So my computer is just over 1 year old. I put it on sleep a lot rather than shutting it down (but I don't think this hurts the hard drive). Is there any reason for worry? According to HD Sentinel, the percent health is 88%. According to "Failure Trends in a Large Disk Drive Population", my hard drive (14 months old) has a ~90% probability of making it through the next 8 months (after the first reallocation). There is a concern though, after the 1st event, hard drives are 15 times more likely to fail in the next 60 days or so. I did get most of my items backed up but not all of them yet. But none of my two external HDs (one lacie, one western digital) have any SMART technology enabled on them so I can't check their progress at all. Also, bad sectors are only discovered on bootup, right? What if you just left your PC on all the time? Would the computer suddenly crash upon coming across a bad sector or what?