| 摘要 |
A semiconductor mass storage system (100) and architecture can be substituted for a rotating hard disk. The system and architecture avoid an eras cycle each time information stored in the mass storage is changed. Erase cycles are avoided by programming an altered data file into an empty mass storage block (step 202-206) rather than over itself as hard disk would. Periodically, the mass storage will need to be cleaned up (step 204). Secondly, means are provied for evenly using all blocks in the mass storage (Fig. 7). These advantages are achieved through the use of several flags (200), a map to correlate a logical address of a block to a physical address of that block (308, 408) and a count register for each block. In particular, flags are provided for defective blocks (118), used blocks (112), old version of a block (104, 116), a count to determine the number of times a block has been erased and written and erase inhibit flag (200). |
