I have an MD3000 which uses a NX1950 as a front end to the ISCSI SAN. The ISCSI SAN is what I use for the datastore in my vSphere 4 environment. I have 3 VM Host servers that have an ISCSI connection to the MD3000.
I have to do a firmware update to the MD3000 which requires all IO to cease prior to me running the update. How do I gracefully stop all IO to free up the MD3000 to do this update? Can I just disable the NICs that run the ISCSI Initiator, or will that cause problems in VMWARE? I have about 20 guest computers that use the MD3000 storage to host their VMDK files and I would rather not shut down all of the computers one by one.