mappo

Answering my own question here while also letting others know about this great page I found: https://explainshell.com/explain?cmd=sgdisk+-o+-a+8+-n+1%3A1M%3A0+%2Fdev%2Fsdc

That seems to have fixed it. Thank you @JorgeB! Now, a few questions. What can be learned from this? What did I do wrong? Was it a mistake to boot the system with the USB drive still attached? And, most importantly: what did the magic spell command actually do?

I executed the command for all three drives. Rebooted. Like you predicted, the array remains stopped but the START button is clickable. However, I'm unable to perform the New config. No matter which combination I select in the drop-down, the APPLY button stays inactive. Next to it is the message "Array has been Reset (please configure)". Should I go ahead and START the array with "Parity is already valid." checked? I've attached new diag. logs. batcave-diagnostics-20240212-2025.zip

Yes, it was reported on all three data disks - but not on the parity disks. I'm not sure, but it might very well be that the power outage was the first shutdown for the array. I'm gonna say Yes.

batcave-diagnostics-20240212-1905.zip

I have 5 identical WD REDs, each 4TB. Three of them are data disks and two are parity. Everything was working fine. Then I installed Unassigned devices and attached a 5 TB USB drive with old photos and phone videos. Everything was still working fine ... until we lost power. When the system re-booted, the USB drive was still attached - and still larger than any of the parity drives. This resulted in the "Wrong" error. After some research on this forum, I unplugged the USB drive and used Tools\New config. This resolved the "Wrong" error, but the array remains stopped. The START button is no clickable and next to the "Stopped" is a green dot and the message that "Disk in parity slot is not biggest." I've read in previous ports that this might be caused by the controller. In my case, all five drives are connected to SATA ports on the motherboard and it has worked fine for a couple of weeks.

Before I purchase a Basic license, I'm trying to plan the storage in my head. On the purchase page, footnote 1 reads My question is: does the cache-ssd count as "Storage", or can I have six storage drives AND a boot-disk AND a cache-ssd?