Flashnux

GNU/Linux man pages

• CentOS
• Debian
• Red Hat
• Ubuntu
• Unix

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

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

GNU/Linux	CentOS 4.8	i386
	blockdev(8)

---

BLOCKDEV

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
COMMANDS

---

NAME

blockdev − call block device ioctls from the command line

SYNOPSIS

blockdev [options] commands 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.

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.

−-getsize

Print device capacity (in 512-byte sectors).

−-setra N

Set readahead to N 512-byte sectors.

−-getra

Print readahead (in 512-byte sectors).

−-flushbufs

Flush buffers.

−-rereadpt

Reread partition table.

---

---

blockdev(8)