Method and circuitry for increasing reserve memory in a solid st

Details Method and circuitry for increasing reserve memory in a solid st Method and circuitry for increasing reserve memory in a solid st

1993-02-19

1996-12-17

Robertson, David L.

395427, 39549701, G06F 1310

Patent

active

055862853

ABSTRACT:
A solid state memory disk with increased reserve memory is described. The solid state memory disk includes an array of solid state memory devices for storing user data and reserve memory, which includes both free memory and dirty memory. The solid state memory disk also includes a controller, a clean-up state machine, and a data compressor. The data compressor increases reserve memory by compressing data received from a host and coupling compressed data to the array of memory devices under the control of the controller. In response to write commands from the host, the controller writes a first sector data, which has been compressed, to a first location in a first block within a memory device. Reserve memory within the array is thus increased, so long as the maximum number of sectors the host is allowed to write is less the average compression ratio of the data compressor multiplied by the capacity of the solid state disk. A method of increasing reserve memory in a solid state disk is also described.

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