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Caution: This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.


Driver for Adaptec AIC-7770 based SCSI adapters (QNX Neutrino)

Note: You must be root to start this driver.


devb-aha7 [cam option[,option]...]
          [cdrom option[,option]...]
          [disk option[,option]...]
          [optical option[,option]...]
          [aha7 option[,option]...]
          [blk option[,option]...] &


Note: Use commas (,) to separate the options. You can put the cam, cdrom, disk, optical, aha7, and blk groups of options in any order.

cam options

Enable Logical Unit Number (LUN) scan for the devices specified in mask. The mask is a hex bitmask specifying which IDs to scan for; the default is 0x00.
Be quiet: don't display any information on startup.
Be verbose: display full information about SCSI units (devices) on startup.

cdrom options

The cdrom options control the driver's interface to cam-cdrom.so. If specified, they must follow the cdrom keyword.

disk options

The disk options control the driver's interface to cam-disk.so. If specified, they must follow the disk keyword.

optical options

The optical options control the driver's interface to cam-optical.so. If specified, they must follow the optical keyword.

aha7 options

The aha7 options control the drivers interface to the AHA 7 series controllers. If you've installed multiple controllers, you can repeat these options for each controller. Remember, however, to specify the aha7 keyword before each controller's set of options.

The I/O port of the interface. By default, it's detected automatically.
Assume that the controller is using this interrupt. By default, the driver queries the controller for this value.
Don't reset the SCSI bus.

blk options

The blk options control io-blk.so. If specified, they must follow the blk keyword.


The devb-aha7 driver is for SCSI adapters based on the Adaptec AIC-7770 chips. Controllers supported by this driver include, but aren't necessarily limited to:

Manufacturer Controller
Adaptec AIC-7770
Adaptec AHA-2740/2742
Adaptec AHA-2740T/2742T
Adaptec AHA-2740W/2742W
Adaptec AHA-2840A/2842A

The devb-aha7 driver scans for controllers in the command-line sequence given by the aha7 ioport option. If no ioport option is given, the driver scans for controllers at the following hex addresses, in order:

The driver performs a scan, looking for installed units. All targets are scanned (0 to 7) and for each target, each LUN (Logical Unit Number) is scanned (0 to 7). Devices are numbered starting from 0, and each type of device is numbered separately.

The devb-aha7 driver closes its standard input, standard output and standard error immediately after completing its initializations. Error messages may be produced during the initialization phase and are written to standard error.


Assume an AHA 7 controller, and list all connected devices:

devb-aha7 &

Assume an AHA 7 controller with I/O port 1c00, but don't display a list of connected devices:

devb-aha7 cam quiet aha7 ioport=1c00 &


The devb-aha7 driver causes io-blk.so to adopt various block special devices under /dev. These devices are normally named hdn (or cdn for CD-ROMs), where n is the physical unit number of the device.

This driver could also require the following shared objects:

Binary Required
cam-cdrom.so For CD-ROM access
cam-disk.so For hard-disk access
libcam.so Always

Exit status:

The devb-aha7 driver terminates only if an error occurs during startup, or if it has successfully forked itself upon startup because it hadn't been initially started in the background.

The devb-aha7 driver wasn't started in the background and therefore forked itself. The original process terminated with a zero exit status, the forked process continued.
> 0
An error occurred during startup.


Unless overridden with the blk automount= option (see io-blk.so), devices are mounted as:

Device Mountpoint Filesystem type
/dev/hd0t77 /hd qnx4
/dev/cd0 /cd cd
/dev/hd0t6 /dos dos
/dev/hd0t11 /dos dos

While there's no limit to the size of a disk or partition, I/O (i.e. the lseek(), read() and write() functions) is currently limited to 2 gigabytes per partition (or disk). This I/O limit has no effect on the partition size for mounted filesystems.

Known supported functions include:

chmod(), chown(), close(), closedir(), creat(), devctl(), dup(), dup2(), fcntl(), fpathconf(), fstat(), lseek(), mkdir(), mkfifo(), mknod(), open(), opendir(), pathconf(), read(), readdir(), readlink(), rewinddir(), rmdir(), stat(), symlink(), unlink() (not supported for directories), utime(), write()

Note that certain calls (such as pipe(), as well as read() and write() on FIFOs) may require the pipe manager.

See also:


"Block-oriented drivers (devb-*)," "Common access method (cam-*)," and "Filesystem drivers (fs-*)" in the Utilities Summary

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