{TAIL ~ Disk drive} and method of re injecting low density gas in {HEAD ~ a hermetically sealed disk enclosure} of a disk drive 
{ TAIL ~ Disk drive } and method of re injecting low density gas in { HEAD ~ a hermetically sealed disk enclosure } of a disk drive
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH