Abstract: A banknote validator having a housing, a validation sensor; and a banknote drive mechanism. The banknote drive mechanism may be arranged to transport a banknote from an input aperture to a stacking device. The banknote drive mechanism may delimit a first banknote pathway proximal to an input aperture, and a second banknote pathway proximal to the stacking device. A pivotable security gate arrangement may be included that is resiliently biased to project into the second banknote pathway.

Abstract: A banknote validator having a housing, a validation sensor; and a banknote drive mechanism. The banknote drive mechanism may be arranged to transport a banknote from an input aperture to a stacking device. The banknote drive mechanism may delimit a first banknote pathway proximal to an input aperture, and a second banknote pathway proximal to the stacking device. A pivotable security gate arrangement may be included that is resiliently biased to project into the second banknote pathway.

Abstract: A method for verifying data written to a magnetic disk in a disk drive recording system incorporates a read-verify after write ("RVaW") procedure. For each Write command issued to the disk drive, a disk drive controller will ensure that the written data can be read back and verified successfully, before informing a host computer that the Write command is complete and the drive is ready to receive another command. If a pre-determined number of verification cycles does not result in a successful read-verify, then it is assumed that the physical location of the sector or sectors in error is permanently corrupted, and an attempt is then made to rewrite the data to spare sectors.