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AHB(4) Kernel Interfaces Manual AHB(4) NAME ahb -- Adaptec EISA SCSI host adapter driver SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: device scbus device ahb Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): ahb_load="YES" DESCRIPTION This driver provides access to the SCSI bus connected to an Adaptec AHA-174X host adapters in "enhanced" mode. Tagged queueing and syn- chronous SCSI transfers are supported. HARDWARE The ahb driver supports the following SCSI host adapters: • Adaptec AHA-1740 • Adaptec AHA-1742 • Adaptec AHA-1740A • Adaptec AHA-1742A CAVEATS The Adaptec 174X is very sensitive to SCSI bus termination and cable length. It may also have difficulties operating with some modern de- vices that, due to their speed, expose timing problems in the con- troller. There are no known mechanisms for working around device in- compatibilities of this nature. SEE ALSO aha(4), ahc(4), aic(4), cd(4), da(4), sa(4), scsi(4) AUTHORS The ahb driver was written by Justin T. Gibbs. FreeBSD 7.0 July 4, 2004 AHB(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | CAVEATS | SEE ALSO | AUTHORS
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