Here is a SCSI U320 Ultrastar drive with a slight issue: the magnetic coating has been scrubbed off the substrate. I’ve never seen this happen to any other drive before. The inside of the drive is coated with the resulting dust created from this rather epic failure mode. 00
This is a Western Digital drive recently removed from my laptop when it died of a severe head crash. Top of drive can be seen here. Here the cover has been removed from the drive, showing the platter, head arm & magnet. Yellow piece top left is head parking ramp.