SCSI HVD PCI-X controller??

Discussion in 'Storage' started by Hiroshi, Sep 22, 2003.

  1. Hiroshi

    Hiroshi Guest

    Dear all,
    I'm looking for a SCSI controller to use with my IBM Magstar library.
    To control my Magstar library you've to use HVD (high voltage differential)
    SCSI controller, and not more usual LVD.
    A good one is the Adaptec AHA-2944UW (HVD), but it has a normal PCI (33mhz)
    In our server only 1 PCI-X (66Mhz, hot-swappable) slot is available.
    Could you help me??

    Thanks a lot
    Hiroshi, Sep 22, 2003
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  2. Hiroshi

    Malcolm Weir Guest

    I don't know of any HVD PCI-X adapters (Qlogic dropped their parallel
    SCSI line, which really leaves just Adaptec and LSI, who have
    32bit/33Mhz PCI, but that's about it).

    The problem is that HVD is limited to lower SCSI transfer rates
    (Ultra, certainly, but not U160 or U320 by any means), so there's
    little incentive to produce new silicon with a fast host bus and a
    slow(er) SCSI interface.

    This may seem a little odd, but I'd suggest that your best bet is to
    go with a PCI-X *LVD* adapter and something like a Paralan LVD-HVD

    Although this will probably cost more 8-(
    Malcolm Weir, Sep 22, 2003
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  3. Hiroshi

    Hiroshi Guest

    Thanks a lot to all!

    Probably IBM will replace our new LTO (HVD) library with a new (and a
    little bit cheaper) LTO LVD library

    Hiroshi, Sep 24, 2003
  4. Hiroshi

    Don Matthews Guest

    So, back to the original question ... why can't this gentleman stick his regular PCI 32bit/33 MHz card into a PCI-X slot? What's
    wrong with doing that? I'm guessing that the PCI-X bus he plugs into will then only run at 33 MHz, for one thing, but will it work
    or not?

    Don Matthews, Sep 25, 2003
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