BLKDEV(4D) Devices BLKDEV(4D)
NAME
blkdev - generic block device driver
DESCRIPTION
The
blkdev driver supports generic block-oriented devices, such as non-
volatile memory storage devices. It provides a hardware independent
layer for such storage devices, allowing them to concentrate on the
hardware-specific details, while
blkdev takes care of all the other
details, such as
dkio(4I).
The
blkdev driver only supports block-oriented, random-access devices.
It does not support traditional rotational media and does not support
SCSI commands.
The most typical use case for
blkdev devices is to be used to host a
file system, such as
pcfs(4FS) or
zfs(4FS).
INTERFACE STABILITY
Uncommitted.
FILES
/dev/dsk/cndnsn Block device minor nodes.
/dev/rdsk/cndnsn Raw block device minor nodes.
In the above, the following substitutions may occur:
cn A controller number, typically one for each
instance of each underlying hardware dependent
device driver (there can be multiple such drivers
in the system.) Controller numbers are dynamically
assigned by the system.
dn Generally, each instance of the underlying hardware
will have a logical unit number as well.
sn This is the
slice number, representing a subset of
the disk. See
dkio(4I).
SEE ALSO
rmformat(1),
sd(4D),
pcfs(4FS),
zfs(4FS),
dkio(4I),
devinfo(8),
fdisk(8),
mount(8),
umount(8)illumos July 30, 2014 illumos
