BLOCKDEV
Section: Maintenance Commands (8)
Updated: Jun 2007
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
-
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Time: 07:35:43 GMT, March 26, 2013