(Cross-posting a couple places to hopefully find help) I've got a DIY NAS that I built a number of years ago based on a Megaraid 9271-8icc. There's 8x HDD RAID-50 array on it, and a 6x SSD RAID-6 array. Well, last Sunday, the card started dying. The machine's boot drives are NOT on the raid controller, and every few reboots, the card works for a while and then craps out. So, I bought a new (used) card from eBay.
Now, storage is NOT my forte. I know enough to be dangerous to myself. How do I go about replacing the failing card without losing all my data? Will the new card see data on the drives and realize "Oh, this is part of an array"? Do I need to try to recover some settings from the old card? Could someone explain this to me like I'm an end user? :P