That's very good.

Now a couple of observations on your setup.

1. Mixing internal and external disks in a volume is a bad idea ( prefereably not in the same DG )

2. If you have to use the internal disks put the log plex on the external disks with one data disk and the spare on the internal disks.

The reason for both of the above is that if you get a failure it is more likely to be consistent. Even if the external disks all fail you should be able to pull the internal disks and reattach the external ones. You will be able to rebuild the one internal data disk from parity.

If you can avoid using the internal disk at all then do. A failure of the external disks is likely to be self consistent in such a scenario and is much easier to recover.

3. Get the SCSI csi controller checked and check for patches for bugs that cause controller failure-like sysmptoms it is likely the original cause of your problem was one or other.

---------- Post updated at 04:10 AM ---------- Previous update was at 04:06 AM ----------

You're welcome. It's always rewarding to get to the bottom of a problem and all the more enjoyable if the person at the other end doesn't panic or get flustered.