PROCEDURES FOR THE CHANGE BETWEEN HERCOMIC SSD AND OPEN CHANNEL SSD WITHOUT DATA SOLUTION

摘要

Devices and techniques for switching a fixed body device (SSD) between a conventional SSD mode and an open channel SSD mode (OCSSD mode) shall be provided. From one point of view, a command set for communicating different data types is defined by a Flash Translation Layer (FTL) between the host and the SSD. The commands can include different predetermined bits that carry different types of FTL data in a standardised format. The commands can be transmitted using reserved data words in an interface specification,connecting the host to the SSD. The commands can include commands to transfer a logical-physical address table, a validity bitmap and a wear table. A switching mode command can include a bit indicating whether the mode should be switched from conventional SSD to OCSSD or from OCSSD to conventional SSD.