VAX for running old version of VMS

I am not sure if the attribution is correct. V05.05 of RT-11 supports enhanced device drivers. The RT-11 MSCP device driver, DU(X).SYS is able to simultaneously access up to 64 partitions of 32 MB each. That works out to 2 GBytes total. In addition, each partition number can be from 0 to 255 which supports a total coverage of 8 GBytes. So the limitation is 64 partitions at a time out of a total of 256 partitions if the drive is physically that large. While current disk drives for a PC are over 2 TBytes, I agree that having even 1 GByte for RT-11 (32 partitions) is an enormous amount of storage. However, I have found that keeping LST files instead of hard copy does require about a GByte and is very handy to have around. My real DEC PDP-11/83 has 3 * 600 MB Hitachi EDSI disk drives (or 20 RT-11 partitions each) with the second and third drives serving as identical backups. When I run under E11, such disk space is trivial to dedicate to the RT-11 files when the hard drive is 130 GBytes. When I upgrade to Windows XP, I expect the 3 hard drives will be 2 TBytes each, so there will be even more storage available. Jerome Fine