best hard drive speed

Discussion in 'Professional Video Production' started by Roy, Oct 9, 2004.

  1. Roy

    Roy Guest

    Have just purchased a Sony VAOI A150 laptop principally for direct DV
    capture, (maybe using DV Rack).
    Comes with a 4200 rpm 80 gig hard drive.

    AFter market replacement hard drives come in 80 gig 5400 rpm, and 60 gig
    7200 rpm.

    Presumably the highest spindle speed would assure minimum drop outs, but
    does anyone have any thoughts about 4200? Will it do, or should I look 'up'!
     
    Roy, Oct 9, 2004
    #1
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  2. Roy

    david.mccall Guest

    It isn't quite that simple. You won't likely get "drop outs" on a hard
    drive, but you
    can drop frames while capturing or playing out video. Dropouts are caused by
    contamination on the tape getting hung up in the VCR heads, or even defects
    in
    the actual tape. DVcam is less susceptible to dropouts, as compared to
    consumer
    DV, because the higher tape speed allows for a wider track, and a larger
    head gap.
    However people haven't been complaining much about dropouts even with the
    consumer versions, except for very early on when the format was still new.

    Dropped frames are a symptom of the system not being fast enough to keep up
    with the frame rate. This can be because the CPU is to slow, or being bogged
    down with other task, or the drive not being fast enough to keep up.
    Traditional
    wisdom says that faster spindle speed makes a for a faster drive, but
    buffers,
    head count, and the number of platters will also influence a drive's speed.
    Higher
    RPM drives will often draw more power and be noisier too, but even that is
    not
    a constant.

    If you don't need total portability, then an external USB-2 drive is a good
    option.
    That way you can capture through 1394, and access the disk through USB. It
    works pretty well. Prepackaged external drives often come preformatted
    with a "fat 32" file format. This is fine, except that you have a file size
    limitation
    to consider. I hope someone will correct me if I am wrong, but I think that
    limit is
    around 4 gigabytes. DV uses up about 13 gigs an hour, so a 4 gig file would
    be
    just shy of 20 minutes. OK for raw footage, and short projects, but not so
    hot for
    recording TV shows or events. If you need longer running times, then just
    re-format
    the drive to NTFS.

    David
     
    david.mccall, Oct 9, 2004
    #2
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  3. Roy

    Mike Kujbida Guest


    The faster the drive, the less chance for errors of any kind. If you can
    afford it, go for the 7200 rpm. You won't be disappointed.

    Mike
     
    Mike Kujbida, Oct 9, 2004
    #3
  4. You can check maximum transfer speeds and latency using websites like
    tomshardware.com and anandtech.com

    As someone else suggested, external hard drives are highly regarded for
    this sort of thing. They come in gargantuan capacities and are very
    versatile. A plug-and-play hard drive is just what you need.
     
    Richard Cavell, Oct 10, 2004
    #4
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