I recently bought a new Seagate 500 GB internal hard disk drive for my desktop and installed Linux (Pear OS). It was working fine for few minutes and then suddenly it hanged. I tried to open directories and got this error message "Failed to execute child process input/output error while read on [path]". I then checked with Disk utility and it shows the same error. I observed my HDD LED on casing was not blinking at all (continuously ON). I rebooted and directly checked with Disk SMART test but found no error. IT was showing that disk was OK. Suddenly after few minutes same problem happened. Then I installed windows 8 on it. It was working fine and suddenly it was frozen. Task manager showed Disk activity 100%. I booted in safe mode and it was working fine. It doesn't show disk activity. I checked my hard drive with most of the tools and nobody showed any kind of error. I did not get what is the problem. Is my Hard drive faulty?