Pre-read control method for magnetic tape and apparatus for perf

Details Pre-read control method for magnetic tape and apparatus for perf Pre-read control method for magnetic tape and apparatus for perf

1994-10-07

1997-03-04

Harrell, Robert B.

G06F 306

Patent

active

056088752

ABSTRACT:
Magnetic tape pre-read method for using the buffer for pre-read efficiently is provided. This method is executed in a pre-read control unit provided with a buffer margin memory portion and a counter. In this method, the size of data block read from a magnetic tape and the contents of the buffer margin memory portion is compared. When the size of the data block is larger than the contents of the buffer margin memory portion, the counter is incremented. If the count of the counter reaches a predetermined value as a result of the increment, the maximum value of the seize of the data blocks read out in the past is set in the buffer margin memory portion. The count of the counter does not reach the predetermined value unless large blocks appear successively. Therefore, even if large data blocks appear sporadically, the contents of the buffer margin memory portion is maintained.

REFERENCES:
patent: 3772657 (1973-11-01), Marsalka et al.
patent: 3836891 (1974-09-01), McDaniel
patent: 5327535 (1994-07-01), Ogata et al.

Affiliated with

Also associated with

Rating

Pre-read control method for magnetic tape and apparatus for perf does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pre-read control method for magnetic tape and apparatus for perf, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-read control method for magnetic tape and apparatus for perf will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2154344