RAID array rebuilding method and device
A technology of array and strip, applied in the field of RAID array reconstruction, can solve the problem of video cannot be played back, and achieve the effect of good playback
Active Publication Date: 2015-08-19
ZHEJIANG UNIVIEW TECH CO LTD
View PDF5 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In a video data storage environment, this processing method may cause a large number of videos on the array to be unplayable
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] To solve the problems mentioned in the background art, the present invention provides a new array reconstruction solution. In the process of rebuilding the redundancy check array, this scheme achieves the availability of the array by sacrificing the least data integrity in the case of read errors, so that the video surveillance data stored on the array disk can be well played back by the user. The following is a detailed description through specific embodiments.
[0012] Please refer figure 1 , The array reconstruction method of this embodiment includes the following steps:
[0013] S11. In the process of rebuilding the redundancy check array, if the read command for each disk block is issued and the read failure is returned, then for the failed block, several slices are reissued to read the data of the block. Sub-commands, these sub-commands are set not to be combined with the transparent transmission flag at the block level;
[0014] S12. After the operation results of the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides an RAID array rebuilding method. The RAID array rebuilding method includes: in the process of redundant checking array rebuilding, if a reading error is returned after a reading order aiming at each disk strip block is issued, reissuing a plurality of suborders for reading data of the strip block in a fragmented manner aiming at the strip block in a reading failure, and disposing unvarnished transmission marks indicating that merging is not performed in a block layer on the suborders; after all operation results of the suborders are returned, considering data of areas corresponding to the suborders failed in reading to be 0, and enabling the data as 0 and data of areas corresponding to the suborders succeeded in reading to jointly form combined data of reading failure strip blocks; according to the combined data of the reading failure strip blocks and data of reading success strip blocks, acquiring checking data, and issuing a writing order to write the checking data into corresponding strip blocks of a rebuilt disk. By the RAID array rebuilding method, in the process of array rebuilding, under the circumstance of reading errors, array usability can be realized by sacrificing minimum data integrity.
Description
Technical field [0001] The present invention relates to the field of storage technology, in particular to a method and device for RAID array reconstruction. Background technique [0002] During the reconstruction process of the existing RAID5 array, if a stripe reconstruction command encounters a read error when reading a data disk, the stripe corresponding to the reconstructed disk will also be marked as having a read error because the data is invalid. After that, continue to rebuild the next stripe. After all stripes are rebuilt, the rebuilt disk is added to the array to become a data disk. In this way, the redundancy of most stripes in the RAID5 array can be restored as soon as possible. [0003] For the RAID5 array that has been rebuilt after this happens, the original rebuilt disk identifies the wrong block. In fact, there is no problem with reading and writing on the disk medium itself, but because the data is invalid, it prevents the read data from causing consistency probl...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 王丽红郭永强许勇
Owner ZHEJIANG UNIVIEW TECH CO LTD