Helical scan method and apparatus for adjusting media speed to r

Details Helical scan method and apparatus for adjusting media speed to r Helical scan method and apparatus for adjusting media speed to r

1994-01-12

1996-07-09

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 745, G11B 1546, G11B 1548

Patent

active

055350682

ABSTRACT:
A helical scan system (10) determines whether a medium is a non-native formatted medium and controls operating parameters (e.g., tape speed) so that a non-native formatted medium can be read without resort to embedded servo information in the non-native medium. The helical scan system reads the medium in a manner to obtain format-indicative information therefrom, and then determines whether the medium is non-native formatted. If the medium is non-native formatted, a controller determines operating parameters required by the system to read the non-native formatted medium and generates signals corresponding to the required operating parameters. The medium is preferably read in a slow speed mode in order to obtain format-indicative information therefrom, and block header information obtained from the medium is analyzed to determine whether the medium is non-native formatted.

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