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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

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

COMMANDS

TagDescription
--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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