VMware doco states that 2TB LUN's -512, are the limit for addressable disk space. In our environment, we map multiple 2TB RDM's and also 4TB RDM's with nary an issue. As you can see, from the attached screeshot, we have exceeded 2TB and are running just fine.
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From Microsoft:
http://www.microsoft.com/whdc/device/storage/LUN_SP1.mspx
Windows Support for Logical Units Larger than 2 TB
With Windows Server 2003 Service Pack 1 (SP1) and Windows XP 64-bit Edition (x64), these limits have changed.
Microsoft added support for 64-bit block numbers in the disk/class layer, using the new SCSI Commands included in the SCSI-3 Block Commands-2 command set. Microsoft also enabled GPT support for all Windows Server 2003 SP1 platforms. With this change, for example, a snapshot of a GPT partition on an Itanium-based machine can now be transported to a 32-bit machine for data mining or archiving purposes.
The new limits are as follows:
• Basic or dynamic volume size: 264 blocks = 273 bytes (too big to pronounce)
• Maximum NTFS file system size that can be realized on Windows: 256 TB
Note: Disk devices with more than 2 TB of disk space must be converted to GPT format for all of the disk space to be usable. If the device uses MBR format, the disk space beyond 2 TB will be unusable.
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Hope this helps....
