NAME
blockdev - call block device ioctls from the command line
SYNOPSIS
blockdev
[options]
commands devices
blockdev
--report
[devices]
DESCRIPTION
The utility
blockdev
allows one to call block device ioctls from the command line.
OPTIONS
-V
Print version and exit.
--report
Print a report for
R devices .
COMMANDS
--getro
Get read-only. Print 1 if the device is read-only, 0 otherwise.
--getss
Print sectorsize in bytes - usually 512.
--getbsz
Print blocksize in bytes.
I --setbsz N
Set blocksize to
N
bytes.
--getsize
Print device size in sectors.
--getsize64
Print device size in bytes.
I --setra N
Set readahead to
N
512-byte sectors.
--getra
Print readahead (in 512-byte sectors).
I --setfra N
Set filesystem readahead (same like --setra on 2.6 kernels).
--getfra
Get filesystem readahead.
--flushbufs
Flush buffers.
--rereadpt
Reread partition table.
AUTHOR
blockdev was written by Andries E. Brouwer.
AVAILABILITY
The blockdev command is part of the util-linux-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
