1.\" 2.\" This file and its contents are supplied under the terms of the 3.\" Common Development and Distribution License ("CDDL"), version 1.0. 4.\" You may only use this file in accordance with the terms of version 5.\" 1.0 of the CDDL. 6.\" 7.\" A full copy of the text of the CDDL should have accompanied this 8.\" source. A copy of the CDDL is also available via the Internet at 9.\" http://www.illumos.org/license/CDDL. 10.\" 11.\" Copyright 2014 Garrett D'Amore <garrett@damore.org> 12. 13.Dd "Jul 30, 2014" 14.Dt BLKDEV 4D 15.Os 16.Sh NAME 17.Nm blkdev 18.Nd generic block device driver 19.Sh DESCRIPTION 20The 21.Nm 22driver supports generic block-oriented devices, such as non-volatile 23memory storage devices. 24It provides a hardware independent layer for such storage devices, allowing them 25to concentrate on the hardware-specific details, while 26.Nm 27takes care of all the other details, such as 28.Xr dkio 4I . 29.Lp 30The 31.Nm 32driver only supports block-oriented, random-access devices. 33It does not support traditional rotational media and does not support 34SCSI commands. 35.Lp 36The most typical use case for 37.Nm 38devices is to be used to host a file system, such as 39.Xr pcfs 4FS 40or 41.Xr zfs 4FS . 42. 43.Sh INTERFACE STABILITY 44.Sy Uncommitted . 45. 46.Sh FILES 47. 48.Bl -tag -compact -width Pa 49.It Pa /dev/dsk/cndnsn 50Block device minor nodes. 51.It Pa /dev/rdsk/cndnsn 52Raw block device minor nodes. 53.El 54.Lp 55In the above, the following substitutions may occur: 56.Bl -tag -offset indent -width Va 57.It Va cn 58A controller number, typically one for each instance of 59each underlying hardware dependent device driver (there can be multiple 60such drivers in the system.) Controller numbers are dynamically assigned 61by the system. 62.It Va dn 63Generally, each instance of the underlying hardware will have a 64logical unit number as well. 65.It Va sn 66This is the 67.Em slice 68number, representing a subset of the disk. 69See 70.Xr dkio 4I . 71.El 72. 73.Sh SEE ALSO 74.Xr rmformat 1 , 75.Xr sd 4D , 76.Xr pcfs 4FS , 77.Xr zfs 4FS , 78.Xr dkio 4I , 79.Xr devinfo 8 , 80.Xr fdisk 8 , 81.Xr mount 8 , 82.Xr umount 8 83