Even the ST310014ACE (firmware 3.09) has a better 1MiB random read time (59ms) than the WD400EB-11CPF0.
With 1 unrecoverable error per 10^15 bits (specified for most "nearline" drives such as Seagate Constellation ES):
4TB: 3.1%
3TB: 2.4%
2TB: 1.6%
1TB: 0.8%
With 1 unrecoverable error per 10^16 bits (specified for high-end enterprise drives like the Seagate Savvio line) (using example capacities which will take many years to attain, if they ever attain them while keeping the error rate down):
40TB: 3.49%
30TB: 2.63%
20TB: 1.76%
10TB: 0.88%
Note, however, that the Constellation CS only has the 1 unrecoverable error per 10^14 bits specified for most consumer drives.
With 1 unrecoverable error per 10^15 bits (specified for most "nearline" drives such as Seagate Constellation ES):
4TB: 3.1%
3TB: 2.4%
2TB: 1.6%
1TB: 0.8%
With 1 unrecoverable error per 10^16 bits (specified for high-end enterprise drives like the Seagate Savvio line) (using example capacities which will take many years to attain, if they ever attain them while keeping the error rate down):
40TB: 3.49%
30TB: 2.63%
20TB: 1.76%
10TB: 0.88%
Note, however, that the Constellation CS only has the 1 unrecoverable error per 10^14 bits specified for most consumer drives.