Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1995-07-31
1998-12-01
Chan, Eddie P.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
711104, 711156, 711203, G06F 1210
Patent
active
058453130
ABSTRACT:
A nonvolatile semiconductor mass storage system and architecture can be substituted for a rotating hard disk. The system and architecture avoid erase cycles each time information stored in the mass storage is changed. Erase cycle are avoided by programming an altered data file into an empty mass storage block rather than over itself as a hard disk would. Periodically, the mass storage will need to be cleaned up. These advantages are achieved through the use of several flags, and a map to correlate a logical block address of a block to a physical address of that block. In particular, flags are provided for defective blocks, used blocks, and old versions of a block. An array of volatile memory is addressable according to the logical address and stores the physical address
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Assar Mahmud
Estakhri Petro
Bragdon Reginald G.
Chan Eddie P.
Donnelly Oppenheimer W.
Hamrick Claude A. S.
Imam Maryam
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