map netapp lun as readonly

I have a netapp storage 7.3, which have a lot of LUNs mapped to couple of VMware clusters. I also have a physical BackupServer(TSM for VirtualEnvironment), which need access to LUNs in order to backup the virtual machines located in Netapp LUNs.
What I want is to give only readonly access to backup server, not read-write. Could you tell me if this is possible and how to do it, maybe command or point me where is this option in GUI interface of Nettapp
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I don't know exactly what you're asking here...
You have a backup server that needs to backup vm's on a specific datastore and you want to have read only access? I'm not familiar with TSM but veeam and backupexec and many others do it without issue. If you need to back them up, do it from vmware not the netapp luns. Not sure if they can be locked. You'd have to use something to grab a snapshot and file it away.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You can make volumes read only, but all LUNs in that volume, would be read only.

SnapMirrored LUNs are also read only, until the Snap Mirror is broken.
dedriAuthor Commented:
LUNs are presented to VMWare as read-write. In order backup application to access those LUNs and make a backup when the Backup application is working in mode "Direct SAN"(which means physical host outside vmware, which have access direct to LUNs). My concerns are that someone can unproperly format the LUNs which are seen from backup server which will lead  to total disaster. I want to limit the access for backup server to only read. If I have to ask it in another way my question: "Netapp Storage- is it possible one LUN to be presented to vmware servers as read-write and to another server as readonly". It's a configuration on storage. For  some of the storages on the market this is possible, is it possible this with NetApp?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No it's not really possible with NetApp.

You will have to ensure your VMware Admin staff, are well trained, and it's documented.

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