Soft RAID writes a random pattern out to every sector and then reads and verifies the pattern to make sure every sector on the disk is reliable.Once it has tested every sector, you can have Soft RAID start another pass through the disk.The actual validating of the volume is done by the Soft RAID driver, so you can start the validation process, quit the Soft RAID application and the validation process will keep going.
If the driver sees that you have started to read or write files on the volume, it stops validating for a second or two.
Then it resumes validating the volume where it left off.
You can think of it like checking the pressure on your spare tire; if you get a flat you have the peace of mind that your spare is ready to go.
Validation gives you the peace of mind that if any problem occurs, all the parity and mirror data is correct and up-to-date. They are not available on disks connected via USB or Fire Wire and may not be available if a disk is connected via some third party interface cards.
When you verify a disk, Soft RAID will read every sector on the disk to ensure that it can be read without errors.
If you encounter errors while verifying a disk, you should check the cables and power supply for your disk.If there is an error, the Soft RAID Monitor will warn you and will add an entry to the Soft RAID log file.The validation process will also run extra checks depending on the type of volume you have (see RAID level validation details below).However, always remember that certifying will erase all the data from your drive, so be sure to back up your data first.(It's not possible to restore data from a card that's been certified as the data has been overwritten with zeros.) Note: You must use If you want to test a disk without destroying the volumes on it, you can use Soft RAID to verify the disk.In addition, the more you write to an SD, the harder it is to find 'clean' areas to write to.