dittman@skbat.csc.ti.com (Eric Dittman) (05/05/91)
My Mac IIfx has two floppies. d0 (the one one the right) is an FDHD drive,
and d1 is an 800K drive. A/UX 2.0 and 2.0.1 both say d1 is a 400K drive and
is therefore unusable. Why is this?
--
Eric Dittman
Texas Instruments - Component Test Facility
dittman@skitzo.csc.ti.com
dittman@skbat.csc.ti.com
Disclaimer: I don't speak for Texas Instruments or the Component Test
Facility. I don't even speak for myself.chn@lanl.gov (Charles Neil) (05/05/91)
In article <1991May5.011113.462@skbat.csc.ti.com>, dittman@skbat.csc.ti.com (Eric Dittman) writes: > My Mac IIfx has two floppies. d0 (the one one the right) is an FDHD drive, > and d1 is an 800K drive. A/UX 2.0 and 2.0.1 both say d1 is a 400K drive and > is therefore unusable. Why is this? > -- > Eric Dittman > Texas Instruments - Component Test Facility > dittman@skitzo.csc.ti.com > dittman@skbat.csc.ti.com I have the same hardware setup and the same floppy problem. On the Mac side of A/UX, if I insert a previously-formatted 800K floppy, it works ok. But if I insert an unformatted floppy I get the single-sided dialog. On the UNIX side of A/UX, newfs won't work, but I can format and create an 800K file system using diskformat and /etc/fs/ufs/mkfs directly. -- -Charlie Neil (chn@lanl.gov) Los Alamos National Laboratory (505) 665-0978
rick@crowbar.aux.apple.com (Rick Auricchio) (05/08/91)
dittman@skbat.csc.ti.com (Eric Dittman) writes: >My Mac IIfx has two floppies. d0 (the one one the right) is an FDHD drive, >and d1 is an 800K drive. A/UX 2.0 and 2.0.1 both say d1 is a 400K drive and >is therefore unusable. Why is this? Two bugs are at work here, but they're ONLY ON THE IIfx. 1) On a Mac IIfx, the driver incorrectly identifies the drive as a 400K drive, and claims it's unusable since 400K drive hardware isn't supported on the Mac II series systems. If you insert a blank floppy, however, you CAN format it, but only as a 400K single-sided floppy. Thus the drive is still usable as a 400K drive, to a certain extent. 2) A second bug allows you to correctly read and write 800K floppies, provided they've already got data on them (i.e. you don't have to format them). This "loophole" shouldn't exist, but rest assured the I/O is getting done correctly anyway. Conclusion: You can still read/write existing 800K floppies even though the driver says you can't. The future fix will be to properly report the drive as 800K and format floppies appropriately. -- -- Rick Auricchio rick@apple.COM Mooney N894AR (408) 974-4227 Apple Computer Inc, A/UX Engineering,10300 Bubb Rd, MS 50-UX Cupertino CA 95014 Work is for people who don't know how to fly. My opinion is my own. My employer? They use a windsock and a fire extinguisher.