Abstract: This application discloses a hard disk drive using a self-resonant frequency band of a Voice Coil Motor far above its operational frequency band to predict Rapid Off Track events before its head stack assembly can deliver the disruption to the slider writing a track. A circuit board and/or an integrated circuit are disclosed in various embodiments to predict the ROT events using the self-resonant frequency band and/or to respond to the prediction to suppress the slider writing.

Abstract: This application discloses a hard disk drive using a self-resonant frequency band of a Voice Coil Motor far above its operational frequency band to predict Rapid Off Track events before its head stack assembly can deliver the disruption to the slider writing a track. A circuit board and/or an integrated circuit are disclosed in various embodiments to predict the ROT events using the self-resonant frequency band and/or to respond to the prediction to suppress the slider writing.

Abstract: A disk storage device is disclosed including at least one disk unit, a first processor to control the disk unit making possible access of its data and a second processor communicating with the first while operating a file system for disk access and at least one network interface. The network interface is operated to receive an access request. The file system is operated based upon the access request to organize access of the data to create an access response. The disk units are disclosed as a hard disk unit and/or a solid state data unit. The disk storage unit may further include at least one multi-media interface and/or at least one serial interface and/or a Bluetooth interface. An integrated circuit and an assembled circuit board are disclosed including both processors.

Abstract: A disk storage device is disclosed including at least one disk unit, a first processor to control the disk unit making possible access of its data and a second processor communicating with the first while operating a file system for disk access and at least one network interface. The network interface is operated to receive an access request. The file system is operated based upon the access request to organize access of the data to create an access response. The disk units are disclosed as a hard disk unit and/or a solid state data unit. The disk storage unit may further include at least one multi-media interface and/or at least one serial interface and/or a Bluetooth interface. An integrated circuit and an assembled circuit board are disclosed including both processors.

Abstract: This invention includes a method providing at least two boot environments with only one hard disk drive, by using at least two disk surfaces within the hard disk drive. The invention includes the hard disk drives implementing the method. The hard disk drive may include more than two disk surfaces and support more than two boot environments. The invention includes making the hard disk drive, and the product of that process. The invention includes computer systems including at least one of these hard disk drives. The invention also includes removable storage systems which include at least one hard disk drive, and which may communicate via a wireline and/or wireless physical transport with a computer system.

Abstract: A hard disk drive that is capable of inhibiting a write operation when a varying fly height is detected. The disk drive includes a filter circuit that filters a read signal read from a disk. By way of example, the filter circuit may be a low pass filter with a frequency range of 40 to 300 KHz. If the flying height is varying, for example in response to vibration in the drive, the read signal will have a low frequency component. The low pass filter will output the low frequency component. The existence of the low frequency component will cause the disk drive to inhibit a write operation on the disk.

Abstract: Making backups of active data stored in hard disk drive, by copying one or more disk surfaces within the hard disk drive. The hard disk drives implement the method. The hard disk drive may include more than two disk surfaces. Copying a second disk surface to a first disk surface may restore the first disk surface from the backup found on the second disk surface. The invention includes computer systems, which include at least one of these hard disk drives. The invention also includes removable storage systems, which include at least one of the hard disk drives.

Abstract: This invention increases reliability of hard disk drive data, continuously mirroring at least two disk surfaces in the hard disk drive. The invention includes hard disk drives implementing this method. In a hard disk drive including more than two disk surfaces, mirroring more than two disk surfaces may be preferred. The invention includes computer systems including at least one of these hard disk drives. These computers systems, include but are not limited to, notebook computers, desktop computers, servers, database engines, personal digital assistants, handheld computers, and simulation accelerators. The invention also includes removable storage systems which include at least one hard disk drive, and which may communicate via a wireline and/or wireless physical transport with a computer system.

Abstract: This invention includes a method providing at least two boot environments with only one hard disk drive, by using at least two disk surfaces within the hard disk drive. The invention includes the hard disk drives implementing the method. The hard disk drive may include more than two disk surfaces and support more than two boot environments. The invention includes making the hard disk drive, and the product of that process. The invention includes computer systems including at least one of these hard disk drives. The invention also includes removable storage systems which include at least one hard disk drive, and which may communicate via a wireline and/or wireless physical transport with a computer system.

Abstract: The invention includes head gimbal assemblies, actuators, and disk drives containing at least one airfoil boundary reducing air flow turbulence about a slider induced by said head gimbal assembly accessing a rotating disk surface.

Abstract: The invention includes head gimbal assemblies, actuators, and disk drives containing at least one airfoil boundary reducing air flow turbulence about a slider induced by said head gimbal assembly accessing a rotating disk surface.

Abstract: A method for writing servo information in a hard disk drive. The method includes initially writing a seed servo pattern with a servo writer and then self writing the rest of the servo patterns with the heads of the drive. Each head should preferably have a write element that is sufficiently offset from a read element toward an inner diameter of the disks. This will insure that the heads will not write over an existing servo pattern.

Abstract: An environmental chamber that can be used to test a device under test such as a hard disk drive. The environmental chamber may include an electronically controlled shutter that controls the flow of controlled particles from a second chamber to a first chamber. The controlled particles flow to a device under the test located within the first chamber. The shutter can be closed when a predetermined threshold of contaminants is detected by the environmental chamber. This two-chamber method provides a stable and uniform density (?) of particle environment around the drive.

Abstract: An environmental chamber that can be used to test a device under test such as a hard disk drive. The environmental chamber may include an electronically controlled shutter that controls the flow of controlled particles from a second chamber to a first chamber. The controlled particles flow to a device under the test located within the first chamber. The shutter can be closed when a predetermined threshold of contaminants is detected by the environmental chamber. This two-chamber method provides a stable and uniform density of particle environment around the drive.

Abstract: A magnetic disk which includes a thin film magnetic layer resistant to thermal erasures caused by a rise in localized temperature in the disk due to head disk interference includes a substrate having a thermal diffusivity of less than about 2.times.10.sup.-6 m.sup.2 /sec and a magnetic layer for storing information which is subject to erasure upon such use in localized temperature generated by the head disk interference. An underlayer below the magnetic layer is provided for orienting crystalline structure of the magnetic layer, and the heat sink layer directly above the substrate and directly below the underlayer has a single material such as chromium. The heat sink layer has sufficient thermal diffusivity and sufficient thickness for dissipating heat generated by the rise in localized temperature caused by head disk interference to prevent the erasure of stored information in the magnetic layer.

Abstract: A transducer suspension assembly comprises mounting base plate (40), a spring element (42), a load beam (44) and a flexure (46) having a reduced-footprint slider (60). A partial etch (50) is formed in the spring element of the suspension. The spring element further includes a pair of lateral flanges (54). The flexure contains a second pair of flanges (64) and two longitudinal arrays of openings (70 and 72) formed in the flanges. A shortened, high-stiffness service loop (69) is connected to the reduced-footprint slider.