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.
Zfs
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.