tldr/pages/linux/blkpr.md

# blkpr

> Register, reserve, release, preempt, and clear persistent reservations on a block device that supports Persistent Reservations.
> More information: <https://manned.org/blkpr>.

- Register (command) a new reservation with a given key on a given device:

`blkpr {{[-c|--command]}} register {{[-k|--key]}} {{reservation_key}} {{path/to/device}}`

- Set the type of an existing reservation to exclusive access:

`blkpr {{[-c|--command]}} reserve {{[-k|--key]}} {{reservation_key}} {{[-t|--type]}} exclusive-access {{path/to/device}}`

- Preempt the existing reservation with a given key and replace it with a new reservation:

`blkpr {{[-c|--command]}} preempt {{[-K|--oldkey]}} {{old_key}} {{[-k|--key]}} {{new_key}} {{[-t|--type]}} write-exclusive {{path/to/device}}`

- Release a reservation with a given key and type on a given device:

`blkpr {{[-c|--command]}} release {{[-k|--key]}} {{reservation_key}} {{[-t|--type]}} {{reservation_type}} {{path/to/device}}`

- Clear all reservations from a given device:

`blkpr {{[-c|--command]}} clear {{[-k|--key]}} {{key}} {{path/to/device}}`