Provided by: util-linux_2.12r-4ubuntu6_i386 bug

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.

                                   May 2000                        BLOCKDEV(8)