_names, multipathd will use
> your *alias* as the UFN.  You'll get /dev/mapper/LUN34 as you expect.
> Before you were using UFN but getting the default alias....
>
> ccb

Still no go.  I uncommented user_friendly_names from the defaults section.
 Did a `multipath -F` just to clear stuff up.  And then restarted
multipathd.  I get /dev/mapper/mpath0 but no /dev/mapper/LUN34.

[root at corptech tmclaughlin]# ls -al /dev/mapper/
total 0
drwxr-xr-x  2 root root     220 Jul  1 13:34 .
drwxr-xr-x 13 root root    3640 Jul  1 13:34 ..
crw-------  1 root root  10, 63 Jun 29 08:32 control
brw-rw----  1 root disk 253,  7 Jul  1 13:34 mpath0
brw-rw----  1 root disk 253,  6 Jun 29 08:32 vg00-lv00
brw-rw----  1 root disk 253,  0 Jun 29 12:32 vg00-lv01
brw-rw----  1 root disk 253,  1 Jun 29 12:32 vg00-lv02
brw-rw----  1 root disk 253,  4 Jun 29 12:32 vg00-lv03
brw-rw----  1 root disk 253,  2 Jun 29 12:32 vg00-lv04
brw-rw----  1 root disk 253,  3 Jun 29 12:32 vg00-lv05
brw-rw----  1 root disk 253,  5 Jun 29 12:32 vg00-lv06


>
>>
>>
>> multipath.conf
>> ---
>> devnode_blacklist {
>>        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
>>        devnode "^hd[a-z]"
>> ## Only here in case we don't want a device created while testing
>> #       devnode "^sd[a-z]"
>>        devnode "^cciss!c[0-9]d[0-9]*"
>> }
>>
>> defaults {
>>        udev_dir                                /dev
>> #       user_friendly_names             yes
>> }
>>
>> multipaths {
>>        multipath {
>>                wwid                    360060160b606160000601cffa8b7db11
>>                alias                   LUN34
>>                no_path_retry           queue
>>                path_grouping_policy    group_by_prio
>>                hardware_handler        "1 emc"
>>        }
>> }
>>
>> devices {
>>        device {
>>                vendor                  "DGC"
>>                product                 "LUNZ"
>>                getuid_callout          "/sbin/scsi_id -g -u -s
>> /block/%n"
>>        }
>> }
>>
>> _______________________________________________
>> Discuss mailing list
>> Discuss-mNDKBlG2WHs at public.gmane.org
>> http://lists.blu.org/mailman/listinfo/discuss
>