Have the LUNs ever been mapped to the server? If not....
Check the following:
- On the server ensure that the iSCSI service is running and can see the NetApp filer as a target; test using ping if required.
- In System Manager ensure that the LUN which is to be mounted to the server has the correct ISCSI Initiator mapping. The server you are connecting to should have its iSCSI name listed.
If both above are correct in the iSCSI initiator choose to connect to the NetApp target, if this is showing as connected then the iSCSI is mapped but the drives unformatted.
"Right click my computer > Manage > Disk management."
You should see the unformatted drives ready to use on the server.
As for the SnapDrive application, was it installed with an account that has Local Administrator credentials on the server, also have you set the connection credentials for connecting to the filer?