tldr/pages/linux/blkdiscard.md

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}}