8:blockdev

From Linux Man Pages

      blockdev - call block device ioctls from the command line
      
      blockdev [options] commands devices

Contents 1 DESCRIPTION 2 OPTIONS 3 COMMANDS 4 CATEGORY

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.

CATEGORY