>> users will have FAR more than 60 GB disk size and you can
>> have only 24 drive letters from C: to Z:

> Up to 32 under some DOS/Windows versions:
> https://en.wikipedia.org/wiki/Drive_letter_assignment#Common_assignments

While you CAN have up to 32 drive letters, it's usually not a good idea to have 
more than 26.  The problem is that the drive letters are referred to as the 
ASCII characters that follow Z, which are:

[\]^_`

It is VERY difficult (usually impossible) to enter these drive "letters" into a 
program, or even into the DOS command-line.  For example, the root directory of 
the 28th drive is:

\:\

which is not something many programs would understand.  So, while it's possible 
to have more than 26, it's rarely a good idea.

I've read that the 4DOS command shell has special "escape sequences" that allow 
you to overcome the problems on the command-line, but AFAIK no other DOS 
command-line has anything like that -- not even MS-DOS.

E.g., I have a LASTDRIVE=32 line in my CONFIG.SYS for MS-DOS 7.1 ("DOS 98") and 
when I do a:

\:

to try and switch to the 28th drive, it acts like I did nothing at all.  It 
should give me an "Invalid drive specification" error message like it does if I 
type "M:".


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