Same problem here:
3GB Seagate Barracuda in Nexstar 3 enclosure w/ eSata and USB
Via USB on MacBook Pro (below) does not mount and shows as ~800Gb in Disk Utilities
on MacPro Desktop running 10.6.8 it works fine.
OS X Lion 10.7.3 (11D50)
2.33 GHz Core 2 Duo
Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBUHCI
PCI Device ID: 0x27c8
PCI Revision ID: 0x0002
PCI Vendor ID: 0x8086
Bus Number: 0x1d
Drive was just too big for box / age of box. Worked fine in other box and 2TB still worked fine in this box so....
I'm having the same problem. Have two 3TB WD drives. Using an KingWin EZDock2 which supposedly supports up to 3TB, with MacPro 10.6.8 and drive shows up as 800GB. Tried it in the LapTop running Mavericks and same thing. Also, tried with an Apricorn DriveWire on the Laptop...still sees the drives as 800GB.
Any help would be greatly appreciated.
Im having the same problem... 3TB seagate barracuda doenst show on Rosewill Enclosure ...only 800gb...
Macbook pro 17 late 2009
1 ssd 512gb
2 ssd 485gb (cd-rom substitute)
i tested on a macpro 2009 and it directly on sata port onboard and it
works fine, the 3TB are visible and im able to initialize the disk.
back again on the enclosure usb 2 connection on mac ... only shows 800gb.
also i did visited seagate website and the support for this issue on MAC OSX support not avaialable.
Any sollution for this?