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Conference stkhlm::magtape

Title:MAGNETIC TAPEDRIVES
Moderator:STKHLM::GJOHNSSON
Created:Mon Sep 21 1987
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3775
Total number of notes:13147

3641.0. "Tape Mark Directories" by JULIET::RIFKIN_DA (David Rifkin) Thu Jan 30 1997 04:59

    The product description for the TZ88X refers to "tape mark directories
    to minimize data access time".
    
    Can you explain what this means and whether any of our tape software
    products take advantage of it ??
    
    Thx,
    
    Dave Rifkin
    
T.RTitleUserPersonal
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3641.1As far as I know..SUBSYS::TRANStraight <Left> Hitter..Fri Jan 31 1997 02:5410
    
    It keeps track of where tape marks are, so when you space filemarks
    the drive will try to get there as fast as it can (skip tracks).
    
    New MKDriver on OVMS 7.1 claims to use skip filemark rather than skip
    records as the older method.
    
    On SW application, I'll leave that reponse to SW group.
    
    T.
3641.2COOKIE::FROEHLINLet's RAID the Internet!Fri Jan 31 1997 21:004
    BACKUP and COPY on OpenVMS V7.1 use skip filemark where possible.
    See the V7.1 Release Notes for details.
    
    Guenther