Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1997-12-15
2000-03-28
Hindi, Nabil
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 75, G11B 555
Patent
active
060439505
ABSTRACT:
An apparatus implements a method of controlling a disk drive during initial stages of a wake-up mode when input of a command to the disk drive occurs during a sleep mode. Immediately upon receipt of a command input to a microprocessor controller (21) of the disk drive during sleep mode, power is restored to circuits (except for the spindle motor driver circuit) which were disabled during sleep mode. Then, a discrimination is made whether the input command is for picking up data from the disk and driving the disk to process the data. The discrimination is made by comparing the input command with a predetermined reference command stored in a memory (22) associated with the microprocessor. If the input command is not for driving the disk, the command is performed immediately. On the other hand, if the input command is determined to be for driving the disk, the command is performed only after power is applied to the spindle motor driver circuit (24) and the microprocessor controller (21) stands by for a predetermined time period. The stand by time period is to allow rotational speed of the disk to stabilize after energizing the motor driver to spin the disk. Accordingly, malfunctions caused by instability of the disk drive controller in the initial wake-up mode are be prevented.
REFERENCES:
patent: 4918743 (1990-04-01), Tsuyuguchi
patent: 5001578 (1991-03-01), Yamauchi
patent: 5099368 (1992-03-01), Okamura
patent: 5157560 (1992-10-01), Kanda et al.
patent: 5239652 (1993-08-01), Seibert et al.
patent: 5345347 (1994-09-01), Hopkins et al.
patent: 5381279 (1995-01-01), Dunn
patent: 5452277 (1995-09-01), Bajorek et al.
patent: 5488274 (1996-01-01), Satoh
patent: 5589996 (1996-12-01), Patrick et al.
patent: 5671099 (1997-09-01), Ishii et al.
patent: 5801894 (1998-09-01), Boutaghou et al.
Hindi Nabil
Samsung Electronics Co,. Ltd.
LandOfFree
Apparatus of controlling disk drive during initial stages of wak does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus of controlling disk drive during initial stages of wak, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus of controlling disk drive during initial stages of wak will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1331247