My boot SSD suddenly showed 2% health in Hard Disk Sentinel, but I left it alone because I didn't want to reinstall Windows and all my applications. Later, the computer blue-screened and would not boot. After basic troubleshooting, I replaced the SATA cable and the system started working again. When I checked the SSD afterward, its reported health had returned to 100%, and it has stayed there through several restarts. Could the cable have caused the low health reading, or should I still assume the SSD is failing? I also want to know whether I should back up my data, replace the drive, or investigate the earlier blue screen further.
3 Answers
A bad SATA cable can cause communication errors, including CRC errors, and those may affect how some diagnostic programs calculate their health percentage. Replacing the cable may explain why the reading changed, but it does not prove that the SSD itself is healthy. Check the drive’s complete SMART data, especially the reported CRC error count, uncorrectable errors, spare blocks, and any media or wear indicators. Back up anything important before doing more testing.
The blue screen and boot failure should be investigated separately rather than assuming the cable was the only cause. If Windows created crash dumps, reviewing the files in the Windows minidump folder can help identify whether the failure involved storage, drivers, memory, or another component. Also run the SSD manufacturer’s diagnostic tool and monitor the SMART values over time. If the errors return, replace the cable again and seriously consider replacing the SSD.
Hard Disk Sentinel calculates its own health estimate from the SSD’s SMART attributes, so the percentage is not a universal measurement. A sudden change from 2% to 100% could come from a cable-related error count, a temporary communication problem, or the program interpreting one attribute differently. The SSD may be fine, but a previous critical reading should not be ignored. Keep a current backup and consider replacing the drive if SMART reports uncorrectable errors, failing attributes, or additional problems.
So the 100% reading may be valid after replacing the cable, but I should still check the individual SMART values instead of trusting the percentage alone?