I have 4 disks in my PC. C (75GB) is given over to Windows XP Pro and installed software D & E (400GB each) are working disks and storage and F is a 1TB disk used for backing up the other 3.
After an initial full backup, I scheduled Windows backup to run an incremental backup on each disk on a daily basis (at different times) and all worked fine for a long time.
Recently I noticed that the backup file sizes were much smaller than the amount of data on each of the disks (by at least an order of magnitude). So I deleted them and recreated them by running the full manual backups again. Once again the backup files were approximately the same size as the known quantity of data on each of the respective disks. But within a matter of days they had shrunk again. I am not using any form of compression on any of the disks. Nothing significant has changed as far as I know.
Can anyone suggest what's going on?
After an initial full backup, I scheduled Windows backup to run an incremental backup on each disk on a daily basis (at different times) and all worked fine for a long time.
Recently I noticed that the backup file sizes were much smaller than the amount of data on each of the disks (by at least an order of magnitude). So I deleted them and recreated them by running the full manual backups again. Once again the backup files were approximately the same size as the known quantity of data on each of the respective disks. But within a matter of days they had shrunk again. I am not using any form of compression on any of the disks. Nothing significant has changed as far as I know.
Can anyone suggest what's going on?