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A method for reading, writing and updating an l2p table and the l2p table

An updated method and updated technology, which can be applied in the fields of instruments, computing, and electrical digital data processing, etc., can solve the problems of increasing SSD cost, large DDR space, etc.

Active Publication Date: 2021-09-10
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for reading, writing and updating the L2P table and the L2P table to solve the problem that the L2P table occupies a large DDR space and increases the cost of the SSD in the prior art

Method used

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  • A method for reading, writing and updating an l2p table and the l2p table
  • A method for reading, writing and updating an l2p table and the l2p table
  • A method for reading, writing and updating an l2p table and the l2p table

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Embodiment Construction

[0037] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...

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PUM

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Abstract

The embodiment of the present invention discloses a method for reading, writing and updating an L2P table and the L2P table. The PBA of the L2P table is marked with Nbit, and the value of N is calculated according to the disk capacity S, which is a non-32bit alignment method. Reduce the capacity of memory used by L2P, thereby reducing the cost of SSD. When reading and writing data and updating the L2P table, it is only necessary to calculate whether the corresponding PBA spans 32 bits according to the value of the LBA. Yes, it is convenient for saving and restoring L2P.

Description

technical field [0001] The invention relates to the technical field of computer storage, in particular to a method for reading, writing and updating an L2P table and the L2P table. Background technique [0002] The mapping table (L2P) of SSD (Solid State Drives) is the mapping of LBA (Logical BlockAddress. Logical address) and PBA (Physics Block Address, physical address). In the process of reading and writing, the host (host) issues LBA To the SSD, the SSD queries the L2P table to find the PBA, so as to find the corresponding flash location for read and write operations. [0003] L2P is equivalent to a one-dimensional array subscripted by LBA. Each element of the array is a PBA, and all PBAs can be addressed to any flash space of the SSD. [0004] The PBA in the existing L2P is generally marked with 32 bits, so that it is more convenient to read and write access to the 32-aligned L2P table during the operation of the SSD, but the size of the L2P table is generally 1 / 1000 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/1009
CPCG06F12/1009
Inventor 苗森
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD
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