This version of this document is no longer maintained.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

cam-disk.so

Provide a common access method for hard disks

Syntax:

driver ... disk disk_options ... &

Runs on:

Neutrino

Options:

driver

One of the devb-* drivers.

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

name=prefix[@device_number]

Specify the device prefix and optionally where to start numbering the devices from:

• disk name=usb names the devices /dev/usb0, /dev/usb1, and so on
• disk name=usb@2 starts at /dev/usb2, /dev/usb3, and so on (in the absence of any existing naming conflicts)

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Specify device numbers only on a closed system where you know all the devices and indexes.

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The default is hd.

nobios

Don't use the geometry from BIOS int 13. By default, if you don't specify the translation option, the BIOS geometry is used.

noptab

Don't use the geometry from the partition table. The geometry from the partition table is used if you specify the nobios option, or the BIOS geometry is invalid.

retries=num:path_id:target:lun

Set the maximum number of command retries on the specified path, target, and lun. The default is 10.

timeout=time:path_id:target:lun

Set the command timeout on the specified path, target, and lun.

translation=heads[:sectors[:path_ID[:target[:lun]]]]

Specify the geometry explicitly; this overrides the geometry from the BIOS and the partition table. The arguments are:

• heads and sectors — report this many heads (and optionally, sectors) to io-blk.so for hard disks (default is 64 heads and 32 sectors). The QNX filesystem doesn't need this information for normal operation. It's needed only to let fdisk write the correct boot cylinder for booting.
• path_ID — the number of the controller to use, where the first controller is 0 (the default).
• target — for IDE, this is the master (0) or slave (1); for SCSI, it's the SCSI ID the device is jumpered for. The default is 0.
• lun — the Logical Unit Number for SCSI; not needed for IDE. The default is 0.

verbose[=level]

Be verbose. If you don't specify a level, cam-disk.so increments the current level by one.

Description:

The cam-disk.so provides common access methods (CAMs) for hard disk devices.

See also:

cam-cdrom.so, cam-optical.so, devb-*, fdisk, fs-*, io-blk.so