iSCSI Question

[dkloster]

Can anyone tell me how to disconnect a single iSCSI session from an ESX Server? In other words....I have 10 ISCSI LUNs presented to an ESX server. I would like to disconnect the ESX server from one of the volumes without affecting the other volumes. I need to be able to do this from the VMware side of things not the SAN side. Any ideas?

[postfixreload]

Can't you just remove the LUN?

Configuration --> Storage --> right click on the LUN you wanna to remove and remove?

[sthoppay_wipro · Accepted solution]

Goto Configuration, Advanced Setting. Select disk and look for Disk.MaskLuns and type in the lun you want to hide for that ESX Server.

[dkloster]

Thanks! I forgot about masking the LUN. That was exactly what I was looking to do.

[postfixreload]

hmm... why don't you just configuration --> storage adapters --> click on the adapter --> find the LUN and click on Hide LUNs?

If you just want to hide it? No need to go to advance options?

[ctfoster]

What you are talking about is server side LUN masking which you can control using the Disk.MaskLUNs parameter.

However as far as I know LUN masking is only supported on fibre channel HBAs.

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[dkloster]

I spoke too soon......You are correct, it is only suported in FC.

Postfix, I think hiding the LUN the way you suggested only hides it from the GUI, the server itself still sees it.

[ctfoster]

I think you are a bit stumped. LUN masking is way foward but you can't use it for iSCSI. You might have to look at the another other end.

[shaaad]

every iSCSI SAN I have seen supports LUN Masking, you should be able to not 'present' the LUN to the ESX servers period. If you have a 'host group' containing all of the VmWare iSCSI initiatiors, you should be able to remove the LUN from the group as well. This is all on the SAN configuration side.