То есть шедулер тот, что в системе по умолчанию стоит ?
https://openzfs.github.io/openzfs-docs/Performance%20and%20Tuning/Module%20Parameters.html#zfs-vdev-scheduler
When the pool is imported, for whole disk vdevs, the block device I/O scheduler is set to zfs_vdev_scheduler. The most common schedulers are: noop, cfq, bfq, and deadline.
In some cases, the scheduler is not changeable using this method. Known schedulers that cannot be changed are: scsi_mq and none. In these cases, the scheduler is unchanged and an error message can be reported to logs.