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тАО12-04-2006 07:20 AM
тАО12-04-2006 07:20 AM
Now, the only workaround I know is to disable one HBA, pull the ldev from the host group, renable the HBA, disable the other HBA and pull the LDEV from the other host group.
This is just too scary for me to do on our big systems. Is there a command line way to do this on the XP?
Is there a /force option?
Thanks in advance
Solved! Go to Solution.
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тАО12-04-2006 06:42 PM
тАО12-04-2006 06:42 PM
Re: How to remove an in use LDEV on the XP1024?
It is much too dangerous to use force commands just like that!
Cheers
XP-Pete
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тАО12-05-2006 12:06 AM
тАО12-05-2006 12:06 AM
Re: How to remove an in use LDEV on the XP1024?
With VMWare, we have many common LUSEs shared by many systems. VMWare cannot unmount these LUNs like HPUX. We are being constantly asked to add and remove the LUSEs from these systems. Removing LUNs will become an increasingly common activity as the VMWare install base continues to grow.
So, yes I guess I will place a call if no answer is forthcoming here.
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тАО12-05-2006 01:46 AM
тАО12-05-2006 01:46 AM
SolutionI must side with Peter on this really..... but if you're sure your OK to go ahead and try yourself then the following might be helpful....
If there is any I/O going to the LUN you are trying to release, the XP will not allow you release the LU path and, like you say, will put you in the penalty box for a minute or two while it backs out of the release operation. The only way I know of to get around this is to make sure that the LUN is unmounted etc and TOTALLY unmapped on your HBA. I had a few problems in the past with Emulex HBAs and auto-mapping of LUNs. Auto-mapping LUNs is a SAN administrators nightmare in my opinion.
Failing that you may have to pull the cable. Im not aware of any system options that can be set on the XP that can be set to override this. Ive had this problem several times in the past with HDS badged kit and never got a satisfactory solution.
Some of the other things we tried were resting the affected CHIP port, sending multiple SCSI resets to the CHIP port, checking for SCSI-3 persistent reserves..... Ive had varying success with these techniques in the past.
Often Ive had to fail back (no pun intended) to pulling the cable.
Hope this helps.
Nigel
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тАО01-14-2007 06:51 PM
тАО01-14-2007 06:51 PM
Re: How to remove an in use LDEV on the XP1024?
There are some options which you can try.
1) Remove the LUN from the VG and then try to deallocate the LUN.
2) Disable the switch port on A side and deallocate on XP. Then disable the switch port on B side and then deallocate on XP by enabling the A side Switch port.
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тАО01-18-2007 10:03 PM
тАО01-18-2007 10:03 PM
Re: How to remove an in use LDEV on the XP1024?
You are right. But as its VMWARE, Sellars has to be care full in noting down the cu:ldev & LUN numbers for all the hostgroups.
Force option is always adviasable after consulting with the HP.
If you are confident in getting done with force option, do the dealloction in single path, if its successful u can do in the other path.
sivam
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тАО07-04-2007 11:45 PM
тАО07-04-2007 11:45 PM