Driver for BusLogic/Mylex Multimaster host adapters (QNX Neutrino)
|You must be root to start this driver.|
devb-btmm [cam option[,option]...] [cdrom option[,option]...] [disk option[,option]...] [optical option[,option]...] [btmm option[,option]...] [blk option[,option]...] &
|Use commas (,) to separate the options. You can put the cam, cdrom, disk, optical, btmm, and blk groups of options in any order.|
The cdrom options control the driver's interface to cam-cdrom.so. If specified, they must follow the cdrom keyword.
The disk options control the driver's interface to cam-disk.so. If specified, they must follow the disk keyword.
The optical options control the driver's interface to cam-optical.so. If specified, they must follow the optical keyword.
The btmm options control the drivers interface to the BusLogic/Mylex Multimaster series controllers. If you've installed multiple controllers, you can repeat these options for each controller. Remember, however, to specify the btmm keyword before each controller's set of options.
The blk options control io-blk.so. If specified, they must follow the blk keyword.
The devb-btmm driver is for the BusLogic/Mylex Multimaster and compatible SCSI controllers.
Controllers supported by this driver include, but aren't necessarily limited to:
|BT-440C||Bus master VL SCSI host adapter.|
|BT-445C||Bus master VL SCSI host adapter with floppy controller.|
|BT-542B||Bus master ISA SCSI host adapter with floppy controller.|
|BT-542D||Bus master ISA-to-Fast SCSI host adapter with floppy controller.|
|BT-545C||Bus master ISA SCSI host adapter with floppy controller.|
|BT-545S||Bus master ISA-to-Fast SCSI host adapter with floppy controller.|
|BT-646S||Bus master MCA SCSI host adapter.|
|BT-747S||Bus master EISA SCSI host adapter.|
|BT-946C||Bus master PCI-to-Fast SCSI host adapter with floppy controller.|
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-btmm 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.
Start the Multimaster driver:
Start the Multimaster driver with an I/O port of 0x330 and an interrupt of 11:
devb-btmm btmm ioport=0x330,irq=11 &
The devb-btmm 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:
|cam-cdrom.so||For CD-ROM access|
|cam-disk.so||For hard-disk access|
The devb-btmm 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 BusLogic/Mylex Multimaster host adapter is compatible with the Adaptec AIC-154x SCSI controller. On startup, the enumerators recognize this adapter as the Adaptec card but devb-aha4 will fail unless it includes the clone option.
Unless overridden with the blk automount= option (see io-blk.so), devices are mounted as:
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.
cam-*, devb-*, fs-*, io-blk.so
“Filesystems and block I/O (devb-*) drivers” in the Fine-Tuning Your System chapter of the QNX Neutrino User's Guide