Hard Drive Replacement: ZFS Enhancement Mistake

A supposedly straightforward process and I messed up.

Take the problem hard drive offline with:

$ zpool offline poolname devicename

Remove the old hard drive out. Put in the new shiny one in. Then type:

$ zpool online poolname devicename (if needed)

My system was set up to auto detect new devices and add them to the
pool. Big mistake. That ADDED the device as a new top level virtual
device. Leaving my pool still degraded. Worse, this process is
irreversible. I had to destroy the pool and start creating a new one
for data. Data stored here is mostly downloadable so data is not lost.

Lesson is do not ADD devices the command to use is REPLACE.

$ zpool replace poolname olddevicename newdevicename

Comments

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