If the helium leaks out and is replaced with air the disk will fail.
It's not designed to run with air.
As to how WD seals their disk ask them.
Just got a WD Gold 10TB/7200/256/SATA 6. It's helium filled so actutator arms and spinning disks have less air resistance and operate in a near vacuum allowing tighter tolerances and larger capacities. Yeah!............... Then I started thinking about it...............
Anyone know how the helium is stored in there? Are the disks bagged in some kind of a bladder to surround them or is the case just sealed when assembled with rubber gaskets?
I'm in hot dry Arizona, so rubber parts and seals dry out quickly and crack 'round here.
What will happen if I do get a leak, just general slowdown or will arms be crashing into the disks?
Currently transferring data from a almost full 6TB using a docking station. 10TB seems heavier and more solid. It's absolutely silent, even when it starts. No clue it's running at all.
After only 36 hours of running non stop it's very warm to the touch, but not hot, so it must help with cooling even though it seems that sealing it up would make it hotter.
I thought I've read in the past some large capacity enterprise drives were "directional". Meaning HD's had to be installed horizontally or the opposite up on their sides. I think that was more for cooling air flow reaching the drives than to prevent fluids from leaking.
Any thoughts from the cnet guru's? Stay on subject please it's HELIUM........