blkpr
Register, reserve, release, preempt, and clear persistent reservations on a block device that supports Persistent Reservations.
TLDR
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 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 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 release [-k|--key] [reservation_key] [-t|--type] [reservation_type] [path/to/device]
Clear all reservations from a given device
$ blkpr -c clear [-k|--key] [key] [path/to/device]
