Early warning for boundary position in serpentine recording
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 28, 1999
Grant Date -
N/A
app pub date -
Jan 24, 1997
filing date -
Jan 26, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In serpentine recording on magnetic tape (32), a warning marker (CEW) is generated and recorded on tape in a write mode and is read in a read mode. The warning marker indicates that a head is approaching a boundary position on the tape at which the head must change tracks in order to continue recording or reading frames. The warning marker is preferably included in an auxiliary portion of at least some frames. In one embodiment, the warning marker has a value related to a number of frames that can yet be recorded on the track before the boundary position is encountered. Monitoring of the warning marker serves to apprise the drive of a potential need to cache data in anticipation of a change of track. Caching of data can occur either by sending a caching signal to the host, or can occur internally in the drive without taxing the drive's buffer. In the drive-internal caching, the relative speed between the tape and the head is adjusted in anticipation of the head being repositioned for a change of track.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully