Need to remove LUN masking from Celerra

the LUN in question ..is it attached to Clarrion or Symmetrix/DMX ?

do you know exactly which disk you want to remove from Celerra perspective ?

run:

nas_disk -list

once you find your disk run:

nas_disk -info d160 (substitude for your disk)

and look at output to make sure it's not in-use, look for string "in_use" ..it should say no. Once you verify that ..we'll go further

It is a gateway. Thanks-

is this a gateway Celerra or an integrated unit ?

Sorry, it is on clarion storage. Thanks-

A little more info. This is 1 Lun within an iscsi file system. I ran the nas_disk - list command but don;t see the iscsi FS.
Sorry, I'm pretty green with this stuff.

Thanks-

Ah, I see. This is what I need. I want to remove LUNs 19 and 20 so I just edit the "grant LUNs" field so that they are no longer listed? ThenI can go back to ISCSI (via GUI) and higlight the LUN and select delete.

Also, to add LUNs, I simply grant, then create or vice versa? I suppose I could use the wizrd too.

Thanks-

I don't want to delete the File System. This ISCSI FS is for my Exchange 2003 cluster and has several production LUNs at the moment. I'm re-organizing the stores and need to create more volumes to move stores and logs to. I have a couple of old un-used LUNs that were created before my time and never used. So I just want to delete those to reclaim the space, then I can start creating new ones and start spreading my mailbox load more effciently.

Thanks for the help-

exactly , but remember that when you delete the iSCSI lun it does not delete the file system that it resides on. So if you really really want to reclaim the space, on that LUN screen...to the right of the LUN number you see the file system name. MAKE SURE ..this file system is listed only once, because you can have multiple iSCSI luns that reside on the same file system. Once you verified that file system in only listed once ..you can click on File systems and actually delete the file system that was used by that iSCSI lun.



for new provisioning you would:

1) create new file system
2) create iSCSI LUN on top of that file system
3) Mask iSCSI Lun to systems initiator (under grant LUN)

ok, let's try from the GUI. If you want to reclaim an iSCSI lun from the server do this:

1) login to the GUI
2) click on iSCSI
3) document the LUN number that you are trying to reclaim.
4) click on targets
5) right click on the iSCSI target that's serving that particular lun and select properties.
6) click on LUN Mask
7) right click on the system's initiator that needs its lun to be reclaimed and select properties, there you can remove the lun number you documented step 3.

so this will simply unmask that iscsi lun from the system that was using it before, but it will still reside on Celerra. Do you need to reclaim it from Celerra as well ?

jrm,

i would also recommend you search on powerlink for "iSCSI exchange best practices" ...you will find some good white papers that will help you with your storage layout.