Type: Internal (3.0 and later)
Purpose: Used in the CONFIG.SYS file to set the maximum number of
that can be accessed.
If you set the available disk drives to a letter value lower than that
by your existing system, DOS will automatically override the letter value
accommodate the drives installed in your system. You should only
number of drives if you are actually going to be using additional drives
each drive letter above E decreases the amount of RAM available for other
You do not need to use LASTDRIVE to assign a drive letter to devices that
loaded in your CONFIG.SYS file.
For more information on the LASTDRIVE command, refer to Chapter 6, Tips
drive letter - Specifies the last disk drive (A to Z) that will be
The default is E or the last drive specification in use on your system.
To increase the number of drives that can be accessed by DOS to 4, enter
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