But Wait...ZFS Always Had Device Flexibility

Continuation of this previous blog from Cindy:

Talking to customers this week about the Oracle Solaris ZFS device removal feature brought up a few key points that I would like to emphasize:

• Mirrored pool configurations have always had the most device flexibility because you can add vdevs, detach devices, and replace smaller devices or LUNs with larger devices.
• You could even have a mirrored pool configuration with a uneven number of devices and even mirror across different sized disks. The mirrored capacity would be equivalent to the smallest size disk when mirroring across different sized disks.
• Devices can be detached if you need to temporarily borrow a pool device for another task but its risky to remove redundancy from an active pool on a running system.