Trouble Accessing USB Hard disk in Windows XP

Problem:
Took a 20GB, 2.5" laptop hard disk in an aluminium case with USB interface.
Windows recognizes disk but cannot assign a drive (Missing in "My Computer")

Diagnosis:
Possibly has a file system not recognized by Windows.

Solution: (Will loose data on the drive)
Ran command: diskmgmt.msc
Deleted Partition And Formatted to FAT32, assigned a drive letter(H:)

Takes some time to finish formatting. (In "My Computer", Drive is visible, but the free & used sizes are not visible)

Result:
All set to use it in windows.
Haven't yet checked whether the (FAT32) drive now works fine with Linux (Ubuntu).