Address mapping data backup method and device
A data backup and address mapping technology, which is applied in the storage field, can solve the problem of large storage space occupied by address mapping data backup, and achieve the effect of ensuring security and reducing occupation
Active Publication Date: 2021-04-27
NEW H3C TECH CO LTD
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[0003] In view of this, in order to solve the problem that the existing address mapping data backup occupies a large storage space, the present invention proposes an address mapping data backup method and device to reduce the storage space occupied by address mapping data backup
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[0040] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0041] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...
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Embodiments of the present invention provide an address mapping data backup method and device. A storage device divides user data into several data segments according to sector size, and assigns a corresponding logical address to each data segment. The storage device writes the data segment and its corresponding logical address into the target physical block; records the mapping relationship between the logical address corresponding to the data segment and the physical address of the sector storing the data segment, and adds the mapping relationship to the corresponding first physical address of the target physical block. In an address mapping table; when detecting that the target physical block is full, store a first address mapping table in other physical blocks; if reading the first address mapping table fails, based on each logical address stored in the target physical block, and the physical addresses of the sectors included in the target physical block to generate a second address mapping table, where the mapping relationship recorded in the second address mapping table is the same as that recorded in the first address mapping table. Therefore, the security of the address mapping data is ensured, and the occupation of storage space is reduced.
Description
technical field [0001] The invention relates to the field of storage technology, in particular to an address mapping data backup method and device. Background technique [0002] The address mapping data is used to record the mapping relationship between logical addresses and physical addresses. As key data of a storage device, address mapping data is usually stored in a double backup manner. That is, two copies of the same address mapping data are stored. When the reading of the first address mapping data fails, the second address mapping data is read to ensure the security of the address mapping data. However, this double backup method occupies a large storage space. Contents of the invention [0003] In view of this, the present invention proposes an address mapping data backup method and device for solving the problem that existing address mapping data backup occupies a large storage space, so as to reduce the storage space occupied by address mapping data backup. ...
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IPC IPC(8): G06F11/14G06F12/1009
CPCG06F11/1448G06F12/1009
Inventor 唐侃毅
Owner NEW H3C TECH CO LTD