A pattern is pre-written using a pre-erase or pre-conditioning magnetic field applied within at least part of a target track of a hard disk via a first write transducer prior to the target track being written. Subsequent to the pre-writing, target user data is written to the part of the target track.

A pattern is pre-written using a pre-erase or pre-conditioning magnetic field applied within at least part of a target track of a hard disk via a first write transducer prior to the target track being written. Subsequent to the pre-writing, target user data is written to the part of the target track.

A control circuit to achieve irretrievable erasure of data in a mobile phone comprises a control unit, a SIM unit and a memory unit. The SIM unit is coupled with the control unit and the memory unit. The control unit can provides a delete signal to totally delete data of the memory by the SIM unit.

A control circuit to achieve irretrievable erasure of data in a mobile phone comprises a control unit, a SIM unit and a memory unit. The SIM unit is coupled with the control unit and the memory unit. The control unit can provides a delete signal to totally delete data of the memory by the SIM unit.

The present invention provides a magnetic head for erasing data on a magnetic tape, the magnetic head comprising a body having an elongate magnet mounted thereon, and a plurality of magnetisable portions in magnetisable communication with the magnet, the plurality of magnetisable portions being aligned with the elongate magnet and forming at least a portion of a substantially planar external surface of the magnetic head. The present invention further provides a method and system for erasing data on a magnetic tape using said magnetic head

A single magnetic pulse degaussing apparatus for use in erasing information contained on magnetic recording or storage media. A degaussing chamber for receipt of magnetic forces above 2.0 Tesla is accessible by upper and lower rotary actuated doors. The internal flux of a coil is measured by the current passing through the coil during the discharge cycle to provide a flux versus time measurements. The measurements are inserted into a performance verification algorithm to assure sufficient time for media destruction has taken place before releasing the media from the degaussing chamber.

A method of data clearing of a hard disk comprises search a last target logic block of a target hard disk according to a predetermined sequence. Stored data in the target logic block is read for determining whether the stored data includes disk array information. The stored data of the target logic block is cleared while the stored data includes the disk array information. By accurately clearing minimum data, a data clearing process of the target hard disk is completed. By comparing with the full disk format manner, an effective of data clearing is improved. An apparatus and a computer readable storage medium applying the method are also disclosed.

A method of data clearing of a hard disk comprises search a last target logic block of a target hard disk according to a predetermined sequence. Stored data in the target logic block is read for determining whether the stored data includes disk array information. The stored data of the target logic block is cleared while the stored data includes the disk array information. By accurately clearing minimum data, a data clearing process of the target hard disk is completed. By comparing with the full disk format manner, an effective of data clearing is improved. An apparatus and a computer readable storage medium applying the method are also disclosed.

A method of data clearing of a hard disk comprises search a last target logic block of a target hard disk according to a predetermined sequence. Stored data in the target logic block is read for determining whether the stored data includes disk array information. The stored data of the target logic block is cleared while the stored data includes the disk array information. By accurately clearing minimum data, a data clearing process of the target hard disk is completed. By comparing with the full disk format manner, an effective of data clearing is improved. An apparatus and a computer readable storage medium applying the method are also disclosed.

A method of data clearing of a hard disk comprises search a last target logic block of a target hard disk according to a predetermined sequence. Stored data in the target logic block is read for determining whether the stored data includes disk array information. The stored data of the target logic block is cleared while the stored data includes the disk array information. By accurately clearing minimum data, a data clearing process of the target hard disk is completed. By comparing with the full disk format manner, an effective of data clearing is improved. An apparatus and a computer readable storage medium applying the method are also disclosed.