CheckDiskGUI

If your Mac is running slowly, crashing, or just generally misbehaving, the problem may be your disk. Both solid-state and rotational hard drives can be the most error-prone components in your Mac. Slow performance, sudden application crashes, and even computer crashes can be attributed to a malfunctioning hard drive. If you suspect a hard drive problem, it will be one of two things. Volume structures damage or physical disk damage. Volume structures damage (or directory damage for recovering Windows users) refers to the data stored on a disk that keeps track of your photos, movies, music, and other files on the disk. The volume structures test in Techtool Pro can be used to identify this damage, while the Volume Rebuild tool can be used to repair it. If the volume structures test doesn’t find any problems, but you’re still thinking it’s a disk problem, then it might be the hardware of the disk itself. In this case, either the SMART check or the surface scan test can help.

Hard disk bad sector is the most common problem and the disk is not safe to store data any longer. The bad sectors will cause important data loss and blue screen errors sometimes, and even slow disk speed. Macrorit Disk Scanner is a third-party portable disk surface test and hard drive health diagnostic tool, which provides you with better options and performance than a Windows native disk scanner. With the fastest algorithm, this disk scanner-free software usually could reach the maximum speed that is supported by the device. It is compatible with all recent versions of Microsoft Windows - both client and server and supports major storage device types such as IDE, SATA HDD and SSD, SCSI, FireWire, hardware RAID, flashcards, and more. Install and launch the Macrorit Disk Scanner, and choose the disk you want to check. Easy to find where are the bad sectors are in the scan log. Surface test on hard drives and you can define the scan area.