Systems and methods are disclosed for detecting shingled overwrite errors. When a read error is encountered when reading from shingled recording tracks, a processor may determine whether the read error is an error caused by shingled overwriting. The processor may determine whether the read error is caused by shingled overwriting by determining read signal quality of one or more sectors preceding the read error, such as based on a bit error count or bit error ratio (BER), and comparing the read signal quality to a threshold value. The processor may determine that the read error is caused by shingled overwriting when the read signal quality value is lower than the threshold.

A recording and reproducing device includes: a reading unit that reads production information from a recording medium of a magnetic tape cartridge, the magnetic tape cartridge including a magnetic tape, and the recording medium other than the magnetic tape and on which the production information is recorded, the production information being information regarding the magnetic tape obtained in a production process of the magnetic tape cartridge; and a control unit that performs, as an initialization process of the magnetic tape cartridge, control of recording the production information on the magnetic tape and invalidating the production information in the recording medium.

A data storage method, apparatus and system that increase drive capacity, minimize latency, reduce write access time and improve drive lifetime is described in this invention. In one embodiment, the data storage device described here is a composite hard disk drive comprises a number of recording media platters labeled from 1 to n, where n is greater than or equal to 2; wherein there exist two positive integer n1 and n2, where n1 and n2 are between 1 and n; n1 is not equals to n2; wherein the data tracks for the media platters n1 and n2 are written based on one of the following: 1) different RTs; 2) different WAs; or 3) different RTs and different WAs.

An information processing apparatus, for recording data in a magnetic storage medium by a shingled magnetic recording, and a method of controlling this, when a rewrite of data stored in the magnetic storage medium is instructed, copy data of a zone in which rewrite target data is stored other than the rewrite target data into a vacant zone of the magnetic storage medium; store, to the vacant zone into which the data is copied, the rewrite target data, delete by overwriting an entirety of the zone in which the rewrite target data is stored with predetermined data, and register the overwritten zone as an unused area.

A storage device controller addresses consecutively-addressed portions of incoming data to consecutive data tracks on a storage medium and writes the consecutively-addressed portions to the consecutive data tracks in a non-consecutive track order. In one implementation, the storage device controller reads the data back from the consecutive data tracks in a consecutive address order in a single sequential read operation.

A system includes a read/write module and a caching module. The read/write module is configured to access a first portion of a recording surface of a rotating storage device. Data is stored on the first portion of the recording surface of the rotating storage device at a first density. The caching module is configured to cache data on a second portion of the recording surface of the rotating storage device at a second density. The second portion of the recording surface of the rotating storage device is separate from the first portion of the recording surface of the rotating storage device. The second density is less than the first density.

A Data Storage Device (DSD) includes at least one disk surface and a plurality of actuators for accessing data stored on the at least one disk surface. A workload is determined for each actuator of the plurality of actuators, and a logical to physical mapping is modified based on at least one workload. The logical to physical mapping associates logical addresses of data with physical locations for storing the data on the at least one disk surface.

Technology is disclosed for deferring storage operations (e.g., writes or reads) during hostile events. When a data storage device experiences a hostile event, e.g., a vibration, shock, etc. contact by a head of the data storage device with a disk surface can cause errors or indeed damage. The technology can cause a data storage device to suspend storage operations until the hostile event is no longer detected.

A storage device controller is configured to select one of multiple written track widths for a storage location based on a write attribute of data to be recorded at the storage location. According to one implementation, the storage device controller is further configured to select a power level for a heat-assisted magnetic recording (HAMR) device based on the write attribute.

A system includes a read/write module and a caching module. The read/write module is configured to access a first portion of a recording surface of a rotating storage device. Data is stored on the first portion of the recording surface of the rotating storage device at a first density. The caching module is configured to cache data on a second portion of the recording surface of the rotating storage device at a second density. The second portion of the recording surface of the rotating storage device is separate from the first portion of the recording surface of the rotating storage device. The second density is less than the first density.