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- From: toddpw@cco.caltech.edu (Todd P. Whitesel)
- Newsgroups: comp.sys.apple2
- Subject: Re: Flopticals...any successful usage out there?
- Message-ID: <1992Aug29.081112.15522@cco.caltech.edu>
- Date: 29 Aug 92 08:11:12 GMT
- References: <Btpy43.Gwv@world.std.com>
- Sender: news@cco.caltech.edu
- Organization: California Institute of Technology, Pasadena
- Lines: 65
- Nntp-Posting-Host: punisher
-
- lucifer@world.std.com (Kevin S Green) writes:
-
- >I was wondering if anyone out there has had any success in
- >using the new floptical drives (any capacity) that have
- >been introduced in the past few years. I know, via a
- >report in GS+, that Applied Eng. is planning a floptical
- >drive for the // line but I would like to know of actual
- >use of other makers' drives.
-
- [ Y'know, I think I need to make a Floptical FAQ or something... ]
-
- I seem to be the only person who actually has one of these things, so here's
- the scoop (in brief this time):
-
- There are three major types of "floptical" mechanisms out there. You can find
- ads for all three in practically any Mac magazine. They are:
- 1. 5 1/4" cartridges like the Next's Magneto Optical. These are not
- really worth getting any more. Even Next is beginning to abandon them.
- 2. 3.5" cartridges that hold 128 megs. These drives have been ISO
- standardized, and they (or some evolution of them) are probably going to be
- the next generation in removable media. However, drives still cost $1500 or so
- so I don't consider them an option for most mere mortals.
- 3. 3.5" floppies with optically engraved guide tracks that allow 20 mb
- on one diskette (at $25 a disk, that's $1.25 a megabyte). These mechanisms can
- also be backwards compatible with 720K and 1.44meg floppy formats. They do not
- support the Apple specific 800K format. These drives cost in the $600 range,
- which makes them much more reasonable an option.
-
- I bought a drive of the third variety from Tulin. It was about $679 for the
- drive, plus a Ramfast, cable, and one floppy of each density: 720K, 1.44meg,
- and 20meg, according to the latest Incider. This price has come down from
- when I bought mine. The mechanism used is an Insite I325VM, which supports
- the SCSI Common Command Set. Unfortunately it plays rather loosely with the
- time it takes to do certain things -- the Apple DMA SCSI and early Ramfasts
- cannot successfully mount a disk in the Insite mechanism because they retry
- a "what media have you got" request before the Insite is finished looking at
- the disk to find out, and whammo you have an infinite loop until you get bored
- and pop the disk back out with the manual eject.
-
- Basically you need a ramfast with rom 2.01 or later to use the Tulin drive.
- CVT does not specifically support the drive yet (but enough people have
- pestered them so Drew said on Genie that he's looking into it, to get them
- off his back). Somewhere after 2.00p but by 2.01e CVT changed something so
- that the infinite retry doesn't happen when you insert a disk.
-
- But all is not rosy yet. 20 meg media more or less works as advertised, but
- 1.44meg floppies have problems that CVT needs to iron out by experimenting
- with one of the drives. There are really only two problems. First, and Tulin
- denies this so maybe I have a flaky mechanism, when you format a 1.44 meg
- disk the Ramfast crashes when the format completes and you have to power
- cycle -- but after that it's fine and you can partition the disk and use it.
- Did I say partition? Yep, that's problem number two. The ramfast currently
- insists on a SCSI partition map (16k at the front of the disk) before it will
- even let GS/OS see the disk -- this is a real pain because no other 1.44 meg
- floppy system (including the FDHD) will recognize the file system on a floppy
- that has been partitioned! I have explained this to CVT on Genie first bluntly,
- then diplomatically, so they are aware of the problem. In fact Drew made the
- comment "I'm surprised you haven't disassembled the ROM and fixed it yourself!"
- because the necessary code is already present, for CD-ROMs.
-
- Other than that, it pretty much works. I haven't tried 720K disks (I never run
- into them) so I can't report anything about them.
-
- Todd Whitesel
- toddpw @ cco.caltech.edu
-