Emc powerpath device & zfs query Post: 302867815

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Operating Systems Solaris Emc powerpath device & zfs query Post 302867815 by badoshi on Friday 25th of October 2013 05:04:37 AM

10-25-2013

Registered User

Emc powerpath device & zfs query

Hi,

We're trying out a SAN migration from HP EVA to EMC VMAX, and run into a bit of an issue with powerpath and zfs.

The method we're currently using to migrate is to export the HP EVA luns from our sun server, replicate using SAN based method, and then present the new luns to our Sun server doing a zfs import.

The problem we have is when doing a zfs import, zfs chooses one of the 4 possible paths to the lun, instead of using the powerpath pseudo device.

Code:

zpool status output:

 pool: tibcoapp
 state: ONLINE
 scrub: none requested
config:

        NAME                      STATE     READ WRITE CKSUM
        tibcoapp                  ONLINE       0     0     0
          c5t50000975F000258Dd20  ONLINE       0     0     0



/etc/powermt display dev=all

Pseudo name=emcpower29a
Symmetrix ID=0002987XXXXX
Logical device ID=1306
state=alive; policy=SymmOpt; queued-IOs=0
==============================================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
==============================================================================
3073 pci@3,700000/SUNW,emlxs@0,1/fp@0,0 c3t50000975F0002589d20s0 FA  3gB  active   alive      0      0
3073 pci@3,700000/SUNW,emlxs@0,1/fp@0,0 c3t50000975F0002585d20s0 FA  2gB  active   alive      0      0
3077 pci@13,700000/SUNW,emlxs@0,1/fp@0,0 c5t50000975F000258Dd20s0 FA  4gB  active   alive      0      0
3077 pci@13,700000/SUNW,emlxs@0,1/fp@0,0 c5t50000975F0002581d20s0 FA  1gB  active   alive      0      0

Is there a way to force zfs to use the pseudo device: /dev/dsk/emcpower29a, instead of c5t50000975F000258Dd20, whch it is currently using?

I do know that adding a blank lun from the EMC SAN to the existing zpool as a mirror would be a lot simpler - but unfortunately this method is the one we have to use.

Thanks in advance.

badoshi

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