File System Check Exit Code is 8 on Hitachi External HDD

I bought a new Hitachi HTS725050A9A364 500GB 7200RPM hard drive a year ago. I split it into two partitions. One has OS X Yosemite installed, and another one has Windows 7. It was working fine on my MacBook until my son used my Mac and installed some games. It became slow and stopped functioning 5 days ago. I tried to repair it, but Disk Utility couldn’t. The details say, “The file system check exit code is 8.”

Your Hitachi external hard drive is likely corrupted or has hardware issues. Have you tried to reformat the physical disk? If not, take the steps below:

Don’t forget to recover data from your drive before reformatting it! You can trust iBoysoft Data Recovery for Mac to get your files back.

  1. Open Disk Utility.
  2. Click View > Show All Devices.
  3. Select the outdented physical drive and click Erase.
  4. Name it.
  5. Choose Mac OS Extended (Journaled) as the format.
  6. Keep the scheme GUID Partition Map.
  7. Click Erase.
  8. After formatting, reconfigure it with the Mac OS X system and Windows 7.