Reserved cylinder for SCSI device write back cache

Details Reserved cylinder for SCSI device write back cache Reserved cylinder for SCSI device write back cache

1995-06-05

1998-05-05

Auve, Glenn A.

39575008, G06F 130

Patent

active

057488746

ABSTRACT:
A disk drive in a computer system is equipped with a power storage unit that supplies power to the drive controller when there is a system power interruption, such as a powerdown or a power failure. Once the controller is notified that system power has been interrupted, it will immediately initiate a seek to a reserved location in the disk drive and store the contents of the cache memory at the reserved location. After power has been restored to the system, the controller can load the contents of the reserved cylinders back to the cache memory and complete the pending write operations by writing all of the data items in the cache to their respective final locations in the drive. The present invention has the advantage of requiring a very small amount of power to operate the controller beyond the interruption of system power, since it takes much less power to complete only one write operation of the cache contents to the reserved location, rather than completing the plurality of pending write operations for all the data items in the cache to locations scattered throughout the disk drive.

REFERENCES:
patent: 4458307 (1984-07-01), McAnlis et al.
patent: 5204963 (1993-04-01), Noya et al.
patent: 5379435 (1995-01-01), Hanaoka
patent: 5396637 (1995-03-01), Harwell et al.
patent: 5519831 (1996-05-01), Holzhammer
patent: 5524203 (1996-06-01), Abe
patent: 5586334 (1996-12-01), Miyazaki et al.

Affiliated with

Also associated with

Rating

Reserved cylinder for SCSI device write back cache does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reserved cylinder for SCSI device write back cache, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reserved cylinder for SCSI device write back cache will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-65885