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US 2008/0174908 A1Published application
Adaptive temperature and altitude compensation for writing on disk drives
AssigneeSamsung Electronics Co., Ltd.
InventorRichard Wang
Life of this patent
Estimating the term…
Abstract
A hard disk drive that performs a write verify routine to determine optimal write parameters for the heads of the drive. The write verify routines are performed until a successful write operation has occurred. The write verify routine is disabled if there has been a predetermined number of previously acceptable write operations.
Claims15
A hard disk drive, comprising:
- a housing;
- a disk;
- a spindle motor that rotates said disk;
- a head coupled to said disk, said head writes data onto said disk in accordance with at least one write parameter;
- an actuator arm coupled to said head;
- a voice coil motor coupled to said actuator arm;
- a temperature sensor that senses a drive temperature;
- and,
- a controller coupled to said head and said temperature sensor, after boot up of the hard disk drive said controller performs a write verify routine for all user write commands to ensure all writes are good, if said write verify routine is not satisfactory said controller varies said write parameter to compensate for the disk temperature and altitude of the hard disk drive and performs another write verify routine, said controller continues to vary said write parameter and performs a write verify routine until a successful write verify routine is performed, said controller disables said write verify routine if a predetermined number of consecutive successful write verify routines have been achieved.
6 more elements
A hard disk drive, comprising:
- a housing;
- a disk;
- a spindle motor that rotates said disk;
- a head coupled to said disk, said head writes data onto said disk in accordance with at least one write parameter;
- an actuator arm coupled to said head;
- a voice coil motor coupled to said actuator arm;
- a temperature sensor that senses a drive temperature;
- and,
- controller means for performing a write verify routine upon a boot up of the hard disk drive, if said write verify routine is not satisfactory said controller means varies said write parameter to compensate for the disk temperature and altitude of the hard disk drive and performs another write verify routine, said controller means continues to vary said write parameter and performs a write verify routine until a successful write verify routine is performed, said controller means disables said write verify routine if a predetermined number of successful write verify routines have been achieved.
6 more elements
A method for writing data onto a disk of a hard disk drive, comprising:
- booting up a hard disk drive;
- sensing a temperature of the hard disk drive;
- performing a write verify routine on a head of the hard disk drive for all write commands from user;
- varying a write parameter if the write verify routine is not satisfactory, to compensate for the temperature and an altitude of the hard disk drive;
- performing additional write verify routines and varying the write parameter until a successful write verify routine is performed;
- and,
- disabling the write verify routine if a predetermined number of successful write verify routines have been achieved.
4 more elements
Dependencies are inferred from the claim text.