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    To: linux-scsi@vger.kernel.org
    Subject:
    Date: Thu, 02 Nov 2000 11:03:37 -0700
    From: "Justin T. Gibbs" <gibbs@aslan>

    Adaptec SCSI HBA device driver for the Linux Operating System
    Justin T. Gibbs
    Adaptec Inc.
    gibbs@btc.adaptec.com
    2000/11/02


    Introduction:

    In an effort to increase its level of support for the Linux community,
    Adaptec Inc. has committed to enhancing and maintaining the community
    developed driver for Adaptec AIC78XX SCSI host bus adapters. This
    package represents the first public Alpha release of the Adaptec
    sponsored driver. As this is an Alpha release:

    THIS DRIVER SHOULD NOT BE DEPLOYED EXCEPT IN A TESTING
    ENVIRONMENT WHERE SYSTEM CORRUPTION, DATA LOSS, AND SYSTEM
    INSTABILITY CAN BE TOLERATED.

    This driver is under active development. New versions may
    be found at:

    http://people.FreeBSD.org/~gibbs/linux/

    Supported Hardware:

    All Adaptec Fast, Ultra, Ultra2 and Ultra160/m PCI adapters
    are supported by this release. This includes, but it not
    limited to the 2930, 2940, 2940UW, 2950U2W, 3950U2W, 19160,
    29160, 39160, and motherboard versions of the
    aic7850/55/59/60/70/80/90/91/92/67/97/99.

    New Features:

    o Adaptive tagged queuing algorithm. This new algorithm
    will fine tune the queue depth for a particular device.
    For devices with a fixed depth, the driver will eventually
    determine that depth and from that point forward, avoid
    queuing more commands than the device can handle. For
    devices that report queue full for temporary resource
    shortages, the driver will throttle back and slowly
    attempt to increase the queue depth over time. Tagged
    queuing is enabled by default.

    o U160 is now supported on all U160 devices. The Adaptec
    driver firmware issue that rendered U160 speeds unreliable
    on some Quantum drives has been resolved.

    ERRATA:
    o Not all KERNEL_VERSION defines are completely correct.
    Some assistance from the community in refining these
    values would be appreciated. The current values
    were determined based on porting efforts to 2.2.14,
    2.3.99-pre9, and 2.4.0-test10, but an exhaustive search
    of exactly when certain kernel interfaces changed was not
    performed.

    o The VL/EISA attachment has not been tested.

    o The driver has not been audited for big endian issues,
    and is not guaranteed to work on big endian systems.
    The driver is 64bit clean.

    o Domain Validation is not yet implemented.

    o Several of the historical driver load options (for modules
    or via LILO) are not yet honored.

    o /proc support is not yet implemented.

    Patching your kernel:

    cd /usr/src/linux
    tar xvfz aic7xxx.src.tar.gz
    patch -p1 < 2.4.0.diffs

    Only diffs for 2.4.0 are currently provided. As more community
    testing is completed, patches for additional kernel revisions will
    be made available. Driver update disks will be provided as soon
    as the driver goes into Beta testing.

    ------- End of Blind-Carbon-Copy
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