mirror and backup
Of course if I had a companies or business units livelyhood sitting on a non-mirrored and backedup storage I will be the one that gets fired when it dies.
The fact is, mechanical drives are reaching their limits in large databases, I have come across many databases that are being bottlenecked by the IO to SAN - more cpu waits (IO) than cpu usage.
There are several things than can be done to alleviate that bottleneck, depending on the workload of course and the SQL code, but after you do all of that you are still being bottlenecked by the spinning of the disk, and its getting harder and harder to get around that.
Back in the day setting binary switches and using paper tape and cards was replaced by tape drives and tape was replaced by hard disk for production usage ( not backups necessarily )and it is inevitable that disk will be replaced by solid state. These hybrid drives just look like an interim marketing gimmick to me.
It is interesting what will be the backup medium though.
To be honest I am not comfy will all of my pictures being on my hard drive and my backup hard drive, whether mechanical or SSD, sure it is fine for me right now but what about my family 100 years from now?
I can look at photos from my great grandparents from when they were married in 1901 in San Antonio TX, but will my great grankids be able to see my photos stored on a hard drive?