A disk storage subsystem for interfacing with a parallel path, a

Details A disk storage subsystem for interfacing with a parallel path, a A disk storage subsystem for interfacing with a parallel path, a

1995-06-06

1996-09-10

Eng, David Y.

Boots, shoes, and leggings

3642323, 3642362, 3649338, G06F 1200

Patent

active

055554024

ABSTRACT:
Disclosed is a solid state disk emulator system for significantly improving access time, i.e., improving both the seek time and the rotational latency. The disk emulator complies with the SMD interface convention and thus to the central processor and the SMD disk controller, the disk emulator appears as a disk with virtually a zero access time. In one embodiment, the disk emulator includes a volatile storage medium, a parallel path, a nonvolatile media and a control circuit. The control circuit can store parallel data received on the parallel path into the nonvolatile media and supply parallel data from the nonvolatile storage media on the parallel path. Moreover, in a first mode of operation the control circuit can store data received from a disk controller at a location in the volatile storage medium and in a second mode of operation, the control circuit can retrieve data from the volatile storage medium and provide the retrieved data to the disk controller.

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IBM Technical Disclosure Bulletin, vol. 27/No. 18, pp. 896-899 (Jun. 1984).

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