blockdev - Unix, Linux Command

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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

Tag	Description
-V	Print version and exit.
-q	Be quiet.
-v	Be verbose.

COMMANDS

Tag	Description
--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.

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