drive. Always back up your data before running Check Disk scans on your hard drive. If a bad sector is found,
data that had been available can be inaccessible once the bad sector is reallocated.
Follow the steps below to run Check Disk:
1. Launch Command Prompt. Go to the start menu or start screen to type cmd and then click Command
Prompt.
2. Type chkdsk X: /f. “X“ is the letter for your hard drive
The length of time for the test to complete can vary and is usually longer for higher capacity storage devices.
Mac diagnosc tool
Mac OS includes Disk Utility, a tool for formatting, testing and repairing hard drives. Disk Utility’s test and
repair option is called First Aid.
Always back up your data before running First Aid scans on your hard drive. If a bad sector is found, data that
had been available can be inaccessible once the bad sector is reallocated.
Follow the steps below to run First Aid:
1. From the Finder, click Go > Utilities > Disk Utility.
2. Hard drives are listed on the left of the Disk Utility window. Find your Seagate device and click it.
Information about the drive is available, including the file system. Additionally, partitions are visible in
the left column as a second indented row under the storage device. There may be cases in which a
partition is mounted on the desktop but does not appear in Disk Utility. You can still run the test on the
hard drive.
3. Click a partition to select it.
4. Click the First Aid tab/button.
5. To check the volume:
Mac OS 10.10 and earlier: click Verify Disk. If Disk Utility reports that the disk needs to be repaired,
click Repair Disk.
Mac OS 10.11 and later: click Run to begin the test.
6. If you have additional partitions, repeat the test on each one.
