Originally Posted by wh-coach
If you're going to buy a RAID card, do you get two (i.e. in case the card is no longer made by the time it dies and you can't source a second?)... Would you just stick with software RAID and leave it at that? Other?
If you can afford you a really good raid cards then you need to purchase N+1 at least, where N is your servers count
if one of yours will be gone or/and unavailable to purchase anymore you need to have it on hand.
And if you can't buy good ones I think that software raid is a good deal then.
One mention: never connect SSD drives to cheap RAID cards! Ever!
I'd suddenly noticed that my SSD can get me much more IOPS without 'megaraid' card for example!