Fragment 14 of 72 · drawer 02
Fragmented read movement log
A fictional trace that translates a scattered logical file into the repeated mechanical travel needed to retrieve it.
- Accession
- MW-F-014
- Representative period
- Reconstructed disk access, 1990s
- Drawer
- Logs & traces
- Certainty
- moderate
Fragmented read movement log
Reconstructed disk access, 1990s
Observed surface
00.000 request FILE-A / directory entry resolved
00.118 head moves 06 tracks outward / first extent
00.506 rotational wait / requested sector passes under head
Implied procedure
01.024 next extent: 19 tracks inward
01.488 next extent: 11 tracks outward
02.105 repeat read after check mismatch
Interpretive residue
03.442 final extent delivered / six physical movements for one logical file
The file appeared continuous to software and discontinuous to the mechanism.
Accountability record
Evidence beneath the reconstruction.
These institutional sources support the mechanism or historical practice interpreted above. They do not contain this reconstructed record, its wording, or its invented values.
- IBM Support · technical reference 1.44 MB 3.5-inch SlimLine diskette drive specifications A vendor specification used for the representative 300 rpm mechanism; one revolution takes 200 ms, making half a revolution 100 ms. Open institutional record ↗
- Microsoft Learn · 2024 defrag command reference Current documentation for locating and consolidating file fragments, analysis reports and media-aware optimisation. Open institutional record ↗