Provide a common access method for optical disks
Syntax:
driver ... optical disk_options ... &
Options:
- driver
- One of the devb-* drivers.
The optical options control the driver's interface to
cam-optical.so. If specified, they
must follow the optical keyword:
- name=prefix
- Specify the device prefix (default: mo).
- 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 Logical Unit Number (LUN).
The default is 10.
- rmb=[true|false]@path_id:target:lun
- Set/clear the device as removable on path N,
target N, and LUN N.
- timeout=g1:g2:g3:rw@path_id:target:lun
- Set the rw and group command timeouts on path N,
target N, and LUN N.
The defaults are the values from the Timeout and Protect mode page
if supported, otherwise 60:90:10:10 (in seconds).
- 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).
This information is 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 other
drivers, it's the device ID. The default is 0.
- lun — the Logical Unit Number. The default is 0.
- verbose=verbosity@path_id:target:lun
- Set the verbosity level on path N, target N, and
LUN N.
Description:
The cam-optical.so provides common access methods (CAMs) for optical disk
devices.