Wish I knew, and it was SCSI equipment with Adaptec and MegaRAID controllers that I still own but no longer use. The stupidest little thing seemingly brought down the arrays. After so many drives and controllers I used over the years, I was not able to narrow down the failures. Don't get me wrong, I have had arrays run for well over a year, but that's still too short a time to have a failure with an array, IMO. For me it was unacceptable, for others maybe not. It depends on your tolerance (no pun) and your application. YMMV.Why did you have so many failures? Was it an actual drive failure or some sort of controller issue resulting in a dropped drive?
Very possible, but I am less chance taking than I was when in my 20s.I'd be surprised to see high failure rates for any modern drive, especially these since they have a 1.4 million hours MTBF.
Note: By failure I mean an array failure, not a component failure, which is different. I don't think I ever experienced a failure due to a malfunctioning disk. The array usually became corrupt or something else caused it to fail (ie. not being read/detected by the RAID controller properly).