LSBLK(8)						       System Administration							  LSBLK(8)

NAME

       lsblk - list block devices

SYNOPSIS

       lsblk [options]

       lsblk [options] device...

DESCRIPTION

       lsblk lists information about all or the specified block devices.  The lsblk command reads the sysfs filesystem to gather information.

       The  command prints all block devices (except RAM disks) in a tree-like format by default.  Use lsblk --help to get a list of all available
       columns.

OPTIONS

       -a, --all
	      List all block devices.

       -b, --bytes
	      Print the SIZE column in bytes rather than in human-readable format.

       -d, --nodeps
	      Don't print device holders or slaves.  For example "lsblk --nodeps /dev/sda" prints information about the sda device only.

       -D, --discard
	      Print information about the discard (TRIM, UNMAP) capabilities for each device.

       -e, --exclude list
	      Exclude the devices specified by a comma-separated list of major device numbers.	Note that RAM  disks  (major=1)  are  excluded	by
	      default.

       -f, --fs
	      Output info about filesystems.  This option is equivalent to "-o NAME,FSTYPE,LABEL,MOUNTPOINT".  The authoritative information about
	      filesystems and raids is provided by the blkid(8) command.

       -h, --help
	      Print a help text and exit.

       -i, --ascii
	      Use ASCII characters for tree formatting.

       -m, --perms
	      Output info about device owner, group and mode.  This option is equivalent to "-o NAME,SIZE,OWNER,GROUP,MODE".

       -l, --list
	      Use the list output format.

       -n, --noheadings
	      Do not print a header line.

       -o, --output list
	      Specify which output columns to print.  Use --help to get a list of all supported columns.

       -P, --pairs
	      Use key="value" output format.

       -r, --raw
	      Use the raw output format.

       -t, --topology
	      Output info about block device topology.	This option is equivalent to "-o NAME,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED".

NOTES

       For the partitions are some information (e.g. queue attributes) inherited from parental device.

AUTHORS

       Milan Broz <mbroz@redhat.com>
       Karel Zak <kzak@redhat.com>

SEE ALSO

       findmnt(8), blkid(8), ls(1)

AVAILABILITY

       The lsblk command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							    April 2010								  LSBLK(8)