Once you have done that, you need to check the names of the volumes that are currently connected to your system. The first thing you need to do is start Terminal (/Go/Utilities/Terminal). In this guide, I will show you how you can repair a disk on Mac OS X using the command-line. This could come in handy in situations when you can't or don't want to use Disk Utility for some reason. However, this can also be performed using the command-line. Mac OS X comes with an easy-to-use application, called Disk Utility, that allows users to verify and repair hard disks using a graphical user interface and it is recommended for most Mac users that are not comfortable using the terminal. The r parameter will try to find bad sectors and help restore any readable information.How to Repair a Disk on Mac OS X from Command Line

The /f option will try to fix any errors found on the disk.Ĭhkdsk R: /r, where R is the letter of the drive you want to recover. chkdsk R: /f, where R is the drive letter for which you want to scan. Next, there are several options for fixing disk errors:ġ. Then click on 'Run' and enter 'cmd' in the field, then press Enter.Įnter 'chkdsk' to open the utility in read-only mode and again press Enter. 3 ways to run CHKDSKīoot your computer and click on the Start button. Remember: CHKDSK is not harmless at all and must be used with some caution and only in really difficult situations. Therefore, you definitely need to know how to use CHKDSK, and this is where you will learn how to do it. Quite often, the operation of this utility saves many users who are stumped. Windows has a built-in CHKDSK function, which is used to analyze hard disk errors, bad sectors and then automatically recover them.

Mac terminal commands for check disk