Spare hot-plug disk trays?

Once you have broken the small fragile piece of plastic covering the SATA contacts on a drive, resulting in the contacts sticking out with no support whatsoever, thus rendering the drive unusable, you will understand the wisdom of not cycling the drives. The SATA drive design was intended for the drive to be connected and left. In my case it was a desktop drive with no critical data, so I only suffered the loss of a drive, not data which would have been more important.

That is not even considering the potential of static sparks. Remember Murphy is always lurking.