So, I run a 4x 3TB RAID-5 on the Intel motherboard RAID system for my home data storage needs and it's been serving me well for the past few years.
A few weeks ago, it fell into degraded mode, and I unplugged and re-plugged the culprit and moved on after the rebuild, business as usual.
Today, the same disk failed again, except this time the RAID utility outright told me that the disk had failed (rather than it had merely fallen out of sync, as I presumed last time).
To test whether it was dead, I unplugged it from the array and plugged it into a different board, and lo and behold, the disk shows as uninitialised space.
Then, wondering what was going on, I put it back into the array, and now it simply says it's fallen out of sync, and is currently rebuilding according to RST.
I've got no idea what's going on. Should I be worried that there's something wrong with this disk? All of my disks are from the same batch (they have sequential serial numbers) so I'm beginning to worry about my data.
I'm tempted to just replace the questionable disk, although that costs money that I don't have. Could it just be the connection, in which case maybe a cheap SATA cable would fix my problems?
Attached is RST's current status, with the drive that "failed" highlighted.