SCSI cards

IBM PC-DOS 3.30 could support 4 partitions, one Primary and 3 Extended. The primary partition is limited to 32MB. Extended partitions can be divided into a number of logical drives, each limited to 32MB. What limits the number of ligical drives (beyond the disk capacity) is the availability of drive letters: the primary partition is assigned to Drive C: (unless you have more than two floppy drives), and the logical drives get letters from D: through Z:. By my calculations, with all 24 hard drive letters assigned, the limit is 768MB. -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Wednesday, February 26, 2003 8:39 AM To: cctalk(a)classiccmp.org Subject: Re: SCSI cards --- Geoff Reed <geoffr(a)zipcon.net> wrote: It does. I have a PS/2 Model 30 (ISA) with a 50MB RLL drive replacing the original IBM IDE-ish drive. Two partitions under MS-DOS 3.11, one 30MB, one 20MB. The problem is that there is a small number of partitions possible (I don't recall if FDISK works the same way under 3.x as it did later), certainly no more than 4 primary partitions. DOS 4.x came out (as bad as it was) before 200MB drives were common. By the time "everybody" was buying "larger" drives, DOS 5.0 was out, solving several problems with historical baggage. Hmm... I would expect you'd need a Venix driver for it. If you _really_ wanted a challenge, you could port Minix to the Rainbow. Sources are available. Writing a Minix driver for the FDC might be interesting (not sure how much suitable documentation exists). -ethan