| 摘要 |
Provided is a flash storage system in which the amount of writes to the flash memory of the flash storage is reduced without detriment to the performance of the storage controller and the flash storage. The storage system issues a compare/write request to the flash storage when the storage controller collectively writes read changed data including an unchanged portion to the flash storage. Upon receiving the compare/write request, the flash storage reads, from the flash memory, the old data to be updated which corresponds to the write data, compares the read old data with the write data, and writes, to the flash memory, only the portions of the write data that differ from the corresponding portions of the read old data. |
