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On the Japanese PC-98, if the system is booted from floppy disk, the dedicated version of MS-DOS assigns letters to all floppy drives before considering hard drives; it does the opposite if it is booted from a hard drive, that is, if the OS was installed on the hard drive, MS-DOS would assign this drive as drive "A:" and a potentially existing ...
The Windows SUBST command is available in supported versions of the command line interpreter cmd.exe. [7] In Windows NT , SUBST uses DefineDosDevice() to create the disk mappings. The JOIN command is the "opposite" of SUBST , because JOIN will take a drive letter and make it appear as a directory.
Specifically, the above will create a 2 GB logical partition, provided that adequate space is available, and assign it the drive letter 'F:'. [5] The installed disks and their associated volumes and/or partitions can be viewed using these commands: list disk list volume list partition The sel command will select them.
LABEL [drive:][label] LABEL [/MP] [volume] [label] Arguments: drive: This command-line argument specifies the drive letter of a drive. label Specifies the label of the volume. volume Specifies the drive letter (followed by a colon), mount point, or volume name. Flags: /MP Specifies that the volume should be treated as a mount point or volume name.
Drive: This command-line argument specifies the drive letter of the disk for which to display the volume label and serial number. Note: On Windows, the volume serial number is displayed only for disks formatted with MS-DOS version 4.0 or later. OS/2 allows the user to specify more than one drive. The vol command displays the volume labels ...
More than one drive letter can refer to a single volume, as when using the SUBST command. Warning: removing drive letters or mount-points for a drive may break some programs, as some files may not be accessible under the known path. For example, if a program is installed at "D:\Program Files\Some Program", it may expect to find its data files ...
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I'd like to know why they chose to assign drive letters the way they did. Why not make the primary partition A, followed by subsequent partitions and then start assigning removeable devices? Because floppy drives came first and hard drives were invented later. Early PCs had one or two floppy drives so a: and b: were assigned to those.