14-05-2015, 02:33 PM
Just a thought.
Before you do a backup write down the dates of the two oldest backup files and then run backup.
Now check the date of the oldest backup file and see if it was once the second oldest backup file. It should dump the oldest one in order to make space for the new one.
If this is true then the backup files will be wiped starting with the oldest first leaving the most recent one if you fill the backup drive with some other unrelated files completely leaving only the newest backup file before disk full shows.
Also adding a copy of a folder larger than the remaining space will prove this by deleting the oldest backup file.
Modern computers tend to do this to help prevent fragmented drives and to use the full area of the physical disk inside the drive to even out wear of the surface.
Before you do a backup write down the dates of the two oldest backup files and then run backup.
Now check the date of the oldest backup file and see if it was once the second oldest backup file. It should dump the oldest one in order to make space for the new one.
If this is true then the backup files will be wiped starting with the oldest first leaving the most recent one if you fill the backup drive with some other unrelated files completely leaving only the newest backup file before disk full shows.
Also adding a copy of a folder larger than the remaining space will prove this by deleting the oldest backup file.
Modern computers tend to do this to help prevent fragmented drives and to use the full area of the physical disk inside the drive to even out wear of the surface.
