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 --secure /dev/{{device}}

• Discard the first 100MB of a device:

blkdiscard --length {{100MB}} /dev/{{device}}