HDD - Sequential access patterns
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- When accessing data sequentially:
- the read head is placed on the first sector
- and data is read as the disk revolves.
- This implies that throughput depends on the RPM of the disk.
- which means data is read slower as we move to inner tracks (which
contain less sectors).
- For long sequential access - the initial seek time is negligible.
- Note: since moving the heads between tracks takes time, we can
store the sectors of inner tracks with an offset: