A method for managing of the flash - storing with mixed types of storage devices with the use of a finely - granulated allocation logic to physical memory addresses

摘要

The invention relates to a method for managing a is (fls) for a computer system (cs) with a plurality of flash chips (fc), which in a plurality of separately erasable physical memory blocks are divided, and this memory blocks have a limited maximum erase frequency, and the memory blocks are divided into writable pages, which in turn are subdivided in addressable subpages, and the subpages of a computer system via logical sector addresses (lba), which by means of an address conversion structure in physical subpageadressen (pba) are reacted,wherein, in the flash memory two regions with different types of the flash chips are present, and the first region (bl) single - level - flash chips slc with a very high maximum erase frequency and the second region (b2) multi - level - flash chips mlc with a lower maximum erase frequency and for each storage block contains the number of the performed deletions in a counter (ec) is counted, and is in the process of writing to the address translation table of the logic sector addresses (lba) in physical subpageadressen (pba) is effected such that the sectors in subpages of the memory blocks of the first region (bl) are described, and wherein when so many write operation in the first region (b1) have taken place, that now an upper threshold value (s_{S, o}) for a degree of filling (f_S) on written memory blocks in the first region (b1) is reached, in the course of a garbage collection in the first region (b1) is a written memory block with a low counter is sought, the valid subpages in a memory block of the second region (b2) are transmitted, the address assignments for the transmitted subpages be updated, and the memory block of the first region is erased and as a buffer block is made available for further writing operations