Patent ID: 6078520
Filing Date: 2000-06-20
Classification: G06F,G11C

Abstract:
A storage system having a semiconductor memory section comprising a storage section using a flash memory as a storage medium and a host system which transfers information to and from said semiconductor memory section,said semiconductor memory section including:an interface circuit transferring information to and from said host system;a control circuit controlling a read/write of information from/into said storage section and detecting an error incurring area of said storage section; andmemory management means retaining a used or unused state for each area of said storage section, upon detection of an error by said control circuit, for allocating an unused area as an alternate area in place of the error incurring area of said storage section and retaining a correspondence between the allocated alternate area and the error incurring area,said control circuit referencing said memory management means for controlling a read/write of information from/into said storage section.