Re: Cannot create backup disks Inspiron 620
You should be able to do a Dell Datasafe Recovery to a 16 gig or larger usb flash drive that would include the diag and recovery partition. Systems acting as you have described are not Dell Factory Setup but rather have been cloned using a utility like Ghost or Apricorn or Acronis. Unfortunately the Datasafe 2.0 partition is encrypted and cannot be cloned.
If this system came from an authorized Dell Dealer insist on getting it replaced with one that has a valid F8 factory restore partition.