Methods and apparatus for detecting whether a removable cartridg

Details Methods and apparatus for detecting whether a removable cartridg Methods and apparatus for detecting whether a removable cartridg

1994-11-10

1998-12-29

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

360137, 318254, 318430, 369 58, 369190, G11B 1518

Patent

active

058547193

ABSTRACT:
The presence of a disk cartridge in a disk drive is detected by obtaining a measure of the load on the spindle motor of the disk drive and comparing that measure to a threshold value. The measure of load on the spindle motor may comprise (i) the time the spindle motor takes to spin-up to its full operating speed, (ii) the time the spindle motor takes to coast down to its operating speed from a first speed in excess of the operating speed, (iii) the voltage applied across the coils of the spindle motor, or (iv) the current drawn by the spindle motor.

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