Performing non-destructive testing on the disks using the -r option
You can perform non-destructive testing on the disk devices when you want to preserve the data.
To perform non-destructive testing on disks
To test disk devices containing data you want to preserve, you can use the -r option with the -m, -f, or -g options.
For example, to use the -m option and the -r option, you can run the utility as follows:
When invoked with the -r option, the utility does not use tests that write to the disks. Therefore, it does not test the disks for all of the usual conditions of use.