The test could take several hours for a large disk. It can be safely interrupted at any time.
This test scans a disk for bad blocks and checks the integrity of the data transferred.
The original data is temporarily removed from the disk then restored. For maximum safety, you should back up your data.
This test can be safely interrupted at any time.
This test scans a disk for bad blocks.
A read-only test will be performed since this disk is in use. A more thorough test can be performed when this disk can be unmounted. See Drive Setup Guide for information on how to make this disk unmountable.