krohn@bae.bellcore.com (Eric Krohn) (04/27/91)
I've made numerous attempts to get a 96tpi floppy disk drive to work with my 7300, but to no avail. The first drive I tried is a Mitsubishi MF504A-308U -- a 1.4 MB drive for a PC AT strapped (I think correctly) to force it to "low" density mode (96tpi, 300rpm). I format it with iv -ivw /dev/fp020 /usr/lib/iv/FD96nl where FD96nl is a copy of FD10nl with sectors changed from 40 to 80. Iv formats the drives but fails on the surface check: Failed in Phase 3 - Surface Check: adding bad block on second write 880 iv: bad block 880 on device with no bad block table Repeated attempts produce errors on different block numbers -- most are 880 or higher, one was 704. If I format with FD10nl, it works fine but only uses half the floppy. Suspecting the floppy drive, I plugged in a Mitsubishi M4852 -- a 720KB drive that worked in my old Callan Unistar. On this drive, iv "succeeded" in formatting and surface checking, and I can copy data to the drive. However, when I read the floppy I get errors starting at logical block 440 -- suspiciously similar to the physical block 880 above. Now these errors are filling up my /usr/adm/errfile (I use the error daemon packaged with MGR instead of the stock one): Sat Apr 20 17:55:25 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8F00 Sat Apr 20 17:55:25 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8D00 Sat Apr 20 17:55:26 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8700 Sat Apr 20 17:55:26 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8500 Sat Apr 20 17:55:26 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8500 Sat Apr 20 17:55:26 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8700 Sat Apr 20 17:55:26 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8500 Sat Apr 20 17:55:27 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8D00 Sat Apr 20 17:55:27 1991: pid 0: #FDERR ST:8 TR:2E SR:3 DR:FFFFFFC0 DMACNT:FFFF DCRREG:F3 MCRREG:8D00 Sat Apr 20 17:55:27 1991: pid 0: :S:D::Unrecoverable floppy disk error What do these mean? Is my problem with the drive(s) or is my 7300 ill or incapable of using a 96tpi drive? I know others have done this okay. Help!