On Sat, 21 Jul 2018, Al Kossow via cctalk wrote:
The edge of the disk is SUPPOSED to be sealed. On cheap media, you see it oozing, and the aluminum oxidizing from the edge inward. This was pointed out to me already in the late 90's.
Fortunately, unlike most spinning rust disks, the default is to start at the center and work out. Therefore, discs that are not full will last a little longer.
