adst70 -- Adaptec 66/33 MHz, 64/32-bit PCI Ultra160 SCSI host adapter subsystem


This DDI8 driver supports the Adaptec family of Ultra160 SCSI products for the PCI bus. This family supports Ultra160 SCSI devices which execute data transfers at up to 160 MB/second (twice the speed of Ultra2 Adaptec SCSI products) and support full backward compatibility with existing Ultra2, fast and Ultra SCSI devices. These products also provide 66 MHz, 64-bit PCI operation needed for server environments or standard 33 MHz, 32-bit PCI operation. All of Adaptec's Ultra160 SCSI Cards support large memory servers with greater than 4GB of RAM.

This driver support host adapters such as the single channel Adaptec SCSI Card 29160, 29160N, and 29160LP, the dual channel Adaptec SCSI Card 39160, and motherboard implementations using the AIC-7899 and AIC-7892 Ultra160 SCSI chips. Please see the Compatible Hardware Web Pages for the current certification status of specific device models on UnixWare 7 releases.

For support of Adaptec's family of Fast and Ultra SCSI products for the PCI bus, please refer to the adsl(7) manual page. This includes host adapters such as the AHA-294x, AHA-294xW, AHA-294xUW, AHA-2940UW Pro, AHA-2940AU, AHA-394x, AHA-394xW, AHA-394xUW, AHA-394xAUWD, and AHA-4944UW, as well as any motherboard using the AIC-7850, AIC-7855, AIC-7860, AIC-7870, AIC-7880, and AIC-7895 SCSI chips.

This driver complies with the Storage Device Interface (SDI), enabling SDI-compliant target drivers (such as sd01 and st01) to communicate on the SCSI bus with target controllers and logical units. This allows normal access to mass-storage devices using standard system interfaces and filesystems.

It is also possible for an application to access the SCSI bus subsystem directly by using the pass-through interface. See pt_open(3X). Exercise extreme caution when using the pass-through interface. It is possible to interfere with normal system I/O and cause hangs if pass-through is used to an active device. Pass-through should only be used to a device that is otherwise quiescent.

The Adaptec PCI host adapter driver honors the command timeout values as specified in the scb structure; see the scb(D4sdi) manual page. A software watchdog timer enforces the processing time limit. When the watchdog timer detects a job that has exceeded its processing time limit, it attempts to abort the job with a SCSI Job Abort Message. The driver also enforces a time limit on the abort process, thereby ensuring that jobs that ``time out'' are reported to the sending SDI Target Driver whether or not the abort succeeds.




adsa(7), adsb(7), adsc(7), adse(7), adsl(7), adss(7), ioctl(2), scb(D4sdi), sc01(7), sd01(7), sdi(7), st01(7), sw01(7)
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004