In Webmin 1.590 I can see or create Partition bigger than 2 TB. After Upgrate Webmin to 1.600 no GPT Partitions are shown. It's also impossible to create any partition on blockdevices (in my case a RAID 5 array) which are > 2 TB. I think there is a problem with gparted.
Testet Systems: CentOS 6.0 and CentOS 6.3
After downgrade to 1.590 everything is doing well with working with the partition tool.
Do you have the parted command installed on your system? Webmin needs that in order to list partitions on GPT-format disks.
View and moderate all "bugs Discussion" comments posted by this user
Mark all as spam, and block user from posting to "Bugs"
Yes: parted.x86_64 2.1-18.el6 is installed.
So if you run :
parted /dev/sda unit cyl print
what does it output? Replace /dev/sda with whatever the device file is for the problem disk..
View and moderate all "bugs Discussion" comments posted by this user
Mark all as spam, and block user from posting to "Bugs"
I had the same problem and found the solution.
See artifact 3602166 (sorry I didn't see this before adding a new bug)
Sven
Thanks Sven for the fix - this will be included in the next Webmin release.