Forced backhitch for speed matching in a multi-speed tape drive

Details Forced backhitch for speed matching in a multi-speed tape drive Forced backhitch for speed matching in a multi-speed tape drive

2005-10-25

2005-10-25

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

Reexamination Certificate

active

06958878

ABSTRACT:
In a magnetic tape drive having a plurality of stepped operational speeds, data storage logic estimates, from the effective data fill rate for a data buffer and the drive data write rate, the time cost to continue to operate the magnetic tape drive at the current stepped operational speed from a target to the next end of wrap; estimates, the time cost to force a backhitch of the magnetic tape data storage media and change the stepped operational speed to a higher stepped operational speed and operate the magnetic tape drive at the higher stepped operational speed to the next end of wrap; and determines the lesser time cost.

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