8" Soft Sectored Diskette
8" Hard Sectored Diskette
8" Single-sided Diskette
8" diskettes. Elephant brand DSDD soft sectored diskette,
and a Data General hard sectored diskette. The hard sectored diskette
has an index hole for each sector on the track, while the soft sectored
diskette has a single index hole. 8" diskettes have a write-enable
notch, which must be covered in order to write to the diskette.
The index hole on double-sided diskettes is displaced farther to the
right than on single-sided diskettes. Capacity for 8" diskettes varied
between systems, but was typically 500KB and 1MB for double density,
single and double sided.
5-1/4" Single-sided Diskette
5-1/4" Double-sided Diskette
8" and 5-1/4" Comparison
5-1/4" diskettes, double-density, single and double-sided. These diskettes
have a write-protect notch, which is covered to prevent writing
to the diskette. Single and double-density diskettes tend to have a
center reinforcement ring, while high-density (1.2MB) diskettes usually
do not. Single-sided, double-density diskettes typically held around
180KB while double-sided held 360KB, depending on the formatting.
3-1/2" 720KB Diskette
3-1/2" 1.44MB Diskette
3-1/2" diskettes, double-sided. The 720KB diskettes have a single
write-protect hole, which is covered to allow writing. The 1.44MB
diskettes have a second hole on the other side to indicate their
higher capacity to the drive.
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Last updated on
Tuesday, July 22, 2014