How To Scan External Hard Drive
Microsoft’s hard disk scanning and repair utility, (“check disk”), was introduced over 30 years ago but still has a useful place today. Users running even the latest Microsoft operating system can still use the command to examine their hard drives for errors and repair them if necessary.
How To Scan External Hard Drive For Bad Sectors
Here’s how to run CHKDSK in Windows 10.Even in Windows 10, the CHKDSK command is run via the Command Prompt, but we’ll need to use administrative privileges to properly access it. To launch a Command Prompt as an Administrator, press the keyboard shortcut Windows Key + X to bring up the power users menu, then let go of those two keys and tap the A key. Alternatively, with the power users menu open you can use your mouse or trackpad to select the Command Prompt (Admin) option.You’ll be presented with a UAC window requesting permission to launch the Command Prompt as Administrator. Click Yes to proceed and you’ll see a new Command Prompt window.
Scan Drive For Errors
You can verify that you’ve successfully granted the Command Prompt administrative privileges by ensuring that “Administrator: Command Prompt” is present in the window’s title bar.From the Command Prompt, type the command “ chkdsk” followed by a space, then the letter of the drive you wish to examine or repair. In our case, it’s internal drive “C.”Simply running the CHKDSK command in Windows 10 will only display the disk’s status, and won’t fix any errors present on the volume.
To tell CHKDSK to fix the drive, we need to give it parameters. After your drive letter, type the following parameters separated by a space each: “ /f /r /x”.The “/f” parameter tells CHKDSK to fix any errors it finds; “/r” tells it to locate the bad sectors on the drive and recover readable information; “/x” forces the drive to dismount before the process starts. Additional parameters are available for more specialized tasks, and are detailed at.To summarize, the full command that should be typed into the Command Prompt is: chkdsk Drive: parametersIn our example, it’s: chkdsk C: /f /r /xNote that CHKDSK needs to be able to lock the drive, meaning that it cannot be used to examine the system’s boot drive if the computer is in use. If your target drive is an external or non-boot internal disk, the CHKDSK process will begin as soon as we enter the command above. If, however, the target drive is a boot disk, the system will ask you if you’d like to run the command before the next boot. Type “yes” (or “y”), restart the computer, and the command will run before the operating system loads, allowing it to gain full access to the disk.A CHKDSK command can take a long time, especially when performed on larger drives. Once it’s done, however, it will present a summary of results including total disk space, byte allocation, and, most importantly, any errors that were found and corrected.The CHKDSK command is available in all versions of Windows, so those on Windows 7, 8, or XP can also perform the steps above to initiate a scan of their hard drive.
In the case of older versions of Windows, users can get to the Command Prompt by going to Start Run and typing “cmd”. Once the Command Prompt result is displayed, right-click on it and select “Run as Administrator” to grant the program the necessary privileges to execute CHKDSK successfully.A final note: we’ve covered how to run CHKDSK in, and some users who followed the suggested steps were alarmed to find that their hard drive space was significantly reduced after running the command. This result is due to a failing hard drive, as one of the crucial functions that CHKDSK performs is to identify and block bad sectors on the drive.
A few bad sectors on an old drive will typically go unnoticed to the user, but if the drive is failing or has serious problems, you could have huge numbers of bad sectors that, when mapped and blocked by CHKDSK, appear to “steal” significant portions of your hard drive’s capacity. Dramatization: actual failing hard drive may not spontaneously combust.Image: Sandra.Matic / ShutterstockThis is expected behavior, and it means that those sectors, and any data potentially stored on them, have failed, even if you or your operating system didn’t realize it yet. CHKDSK will attempt to recover data from bad sectors when using the /r parameter, but some data may be corrupted and unrecoverable. Therefore, make sure to always keep good backups of all of your important data, and don’t blame CHKDSK (i.e., kill the messenger) for confirming that your PC’s hard drive is about to kick the proverbial bucket. Looks like the disk you are trying to check is a raw volume and windows assigned a different letter to the volume you really want to check. Try typingDiskpartAfter Diskpart comes up: DiskpartList DiskDiskpartselect disk 0 or whatever number is the disk you want to selectDiskpartList volumenotice the drive letter assigned to the volume you want to check (volume is just a name for a partition that’s been assigned a drive letter. Prior to formatting the volume is raw)Diskpartexittype: chkdsk your drive letter: /f /r (no brackets around drive letter).
Try booting into the Windows Recovery Environment (RE) from a windows installation disk; go to repair my computer; advanced; and then startup repair. Might fix startup issues. If that doesn’t work try using system restore from the Windows Recovery Environment (RE). Also, research using Diskpart from the command prompt and making sure your system reserved partition as the active partition if startup repair doesn’t work.
If your C: drive partition is marked as active, system will not boot and go into a loop. The system reserved partition that Windows 10 creates has all the bootup files on it that then boots windows from the c: system partition. Keep in mind that Diskpart might list the volume with a different letter than c: depending on how many partitions are on the drive. You can then also run chkdsk /f /r on the system reserved partition to make sure that partiton has no errors on it.
If all else fails, remove your drive and hook it up via a usb to SATA cable or USB external docking station and copy all you data off the drive with another computer. Then buy a new drive and reinstall the OS and recopy your data back to your new drive in the system. WARNING: Be careful using Diskpart. Gta san andreas multiplayer servers download. Only use after backing your data off the drive first and after trying startup repair or system restore. Only use to mark the recovery partition as active unless you are comfortable using Diskpart.