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BLOCKDEV

BLOCKDEV

Section: Maintenance Commands (8) Updated: Jun 2007
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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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
COMMANDS
AUTHOR
AVAILABILITY

This document was created by man2html, using the manual pages.
Time: 22:01:21 GMT, April 16, 2011