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blockdev(8) -- Linux man page
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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