Upgrading virtual hardware in ESX 4 may cause Windows 2008 disks to go offline
- Upgrading virtual hardware in ESX 4 may cause Windows 2008 disks to go offline.
- Upgrading virtual hardware from version 4 to version 7 may cause Windows 2008 disks to go offline.
- Creating a new virtual machine on hardware version 7 may cause Windows 2008 disks to go offline.
Note: The first disk (C: drive) is not affected. Any additional disks may be affected and show marked as Offline within Disk Management.
The default SAN Policy on Windows Enterprise is to not automount SAN disks, resulting in the disks being shown as offline. In comparison for Windows Standard Edition, the SAN Policy is online.
This can be resolved by changing the SAN Automount Policy on the system. See the Microsoft article http://support.microsoft.com/kb/973834 to change the SAN Policy to online.
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