3B2 Floppy Drive
Randy_Davis
rjd at occrsh.ATT.COM
Tue Jan 31 07:24:37 AEST 1989
In article <1037 at vsi.COM> friedl at vsi.COM (Stephen J. Friedl) writes:
|In article <581 at mccc.UUCP>, pjh at mccc.UUCP (Pete Holsberg) writes:
|>
|> Is /dev/rdiskette on a 3B2/400 a 720K device, a 1.4M device, or a 1.2M device?
|
|
|Let's work it out:
|
| 80 tracks 9 blocks 2 tracks 512 bytes 737280 bytes
| --------- * -------- * -------- * --------- = ------------
| drive track cylinder block drive
|
|
|So, it's 720k (but you only get to use 79 tracks...)
|
| Steve
Well, to be exact, its 728,064 bytes, easily verified by doing a dd from
either raw or block floppy device (with a formatted disk in the drive and the
door closed) into a file.
Randy Davis UUCP: ...(att!)ocrjd!randy
...(att!)occrsh!rjd
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