ZFS | inetshell

ZFS: resume an interrupted zfs send | zfs recv (receive_resume_token)

Always receive with zfs recv -s. If it drops: zfs get receive_resume_token target on the receiver and zfs send -t on the sender. To give up, zfs recv -A target deletes the partial state.

FreeBSD: replace a disk in the ZFS boot mirror (zroot) with gpart

gpart backup ada0 | gpart restore -F ada3, BIOS bootcode on the freebsd-boot partition, loader.efi on the ESP, and zpool replace zroot ada3p4. Never the whole disk: you would lose the boot partitions.

Export a ZFS ZVOL to a RAW image

A ZVOL is a block device. dd (or qemu-img convert) to .raw. Snapshot first if the VM is up.

Import a ZFS pool after a power outage

Pool will not import. -f force, -F rewind txgs, then scrub.

Native ZFS encryption (OpenZFS): create, inherit, change-key

encryption=on at create. Children inherit. On Linux, rotate with zfs change-key.

Protect ZFS snapshots from destroy with hold

zfs destroy says dataset is busy. That is a hold. How to set one and drop it.

Replace a disk in a ZFS pool

zpool status gives you a GUID, not /dev/sde. replace -f GUID /dev/disk/by-id/…

Send ZFS snapshots to another host (and on to S3)

A zfs send stream is not a tarball. Another pool first, S3 object if you need it.

ZFS command cheat sheet (pool, compression, cache, log)

The 2 a.m. commands to create, mount, compress, and not destroy the wrong pool.

zfs send/recv from an unencrypted dataset into an encrypted one

No -w. -o encryption=on only on the first recv. The destination dataset name is required.