When File Scavenger® hangs on reading bad sectors, it will advise you to use this dialog to exclude the offending sectors from the next scan.
Alternatively, you can use Disk Recoup to read and clone the bad drive to a new blank drive. Then recover data from the new drive to avoid hardware errors. Visit http://www.quetek.com/diskrecoup for more information.
Another use for this is to focus on the relevant volumes. Considering the example below:
Disk 1: Total size of 20GB, formatted as drive D: with 4 GB followed by drive E: with 16 GB.
Suppose you are scanning Disk 1 in the Long Scan mode and only drive D: is relevant, you can exclude sectors belonging to drive E: to reduce scan time.
4GB is equivalent to 4 x (1073741824/512) = 8388608 sectors. (If you know the exact size of drive D: in bytes, you can divide it by 512 to get the number of sectors)
Add one track (usually 63 sectors) for the master boot record.
Add some safety margin for rounding off, etc.
You can then exclude from,
for example, sector 8400000 to the last sector.
The disk or volume being scanned.
The valid range of sector numbers for this drive.
Specifies the first sector of a range to be excluded.
Specifies the last sector of a range to be excluded.
Adds this range to the list.
Removes this range from the list.
Ranges of sectors to be skipped during the scan.