FWIW I have had drives pass the test and be bad and fail the test and work for years. Your best bet would be to keep backups of your important files and run it till the wheels fall off. Also be ware that even though SATA 3.0 is backwards compatible some SATA controllers have problems with the newer technology. Excerpt from Wikipedia
According to the hard drive manufacturer Maxtor
, motherboard host controllers using the VIA and SIS chipsets VT8237, VT8237R, VT6420, VT6421L, SIS760, SIS964 found on the ECS 755-A2 manufactured in 2003, do not support SATA 3 Gbit/s drives. To address interoperability problems, the largest hard drive manufacturer, Seagate/Maxtor, has added a user-accessible jumper-switch known as the Force 150, to switch between 150 MB/s and 300 MB/s operation.
Users with a SATA 1.5 Gbit/s motherboard with one of the listed chipsets should either buy an ordinary SATA 1.5 Gbit/s hard disk, buy a SATA 3 Gbit/s hard disk with the user-accessible jumper, or buy a PCI or PCI-E card to add full SATA 3 Gbit/s capability and compatibility. Western Digital uses a jumper setting called "OPT1 Enabled" to force 150 MB/s data transfer speed. OPT1 is used by putting the jumper on pins 5 & 6.