BLKDEV(4D) Devices BLKDEV(4D)

blkdev — generic block device driver

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).

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/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 number, representing a subset of the disk. See dkio(4I).

rmformat(1), sd(4D), pcfs(4FS), zfs(4FS), dkio(4I), devinfo(8), fdisk(8), mount(8), umount(8)

July 30, 2014 OmniOS