From: "Tim" <ignored_mailbox@xxxxxxxxxxxx>
Other things that kill drives can be: Vibrations, they should be bolted firmly in place, and nothing else should vibrate the chassis. Tortional stress - you don't want a chassis that twists or squashes a drive.
If you are in a high vibration environment the drives really should be mounted in shock mounts if you have the option. Solidly mounting them to the chassis simply conveys the shocks directly to the delicate insides of the drives. {^_^}