Have you ever EOLd an SSD?
I’ve heard and read various things about how SSDs die. But how do they actually die? The failure process seems like it should be more methodical than spindle drives, given less factors, so if you have X many of the same SSD drive and none of them suffer manufacturing defects, if you repeat the same series of operations on them they should all die around the same time.
If that’s correct, then what happens to SSDs in RAID? A mirror configuration isn’t necessarily going to result in the exact same sequences of write operations – which means that, at some point, your drives might become out of sync in-terms of volume sizing. Stripe, at least, has some chance of distributing the wear.
But has anyone actually deliberately EOLd SSDs in various configurations to see whether they die with dignity (and manageable degradation rates) or are people in for a shock when one day they find their SSD raid array is down to 70% capacity and is going to be dead in the water before replacements can arrive?