blockdev

Call ioctl(s) on each listed block device toybox

On Linux

Linux

from the toybox, 0BSD

blockdev --OPTION... BLOCKDEV...

Show 13 options

--setroSet read only

--setrwSet read write

--getroGet read only

--getssGet sector size

--getbszGet block size

--setbsz BYTESSet block size

--getszGet device size in 512-byte sectors

--getsizeGet device size in sectors (deprecated)

--getsize64Get device size in bytes

--getraGet readahead in 512-byte sectors

--setra SECTORSSet readahead

--flushbufsFlush buffers

--rereadptReread partition table

Manage, query, and manipulate block devices.

Print a report for all devices

sudo blockdev --reportIdentify

Print a report for a specific device

sudo blockdev --report /dev/sdXYIdentify

Get the size of a device in 512-byte sectors

sudo blockdev --getsz /dev/sdXYIdentify

--getszGet device size in 512-byte sectors toybox

Set read-only

sudo blockdev --setro /dev/sdXYIdentify

--setroSet read only toybox

Set read-write

sudo blockdev --setrw /dev/sdXYIdentify

--setrwSet read write toybox

Flush buffers

sudo blockdev --flushbufs /dev/sdXYIdentify

--flushbufsFlush buffers toybox

Get the physical block size

sudo blockdev --getpbsz /dev/sdXYIdentify

Set the read-ahead value to 128 sectors

sudo blockdev --setra 128 /dev/sdXYIdentify

--setraSet readahead toybox