Compaq Armada 7400 Reference Manual page 66

Avoid exposing a hard drive to products with magnetic fields
such as video and audio tape erasure products, monitors, and
speakers.
Do not spray the drive with cleaners or expose it to liquids.
Avoid exposing the drive to temperature extremes.
If a drive must be mailed, ship it in a suitable form of
protective packaging. Shipping the drive in standard
packaging may not cushion it from destructive shock,
vibration, temperature, or humidity. Place a mailing label with
the wording "Fragile: Handle With Care" on the mailer.