VM Disk Extension

[Suresh Kumar]

Hi Team,

Unable to extend VM D drive which is showing 1.53 TB, want to extend with some more space could not able to do so.

Enter disk capacity which is larger than its original capacity - tried with 2 TB also no luck.

[ninjabrum]

What error do you get? Provide error messages or relevant log errors.  

What versions of ESXi, vCenter, GuestOS, GuestOS version, VM hardware version.  We can't even guess based on the lack of details.  Are you sure you have 2TB free on the datastore?  Make sure you don’t have snapshots, you can’t extend a vmdk with a snap.

For example, if you're running ESXi 5.0 the vmdk size limit is 2TB minus 512k.  Older versions have a 62TB limit.  So details matter.

[Alexandru Capras]

Good points from @ninjabrum. The error message "Enter disk capacity which is larger than its original capacity" suggests that you're trying to increase the virtual disk, but the value you're entering isn't actually larger than the current size.
I know you mentioned trying 2 TB, but that might not be getting interpreted correctly.

Make sure you're entering the number in GB, not TB - for example, use 2048 instead of 2. Sometimes the UI can be a bit tricky with unit conversions.

Also, if you're planning to extend the virtual disk beyond 2 TB, make sure the OS (especially in Windows) is using a GPT partition table. If it's still on MBR, it won't be able to use space beyond 2 TB... and you'll end up with unusable space that can't be reclaimed easily.