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Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux	Debian 6.0.9 (Squeeze)
	blockdev(8)

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BLOCKDEV

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
COMMANDS
AUTHOR
AVAILABILITY

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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.
	−q		Be quiet.
	−v		Be verbose.

−−report

Print a report for devices. Note that the partition StartSec is in 512-byte sectors.

COMMANDS

−-setro

Set read-only.

−-setrw

Set read-write.

−-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.

−-setbsz N

Set blocksize to N bytes.

−-getsize

Print device size in sectors (BLKGETSIZE). Deprecated in favor of the −-getsz option.

−-getsize64

Print device size in bytes (BLKGETSIZE64)

−-getsz

Get size in 512-byte sectors (BLKGETSIZE64 / 512).

−-setra N

Set readahead to N 512-byte sectors.

−-getra

Print readahead (in 512-byte sectors).

−-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/.

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blockdev(8)