A hard crash typically occurs on an optical disc when it makes contact with particles on its surface.
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External hard drives are used primarily to complement an internal hard disk.
A. 对
B. 错
External hard disks use different technology than internal hard disks.
A. 对
B. 错
Disk caching improves hard-disk performance by compressing files.
A. 对
B. 错
Disk caching uses a combination of hardware and software.
A. 对
B. 错