According to one embodiment, a magnetic disk device including a disk, a head which writes data to the disk and reads data from the disk, and a controller which sets a first DOL for a first sector group and a second DOL for a second sector group to different values, the first sector group including one or more first sectors and a first parity sector, the first sectors which allow an error correction process to be performed for each track based on the first parity sector, and are continuously arranged in a circumferential direction of the disk from the first parity sector, the second sector group including one or more second sectors which allow no error correction process to be performed for each track, and are continuously arranged in the circumferential direction.

According to one embodiment, a magnetic disk device including a disk, a head which writes data to the disk and reads data from the disk, and a controller which sets a first DOL for a first sector group and a second DOL for a second sector group to different values, the first sector group including one or more first sectors and a first parity sector, the first sectors which allow an error correction process to be performed for each track based on the first parity sector, and are continuously arranged in a circumferential direction of the disk from the first parity sector, the second sector group including one or more second sectors which allow no error correction process to be performed for each track, and are continuously arranged in the circumferential direction.

The presently disclosed technology teaches integrating disc drive electronics into a transducer head. Decreased electrical transit times and data processing times can be achieved by placing the electronics on or within the transducer head because electrical connections may be made physically shorter than in conventional systems. The electronics may include one or more of a control system circuit, a write driver, and/or a data buffer. The control system circuit generates a modified clock signal that has a fixed relation to phase and frequency of a bit-detected reference signal that corresponds to positions of patterned bits on the disc. The write driver writes outgoing data bits received from an external connection to off-head electronics directly to the writer synchronized with the modified clock signal. The data buffer stores and converts digital data bits sent from the off-head electronics to an analog signal that is synchronized with the modified clock signal.

The technology disclosed herein pertains to a system and method for managing write failures in a disc drive. Implementations disclosed herein provide a method including monitoring write fault events per sector for a storage device, in response to a write fault event, updating a write fault repeat count table, wherein the repeat count table tracks a number of write fault repeat counts per sector, comparing a write fault repeat count for a sector to a predetermined threshold write fault repeat count, and in response to determining that the write fault repeat count for a sector is above the predetermined threshold write fault repeat count, performing a write-reassign operation.

The technology disclosed herein pertains to a system and method for managing off-track retry. An implementation of a method of determining offset direction for read off-track retry includes storing analog to digital converter (ADC) values of data read from a data sector by a data reader in a read channel buffer, calculating an indicator value of the distribution of the ADC values, determining an amount of offset for the data reader based on the indicator value, and moving the data reader by the amount of offset before performing a read retry operation.

A Permanent Magnet Degausser Mechanism for Destroying the Functionality of Data Bearing Components of Magnetic Media Data Bearing Devices. This permanent magnet degausser mechanism provides reconciliation and tracking with a unique. identification tag using a secure and proprietary database, destruction of the functionality of the data bearing components of magnetic media data bearing devices using an automated movement system, a NSA Certified high strength degausser, digital pre-degaussing and post-degaussing readings to indicate the completion of the process of destroying the functionality of the data bearing components including storage of readings and containment of the remains of the magnetic media devices for verification.

A Permanent Magnet Degausser Mechanism for Destroying the Functionality of Data Bearing Components of Magnetic Media Data Bearing Devices. This permanent magnet degausser mechanism provides reconciliation and tracking with a unique. identification tag using a secure and proprietary database, destruction of the functionality of the data bearing components of magnetic media data bearing devices using an automated movement system, a NSA Certified high strength degausser, digital pre-degaussing and post-degaussing readings to indicate the completion of the process of destroying the functionality of the data bearing components including storage of readings and containment of the remains of the magnetic media devices for verification.

Provided is a magnetic tape cartridge including: a case in which a magnetic tape on which a plurality of servo bands are formed is accommodated; and a storage medium provided in the case, in which the plurality of servo bands are formed at positions spaced apart from each other in a width direction of the magnetic tape along an entire length direction of the magnetic tape, and the storage medium stores pitch information capable of specifying a pitch in the width direction between the plurality of servo bands and distance information capable of specifying a distance between a plurality of servo reading elements that have read the plurality of servo bands.

A method begins by a processing module of a dispersed storage network (DSN) obtaining utilization information regarding a plurality of storage units of the DSN, where first and second sets of storage units support a first logical storage vault. The method continues with the processing module detecting a utilization imbalance between a first storage unit of the first set of storage units and a second storage unit of the second set of storage units based on the utilization information, where the first and second storage units are not a common storage unit. The method continues with the processing module executing a data storage function regarding the first logical storage vault based on the utilization imbalance.

Systems and methods are disclosed for implementing unequal error correction code (ECC) in multi-track recording. A device may comprise a circuit configured to implement an error correction coding scheme applying different code rate error correction codes on adjacent tracks within a same recording zone. The circuit may perform a read operation, including simultaneously detecting bits from a first track and a second track of the adjacent tracks, iteratively applying detected bits from the first track to perform adjacent track interference cancellation (ATIC) to decode bits from the second track, and iteratively applying detected bits from the second track to perform ATIC to decode bits from the first track.