Had a thought today while thinking on my new SSD RAID 0 array. I upgraded to improve database performance and keep my data very well backed up.
2 drives increases failure risk - this is the common knowledge. But is that actually true with SSDs?
2 SSDs have twice the number of chips as one. But typically, so does a drive with twice the capacity.
So is my Crucial M4 2x128GB RAID 0 array really more prone to failure than a single Crucial M4 256GB drive?
If we factor in controller chips, cables and the like, then yes, there are more points of failure with multiple drives. But I have to wonder, the the world of spinning platters what percentage of actual "Oh my God my data is fried!" failures are caused by the HDD mechanics vs. the controller chips, cables and the like?
I have had many hard drives die on my over the decades - the first HDD I used was a 5MB beast the size of a full AT case. Somewhere I still have a 10 or 12" platter with a divot in it from a hard drive my dad repaired, and I have seen literally hundreds of head crashed 5.25" platters at hard drive recovery shops. So maybe my experience prejudices me toward assuming most failures are mechanical.
- Brad
2 drives increases failure risk - this is the common knowledge. But is that actually true with SSDs?
2 SSDs have twice the number of chips as one. But typically, so does a drive with twice the capacity.
So is my Crucial M4 2x128GB RAID 0 array really more prone to failure than a single Crucial M4 256GB drive?
If we factor in controller chips, cables and the like, then yes, there are more points of failure with multiple drives. But I have to wonder, the the world of spinning platters what percentage of actual "Oh my God my data is fried!" failures are caused by the HDD mechanics vs. the controller chips, cables and the like?
I have had many hard drives die on my over the decades - the first HDD I used was a 5MB beast the size of a full AT case. Somewhere I still have a 10 or 12" platter with a divot in it from a hard drive my dad repaired, and I have seen literally hundreds of head crashed 5.25" platters at hard drive recovery shops. So maybe my experience prejudices me toward assuming most failures are mechanical.
- Brad