Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
ZFS uses parity to store and validate redundant data. It also uses CRC checking to validate data and metadata. But ZFS uses all the memory it can get its hands on for such transactions, cacheing, etc. If a bitflip occurs, faulty data can be written to the array, checks or no. If a CRC check...
Odd, that. I've never had real trouble due to bad sectors in my life. When my disks grew old (40000+ hrs, mostly WD Green 1T+ stuff), they simply packed up and went away, all at once.
Which is rather annoying. I'd like to have some advance warning of imminent disk failure next time. To save me...