BLOCKDEV

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.