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blkdiscard: add page (#3292)

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Adam I 2019-10-03 16:37:08 -04:00 • committed by Owen Voke
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# blkdiscard
> Discards device sectors on storage devices. Useful for SSDs.
- 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}}`