Linux / Unix Command: blockdev

Command Library

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.

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Important: Use the man command (% man) to see how a command is used on your particular computer.

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