Apple double-density 3 1/2" disk
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The '''Apple double-density 3 1/2" disk''' was used on the Macintosh (with the [[MFS]] file system) and the Apple II line (with the [[ProDOS file system]]). It was a disk format with 80 tracks per side and a variable 8 to 12 sectors per track, with each sector storing 512 bytes. When used in single-sided mode, its capacity was 400 kilobytes; this became 800 in double-sided mode. Data was encoded using a form of [[GCR encoding]]. The drive ran at constant linear velocity (CLV), meaning that the RPM rate varied depending on which track was being read. | The '''Apple double-density 3 1/2" disk''' was used on the Macintosh (with the [[MFS]] file system) and the Apple II line (with the [[ProDOS file system]]). It was a disk format with 80 tracks per side and a variable 8 to 12 sectors per track, with each sector storing 512 bytes. When used in single-sided mode, its capacity was 400 kilobytes; this became 800 in double-sided mode. Data was encoded using a form of [[GCR encoding]]. The drive ran at constant linear velocity (CLV), meaning that the RPM rate varied depending on which track was being read. | ||
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| + | == Links == | ||
| + | * [http://retro.icequake.net/apple2pc.html Apple-to-PC disk transfer info] | ||
[[Category:Apple II series]] | [[Category:Apple II series]] | ||
[[Category:Macintosh]] | [[Category:Macintosh]] | ||
Revision as of 15:39, 8 May 2013
The Apple double-density 3 1/2" disk was used on the Macintosh (with the MFS file system) and the Apple II line (with the ProDOS file system). It was a disk format with 80 tracks per side and a variable 8 to 12 sectors per track, with each sector storing 512 bytes. When used in single-sided mode, its capacity was 400 kilobytes; this became 800 in double-sided mode. Data was encoded using a form of GCR encoding. The drive ran at constant linear velocity (CLV), meaning that the RPM rate varied depending on which track was being read.
