Abstract:
A sensor system which disables the write gate (54) of a hard disk drive (10) when the drive unit is subjected to a threshold level of shock or vibration. The sensor system includes a transducer (46) which can sense any rotational acceleration of the disk drive (10). The transducer (46) produces an output voltage that is proportional to the acceleration of the drive unit. The output voltage is compared to a reference voltage by a logic circuit which disables the write gate (54) of the disk drive (10), if the output voltage of the transducer (46) is equal to or greater than the reference voltage.
Abstract:
A portable pocket-size hard disk drive unit (10) that conforms with the PCMCIA type III format. The drive unit includes a housing (12) that contains a pair of magnetic disks (48, 50) that are coupled to a hub assembly. The hub assembly has a hub (52) which is rotated about a spindle shaft (54) by an electric motor (66) that is located within the hub. The hub assembly also has a pair of fluid bearings (96, 100) which have a small profile and are rugged enough to withstand the type of external loads that may be applied to a hand held portable disk drive unit. The magnetic disks rotate relative to a head/actuator assembly which is coupled to a connector (14) located on the end of the housing. The connector is adapted to mate with a connector in a computer system to couple the magnetic disks and disk drive assembly with the computer.
Abstract:
A hard disk drive which meets the type II PCMCIA specifications is provided. The disk drive has an outer housing (12) and a connector (14) which allow the drive to be plugged into a host computer. All of the electrical components of the drive are mounted to a single printed circuit board (90). The circuit board is approximately one-third the length of the housing and is located between the disk (18) and the connector. The reduction in the board length allows the circuit board to be placed in the same plane as the disk and therefore does not add to the thickness of the overall assembly.
Abstract:
A portable pocket-size hard disk drive unit (10) that conforms with the PCMCIA type III format. The drive unit includes a housing (12) that contains a pair of magnetic disks (48, 50) that are coupled to a hub assembly. The hub assembly has a hub (52) which is rotated about a spindle shaft (54) by an electric motor (66) that is located within the hub. The hub assembly also has a pair of fluid bearings (96, 100) which have a small profile and are rugged enough to withstand the type of external loads that may be applied to a hand held portable disk drive unit. The magnetic disks rotate relative to a head/actuator assembly which is coupled to a connector (14) located on the end of the housing. The connector is adapted to mate with a connector in a computer system to couple the magnetic disks and disk drive assembly with the computer.
Abstract:
A hard disk drive which meets the type II PCMCIA specifications is provided. The disk drive has an outer housing (12) and a connector (14) which allow the drive to be plugged into a host computer. All of the electrical components of the drive are mounted to a single printed circuit board (90). The circuit board is approximately one-third the length of the housing and is located between the disk (18) and the connector. The reduction in the board length allows the circuit board to be placed in the same plane as the disk and therefore does not add to the thickness of the overall assembly.