Method of performing reliable updates in a symmetrically blocked

Details Method of performing reliable updates in a symmetrically blocked Method of performing reliable updates in a symmetrically blocked

1997-06-30

2000-07-11

Yoo, Do Hyun

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711170, 711173, 707206, G06F 1730

Patent

active

060887591

ABSTRACT:
Methods of allocating, writing, reading, de-allocating, re-allocating, and reclaiming space within a nonvolatile memory having a bifurcated storage architecture are described. In one embodiment, a method of reliably re-allocating a first object stored within a block erasable nonvolatile memory includes the step of allocating space for a second object. A write of the second object is initiated and the writing of the second object is tracked. In another embodiment, a method of re-allocating a first object stored within a block erasable nonvolatile memory includes the step of invalidating the first object, if the first object has an unreliable type of recovery level. Space is allocated for the second object. A write of the second object is initiated and the writing of the second object is tracked. In another embodiment, a method of reliably re-allocating a first object stored within the block erasable nonvolatile memory includes the step of allocating space for the second object. A write of the second object is initiated and the writing of the second object is tracked. The first object is invalidated after completion of writing the second object, if the first object has a reliable type of recovery. In one embodiment, the first object resides within a first portion of nonvolatile memory and the instructions for performing the described methods reside in a second portion of nonvolatile memory. The first and second portions can reside within a same nonvolatile memory such as a symmetrically blocked flash electrically erasable programmable read only memory.

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