Hard disk cache for CD-ROM and other slow access time devices

Details Hard disk cache for CD-ROM and other slow access time devices Hard disk cache for CD-ROM and other slow access time devices

1995-08-07

1999-03-16

Voeltz, Emanuel T.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

395842, 395843, 395847, 711117, 711118, G06F 1300, G06F 1208

Patent

active

058840931

ABSTRACT:
A controller system for a CD-ROM drive or other slow access device such as a magneto-optical device using a conventional hard disk drive as a cache memory. In some embodiments, the hard disk cache is partitioned to use a portion thereof to clone the most often used data blocks on the CD-ROM disk such as the directory/file allocation table, while the balance of the hard disk is used to cache some or all of the balance of the CD-ROM disk using conventional cache memory least recently used rules. Three bus controllers for the host computer, CD-ROM drive and the hard disk cache are controlled by a microprocessor which runs a control program that implements the cloning and cache rules. The three bus controllers are connected by a DMA bus for faster transfer of data. The microprocessor controls the directions of the DMA transfers by data written to a control register.

REFERENCES:
patent: 5029125 (1991-07-01), Sciupac
patent: 5218685 (1993-06-01), Jones
patent: 5247618 (1993-09-01), Davis et al.
patent: 5257367 (1993-10-01), Goodlander et al.
patent: 5261072 (1993-11-01), Siegel
patent: 5261872 (1993-11-01), Siegel
patent: 5293590 (1994-03-01), Keener et al.
patent: 5297258 (1994-03-01), Hale et al.
patent: 5353460 (1994-10-01), Lautzenheiser
patent: 5371861 (1994-12-01), Keener et al.

Affiliated with

Also associated with

Rating

Hard disk cache for CD-ROM and other slow access time devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hard disk cache for CD-ROM and other slow access time devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard disk cache for CD-ROM and other slow access time devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-825947