Diskette Media Problems - IBM 5280 Technical Newsletter
Distributed data system / programmable data station
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Also See for 5280:
- Manual (292 pages) ,
- Programmer's manual (187 pages) ,
- User's setup manual (169 pages)
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963
DISKETTE MEDIA PROBLEMS
Conditions. that affect the quality of the diskette are:
• A dent, scratch, crease, or fingerprint causes errors on
the same sectors, usually across tracks that are next to
each other ..
• A larger center hole causes errors on sectors that are
on opposite sides of the center hole. (Example:
sectors 01 and 15 or sectors 06 and 19).
• Fibers from the diskette cover cause random errors.
To look for visible damage:
1.
Align the index hole in the diskette with the hole
in the diskette cover.
2.
Use the following diskette figure to locate the
physical sectors on the diskette. This figure shows
a diskette 20 with 26 sectors and sequential
sector sequence numbers. Sector 01 always has
the same physical locations on the diskette
regardless of the sector size or the sector
s~quence
numbering.
2D diskette with 26 sectors per track.
190
Rotation
Diskette
Index Gap
. 963
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