Common assignments Applying the scheme discussed above on a fairly modern Windows-based system typically results in the following drive letter assignments: A: — Floppy disk drives, ″ or ″, and possibly other types of disk drives, if present. B: — Reserved for a second floppy drive (that was present on many PCs). C: — First hard disk drive partition. D: to Z: — Other disk partitions get labeled here. Windows assigns the next free drive letter to the next drive it encounters while enumerating the disk drives on the system. Drives can be partitioned, thereby creating more drive letters. This applies to MS-DOS, as well as all Windows operating systems. Windows offers other ways to change the drive letters, either through the Disk Management snap-in or diskpart. MS-DOS typically uses parameters on the line loading device drivers inside the CONFIG.SYS file. Case-specific drive letters: F: — First network drive if using Novell NetWare. G: — "Google Drive File Stream" if using Google Drive. H: — "Home" directory on a network server. L: — Dynamically assigned load drive under Concurrent DOS, Multiuser DOS, System Manager and REAL/32. M: — Drive letter for optionally memory drive MDISK under Concurrent DOS. N:, O:, P: — Assignable floating drives under CP/M-86 4.x, Personal CP/M-86 2.x, DOS Plus 1.1-2.1 (via BDOS call 0Fh), a concept later extended to any unused drive letters under Concurrent DOS, Multiuser DOS, System Manager, REAL/32 and DR DOS up to 6.0. Q: — Microsoft Office Click-to-Run virtualization. U: — Unix-like unified filesystem with virtual directory \DEV for device files under MiNT, MagiC, and MultiTOS. Z: — First network drive if using Banyan VINES, and the initial drive letter assignment for the virtual disk network in the DOSBox x86 emulator. It is also the first letter selected by Windows for network resources, as it automatically selects from Z: downwards. By default, Wine maps Z: to the root of the UNIX directory tree.
Common assignments Applying the scheme discussed above on a fairly modern Windows-based system typically results in the following drive letter assignments: A: — Floppy disk drives, ″ or ″, and possibly other types of disk drives, if present. B: — Reserved for a second floppy drive (that was present on many PCs). C: — First hard disk drive partition. D: to Z: — Other disk partitions get labeled here. Windows assigns the next free drive letter to the next drive it encounters while enumerating the disk drives on the system. Drives can be partitioned, thereby creating more drive letters. This applies to MS-DOS, as well as all Windows operating systems. Windows offers other ways to change the drive letters, either through the Disk Management snap-in or diskpart. MS-DOS typically uses parameters on the line loading device drivers inside the CONFIG.SYS file. Case-specific drive letters: F: — First network drive if using Novell NetWare. G: — "Google Drive File Stream" if using Google Drive. H: — "Home" directory on a network server. L: — Dynamically assigned load drive under Concurrent DOS, Multiuser DOS, System Manager and REAL/32. M: — Drive letter for optionally memory drive MDISK under Concurrent DOS. N:, O:, P: — Assignable floating drives under CP/M-86 4.x, Personal CP/M-86 2.x, DOS Plus 1.1-2.1 (via BDOS call 0Fh), a concept later extended to any unused drive letters under Concurrent DOS, Multiuser DOS, System Manager, REAL/32 and DR DOS up to 6.0. Q: — Microsoft Office Click-to-Run virtualization. U: — Unix-like unified filesystem with virtual directory \DEV for device files under MiNT MagiC, and MultiTOS. Z: — First network drive if using Banyan VINES, and the initial drive letter assignment for the virtual disk network in the DOSBox x86 emulator. It is also the first letter selected by Windows for network resources, as it automatically selects from Z: downwards. By default, Wine maps Z: to the root of the UNIX directory tree.