Another gotcha: If you intend to physically move a pool of disks from one system to another, or even move them to different SATA or SAS ports on the same system

Another gotcha: If you intend to physically move a pool of disks from one system to another, or even move them to different SATA or SAS ports on the same system (or different drive bays in a JBOD), you should EXPORT THE POOL FIRST. I came within a hair's breadth of losing a pool when I didn't do that, and import attempts resulted in "corrupted data" messages. I managed to straighten that out and recover the pool, but it was a close call. When it is not exported, the pool stores the device names of its component disks, and if the wrong disks end up on the wrong devices, you get the "corrupted data" problem even though the data really isn't corrupted.