SMART error (ErrorCount) detected on host: fs
Device: /dev/sdb, ATA error count increased from 0 to 74

=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.11
Device Model: ST3500320AS
[..]
9 Power_On_Hours 0x0032 070 070 000 Old_age Always - 26286

OH wait: 26286 / 24 / 365 = 3,00068493 yr

This disk broke exactly after 3 years. WTF?