Abstract: Provided are a computer program product, system, and method for determining a skew error signal (SES) offset used to determine an SES to adjust heads in a drive unit. A determination is made of a first difference in a first orientation with respect to a direction of movement of the recordable storage media based on first and second position information read by first and second servo read elements on a first head. A determination is made of a second difference in a second orientation with respect to the direction of movement of the recordable storage media based on third and fourth position information read by the first servo read element and a third servo read element on a second head. An offset, calculated based on the determined first and second difference, is used to generate an error signal to adjust the first and second heads.

Abstract: Selection of disk drive data tracks for the location of reserved area include providing a media disk with data tracks comprising a user data region. A location is assessed on the media disk with a highest frequency of adjacent track interference and far track interference-refresh potential. The location is then configured to be a reserved area where no user data is written. The reserved area has parameters that are read out first before the disk drive enters an operation enabled state for user interface.

Abstract: Apparatus for two dimensional data reading. In accordance with some embodiments, a magnetic read element has a plurality of read sensors positioned symmetrically about a pivot point with at least two of the read sensors configured to concurrently read two dimensional user data while being immune to skew angle misalignment.

Abstract: Method for operating a storage device with a tape and a head which is operable to read and/or write data from and respectively to the tape. The tape is moveable in a predetermined longitudinal direction. At least two consecutive current lateral tape positions of the tape with respect to a predetermined reference point are determined at a predetermined longitudinal capture position. A tape skew of the tape is determined dependent on the at least two determined lateral positions. The tape skew represents an angle between a current tape motion direction of the tape and the longitudinal direction. A skew control signal is determined dependent on the determined tape skew. A rotational head position of the head is controlled dependent on the skew control signal to align the head to the current tape motion direction in such a way that the head is operable to read and/or write data.

Abstract: A circuit for a high-density data recording channel includes a first data detector, a second data detector, one or more multiplexers and a sequence identifier. The first data detector generates a first data detector output, and the second data detector generates a second data detector output. The multiplexers change between a first mode and a second mode to alternately receive the first data detector output and the second data detector output. The sequence identifier receives a data sequence including at least one of a first data sequence, such as VFO data, and a second data sequence, such as random data. The second data sequence includes a greater number of signal levels than the first data sequence. The sequence identifier changes the multiplexers between the first mode and the second mode based on whether the data sequence is the first data sequence or the second data sequence. The data sequence includes a plurality of timing stages.

Abstract: A method to adjust the orientation of a read head comprising a first read element and a second read element, wherein the first read element and the second read element are separated by a distance, wherein the method moves a sequential information storage medium adjacent to the read head, determines a skew angle for the sequential information storage medium with respect to the read head using the first read element and the second read element, and encodes that skew angle in a computer readable medium.

Abstract: A method to correct a phase of a data sector due to rotational slip of a disk includes measuring a difference in the phase of a servo sector between a plurality of disks and adjusting an amount of cylinder skew of a logical data sector between the plurality of disks based on the measured difference in the phase of a servo sector between the plurality of disks.

Abstract: According to one embodiment, a media access method includes a head scanning each track of a magnetic recording medium while tilting with respect to a direction perpendicular to the track direction at all positions including a position with a skew angle of zero on the magnetic recording medium. The track includes at least one magnetic dot array. The core width of the head is set with respect to a pitch of magnetic dots in the track direction and a pitch in the direction perpendicular to the track direction so that the head does not simultaneously scan a plurality of magnetic dots while scanning one track.

Abstract: According to one embodiment, a storage device includes an area demodulator and a head position demodulator. The area demodulator demodulates a first demodulation signal and a second demodulation signal having a phase difference of 90° from a read signal by a head of an area demodulation pattern recorded on a medium. The head position demodulator receives the first demodulation signal and the second demodulation signal, and outputs a phase angle indicating a direction of a vector formed in a phase plane by the first demodulation signal and the second demodulation signal as a head position signal.