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David That depends on the hardware layout. If you don't know and you say the data is still somewhere else You could..... Pull a disk out and see what happens to the pool the one you pulled will be highlighted as the pool looses all it's replicas (clear "should" fix when you plug it back in.) Or..... Create a single zpool on each drive and then unplug a drive and see which zpool dies! However..... You may not have hot plug drives so if they have a busy light, create a pool on each drive write a lot of data to each disk pool one at a time and see which access lights flash. Or...... Unmount (or destroy) the zpool and power off the machine. Plug in just one drive and boot. Use format to see which drive appeared. Repeat as needed... You can also run destructive tests using format on the suspect drive and see what that thinks. It is really a good idea to know which drive is which because they are going to fail! I'm surprised it's not on the hardware somewhere, but I tend to play with hardware from the big three and there is always a label. Warning: Others have reported that rebooting system with faulted or degraded ZFS pools can be "problematic" (you :-)) so be careful not to reboot with a pool in that state if at all possible. Trevor David Stewart wrote: How do I identify which drive it is? I hear each drive spinning (I listened to them individually) so I can't simply select the one that is not spinning.
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