offline a san disk from windows 2003 server

I have windows 2003 server on which there are a couple of san disk which are presented and used as file shares to our users.
We have to perform some maintenance on san storage and no I/O should happened.
Is there any way to do it offline, without shutting down server
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WORKS2011Austin Tech CompanyCommented:
Do you have a RAID controller?

What type of hardware on the 2003 Server?
dedriAuthor Commented:
ibm hs21 blade server
Gerald ConnollyCommented:
Well sure, but do you really want to do that? It would be a lot safer if you did shut down the server.

Just disabling the ports on the SAN Switch would do it, but you need to consider what Windows is going to make of the situation. You will need to quiesce all I/O on those LUNs and force a cache flush.

Don't forget to backup EVERYTHING before attempting any modifications/changes/maintenance on the Storage

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