GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  BLOCKDEV (8)

NAME

blockdev - call block device ioctls from the command line

CONTENTS

Synopsis
Description
Options
Commands
Author
Availability

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. Note that the block size is specific to the current file descriptor opening the block device, so the change of block size only persists for as long as blockdev has the device open, and is lost once blockdev exits.
--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/.

Search for    or go to Top of page |  Section 8 |  Main Index


BLOCKDEV (8) Jun 2007

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.