Drives have warranties, after which the manufacturer doesn't make any claims about it's durability. This could put your fleet at wild and significant risk if th

Drives have warranties, after which the manufacturer doesn't make any claims about it's durability. This could put your fleet at wild and significant risk if things start hitting a wall and failing en masse. You may not be able to repair away if as you're repairing the data you're copying to yet another dying drive. So you have usually a lifetime of drive tput and start/stop values you want to stay under, and depending on how accurate your data is for each drive you may push beyond the drive warranties. But you will generally stop before the drive actually fails.