I wonder how long that helium seal is good for? Helium is generally a tricky thing to keep contained. Tiny, noble atoms think they're too good for containment.
I don't suppose they have data published on the uncorrectable read error rates? A Google search for "smr helioseal uncorrectable read error" yields an rare zero results.
Edit: Here we go,
this PDF is for the 6TB drive.
Non-recoverable error rate: 1 in 10^15 bits
One 6TB drive: 48,000,000,000,000 bits (I don't know what other bits might be added for internal parity storage.)
And 10TB: 80,000,000,000,000 bits
10^15 = 1,000,000,000,000,000
So...I'm not versed in prob&stat anymore. How likely will it be that reading just a single full drive will end up giving an unrecoverable read error?