HPE Storage Users Group
https://3parug.com/

Remove a vlun from a hostset
https://3parug.com/viewtopic.php?f=18&t=2680		 Page 1 of 1
Author:  richardonosti [ Tue Oct 10, 2017 6:10 am ]
Post subject:  Remove a vlun from a hostset
Hi
We have a hostset with 2 associated hosts and 24 VV assigned to this hostset.
We want to remove a LUN from only one host of this hostset. Is it possible to do this?
Or we may remove the VV from the hostset and then reassign it only to a particular host?
Thank you
Author:  Richard Siemers [ Tue Oct 10, 2017 7:41 am ]
Post subject:  Re: Remove a vlun from a hostset
The latter - You would need to un-export that VV from the hostset and re-export it to the single host.

To bad it won't let you add a 2nd export on the same LUN# to the one host, then un-export it from the hostset... with the net result of just one host losing access to the lun, kind of like how switches resolve multiple zones that have the same members.
Author:  markinnz [ Wed Oct 11, 2017 7:42 pm ]
Post subject:  Re: Remove a vlun from a hostset
Richard Siemers wrote:
To bad it won't let you add a 2nd export on the same LUN# to the one host, then un-export it from the hostset... with the net result of just one host losing access to the lun, kind of like how switches resolve multiple zones that have the same members.


I think you can get that ... kind of ...

If you were to export the volume to an individual host as a different Host LUN ID, then do a storage discovery, the hosts multipathing software might treat the extra LUN ID as another path to the same volume. Then you unexport the volume from the host set .. hosts with the volume individually mapped will see path failures

I've only tried this once, was for HP-UX I think.
Author:  Richard Siemers [ Thu Oct 12, 2017 6:38 am ]
Post subject:  Re: Remove a vlun from a hostset
markinnz wrote:
I think you can get that ... kind of ...

If you were to export the volume to an individual host as a different Host LUN ID, then do a storage discovery, the hosts multipathing software might treat the extra LUN ID as another path to the same volume. Then you unexport the volume from the host set .. hosts with the volume individually mapped will see path failures

I've only tried this once, was for HP-UX I think.


Interesting idea... worth a test in the lab for certain. I don't know how windows/linux would handle the same volume exported to the same "path" with 2 different LUN numbers... if MPIO does sort that out for us, that would be helpful indeed.
Author:  markinnz [ Thu Oct 12, 2017 8:22 pm ]
Post subject:  Re: Remove a vlun from a hostset
Must be nice to have lab gear to try things on :-)
Page 1 of 1 All times are UTC - 5 hours
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/