To be expected. TB of space / MB/s write speed = write time. Do the same for read time, add them together for a single all-sector read/write test. I generally don't bother with new drives. Second hand, maybe run a couple of xxhash checksums over the drive and make sure they return the same value, but even then I just get impatient. Next gen filesystems will tell you really quick if reads or scrubs have even a single bit bad (acknowledging you aren't going every sector on a non-full drive), and you should have good backups where it counts.