NAME    [Toc]    [Back]

       blockdev - call block device ioctls from the command line

SYNOPSIS    [Toc]    [Back]

       blockdev [options] commands devices

DESCRIPTION    [Toc]    [Back]

       The  utility  blockdev  allows one to call block device ioctls from the
       command line.

OPTIONS    [Toc]    [Back]

       -V     Print version and exit.

       -q     Be quiet.

       -v     Be verbose.

COMMANDS    [Toc]    [Back]

       --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)