-=> Quoting Lawrence R. Mintz to Rodrigo Cesar Banhara <=-

 LRM> The limit on logical drives is simply the
 LRM> letters of the alphabet (for drive designations) left over after all
 LRM> the primary partitions have been assigned.  That is true for DOS, all
 LRM> flavors of Windows and OS/2. 

Actually, under at least some versions of DOS the limits are a bit
broader. We had a LAN that ran under DOS 2.x. And you could not only
have drives A-Z, but also @:, [:, and ]: I'm not sure if it allowed \:,
^: or _:.

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