SSD internal data storage management method, device, storage medium and SSD equipment
A technology for internal data and storage management, applied in the direction of input/output to record carriers, etc., can solve the problems of increasing firmware complexity and code overhead, and achieve the effects of saving SPIFlash space, reducing hardware costs, and improving access performance
Active Publication Date: 2022-05-13
DERA CO LTD
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[0004] In the prior art, there are the following commonly used management methods for SSD internal data. The first method is to continuously store SSD logs in a fixed physical location and return the stored location information to the visitor. The defects of this management It is the firmware FW of the SSD that needs to maintain additional logic codes for storing these information, which increases the complexity of the firmware and the overhead of the code, and the additional information returned needs to consider how to save the information when the power is turned off.
The other is to store the log categories in different media, that is, the user data is stored on the NAND Flash of the SSD disk, and the internal data generated inside the disk uses another storage particle such as SPI Flash to store the internal data in the SPI Flash is naturally isolated from user data, but this will inevitably bring additional hardware cost overhead
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[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0038] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more o...
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The present invention relates to the technical field of data storage, and provides a storage management method, device, storage medium, and SSD device for SSD internal data. The method includes: when receiving a write request for SSD internal data, writing SSD internal data to a disk The internal physical address extension area; the physical address extension area is located in the redundant address space in NAND flash memory other than the user-accessible physical address space, and the target logical address is located in the logical address extension area, which is the same as the physical address extension area. The logical address area of the mapping relationship; the internal mapping table is configured in the flash translation layer to save the mapping relationship between the target logical address and the physical address of the internal data written into the SSD. The invention reduces hardware cost by simultaneously storing user data and SSD internal data through NAND flash memory, and improves user data access performance when SSD firmware processes SSD internal data.
Description
technical field [0001] The present invention relates to the technical field of data storage, and in particular to a storage management method, device, storage medium and SSD device for internal data of an SSD. Background technique [0002] In the LBA (Logical Block Addressing) mode, a data area on the SSD hard disk is uniquely determined by the head, cylinder (that is, the track) and the sector where it is located. The early system directly used the head cylinder and sector to address the hard disk (this is called CHS addressing), which needs to store three parameters of each area separately, called 3D parameters, and read the three parameters separately when using them. parameters, and then sent to the disk controller for execution. Since the system uses 8b to store the head address, 10b to store the cylinder address, and 6b to store the sector address, and a sector has a total of 512B, so the maximum capacity of a hard disk addressed by CHS is 256 * 1024 * 63 * 512B = 80...
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IPC IPC(8): G06F3/06
Inventor 孟欣
Owner DERA CO LTD