STORAGE SYSTEM

摘要

In a flash storage system, the amount of write to be performed to a flash memory of a flash storage can be reduced without deteriorating the performance of a storage controller and the flash storage. When the storage controller performs collective write of data including intermittent reads to the flash storage, the storage system issues a compare write request to the flash storage. The flash storage having received the compare write request reads a data before update of the written data range from the flash memory, compares the read data with the written data, and writes only the data having a different content to the flash memory.

主权项

1. A storage system comprising:
a controller having one or more processors and a cache memory, and one or more storage devices having a storage media; wherein when the processor transmits a command including an instruction of a storage range of write data from a computer connected to the storage system and the write data to the storage device; the storage device stores only a portion of the write data having a content that differs from a data before update of the write data stored in the storage device to the storage media.