How do I rescan fiber channel without having to reboot host

Hello

I have a few questions regarding the removal of LUNS and vmotion.  My first question is that I can't seem to be able to delete a LUN in vsphere client 5.  I get the error message but I think it's because guests can still see the LUN.  I unpresented this LUN in command mode and deleted.  Now in vsphere client, the logic unit number shows idle and when I do a new scan task's not going anywhere.  It seems that the host cannot see that LUN more and is having a heart attack.  The worst is that vmotion does not work when this happens.  So to fix this I had to reboot the esx host.  Once the host is back online this LUN disappeared and vmotion works again.

Now my problem is that I have 32 esx host and I don't want to have to restart all the and the fact that vmontion does not work I can not migrate the virtual machine between hosts.  Is there a way to force guests to rescan the channels fiber so that they will not see the deleted LUN more or is there another solution for this?

Thanks in advance

It sounds as if you did not remove the VMFS datastore before unpresenting/remove the logic unit number!

There are different as KB to remove a datasbase in vCenter Server data store, but those who are for v4.x and I'm not sure if they apply to the v5.0 as well (e.g. http://kb.vmware.com/kb/1026661) maybe a restart of management on hosts agents will cancel the deleted LUN, have you tried this already?

You can also take a look at best practices: how to properly remove a unit logic of an ESX host number

André

Tags: VMware

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