snippetbashTip

blkdiscard — Discards device sectors on storage devices. Useful for SSDs. More information: <https://manned.org/b

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commanddevicesblkdiscardsectorsclidiscardsstoragedevice

linux

Problem

How to use the blkdiscard command: Discards device sectors on storage devices. Useful for SSDs. More information: <https://manned.org/blkdiscard>.

Solution

blkdiscard — Discards device sectors on storage devices. Useful for SSDs. More information: <https://manned.org/blkdiscard>.

Discard all sectors on a device, removing all data:

blkdiscard {{/dev/device}}

Securely discard all blocks on a device, removing all data:

blkdiscard {{[-s|--secure]}} {{/dev/device}}

Discard the first 100 MB of a device:

blkdiscard {{[-l|--length]}} {{100MB}} {{/dev/device}}

Code Snippets

Discard all sectors on a device, removing all data

blkdiscard {{/dev/device}}

Securely discard all blocks on a device, removing all data

blkdiscard {{[-s|--secure]}} {{/dev/device}}

Discard the first 100 MB of a device

blkdiscard {{[-l|--length]}} {{100MB}} {{/dev/device}}

Context

tldr-pages: linux/blkdiscard

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