aha by h3m4n


									AHA (4)                                    BSD Kernel Interfaces Manual                                        AHA (4)

    aha — Adaptec SCSI host adapter driver

    To compile this driver into the kernel, place the following lines in your kernel configuration file:
              device scbus
              device aha
       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
       In /boot/device.hints:

    This driver provides access to the SCSI bus connected to the Adaptec AHA-154x and AHA-1640 SCSI host
    adapters. x is 0 for controllers without a floppy drive and 2 for controllers that have them. For optimum per-
    formance, Adaptec AHA-174x controllers should be configured in enhanced mode and attached via the
    ahb(4) driver.
       One device hint entry for every card to be attached by the system is required. Specific values for the port
       address, IRQ, and DRQ may be specified. If wildcard values are used, the driver will query the device for its
       current settings and use those. If the port address is a wildcard, the driver consults an internal table of possi-
       ble port address locations and attaches to the first unattached card it finds. The possible port addresses for
       this card are 0x330, 0x334, 0x230, 0x234, 0x130, and 0x134.
       The AHA-1640 is an MCA bus card. Since the MCA bus is a self-identifying bus, no setting of hints is

    The aha driver supports the following SCSI host adapters:
       •   Adaptec AHA-154xB
       •   Adaptec AHA-154xC
       •   Adaptec AHA-154xCF
       •   Adaptec AHA-154xCP
       •   Adaptec AHA-1640
       •   Adaptec AHA-174x in 154x emulation mode
       •   DTC 3290 SCSI controller in 1542 emulation mode
       •   Tekram SCSI controllers in 154x emulation mode

     ahb(4), ahc(4), aic(4), cd(4), da(4), sa(4), scsi(4)

    The aha driver was ported by M. Warner Losh from the bt driver written by Justin T. Gibbs.

       The AHA-154xA card does not support residuals on data transfers. As a result, this card is no longer sup-
       There have been some reports that the AHA-154xB does not work well under heavy load.

BSD                                                  July 4, 2004                                                      1
AHA (4)                                  BSD Kernel Interfaces Manual                                    AHA (4)

      The AHA-154xCP is a plug and play controller. However, its resources are set using the on-board BIOS and
      cannot be moved. Failures to attached for this card are often caused when the resources set in the BIOS con-

BSD                                               July 4, 2004                                                  2

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