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blockdev — Manage, query, and manipulate block devices. More information: <https://manned.org/blockdev>.

Submitted by: @import:tldr-pages··
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blockdevcommandandmanipulateclimanagequeryblock
linux

Problem

How to use the blockdev command: Manage, query, and manipulate block devices. More information: <https://manned.org/blockdev>.

Solution

blockdev — Manage, query, and manipulate block devices. More information: <https://manned.org/blockdev>.

Print a report for all devices:
sudo blockdev --report


Print a report for a specific device:
sudo blockdev --report {{/dev/sdXY}}


Get the size of a device in 512-byte sectors:
sudo blockdev --getsz {{/dev/sdXY}}


Set read-only:
sudo blockdev --setro {{/dev/sdXY}}


Set read-write:
sudo blockdev --setrw {{/dev/sdXY}}


Flush buffers:
sudo blockdev --flushbufs {{/dev/sdXY}}


Get the physical block size:
sudo blockdev --getpbsz {{/dev/sdXY}}


Set the read-ahead value to 128 sectors:
sudo blockdev --setra 128 {{/dev/sdXY}}

Code Snippets

Print a report for all devices

sudo blockdev --report

Print a report for a specific device

sudo blockdev --report {{/dev/sdXY}}

Get the size of a device in 512-byte sectors

sudo blockdev --getsz {{/dev/sdXY}}

Set read-only

sudo blockdev --setro {{/dev/sdXY}}

Set read-write

sudo blockdev --setrw {{/dev/sdXY}}

Context

tldr-pages: linux/blockdev

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