Magnetic disk redundant array and its controller and synchronization process
An independent disk redundancy and controller technology, applied in the direction of input/output to record carrier, etc., can solve the problems of high risk of data loss in RAID, long time consumption, affecting RAID performance, etc., to reduce the risk of data loss, The effect of reducing the probability of occurrence and reducing the synchronization time
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[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0050] FIG. 2 is a schematic flowchart of a RAID synchronization method in an embodiment of the present invention. As shown in Figure 2, the method includes:
[0051] Step 201, after a member disk is offline, record each stripe in the RAID to which the member disk has changed data.
[0052] Step 202, after the offline member disk rejoins the RAID, synchronize the data corresponding to the recorded changed stripes in the member disk.
[0053] So far, this process ends.
[0054] It can be seen that in the above process, only the data corresponding to the recorded stripes in the member disk is synchronized, instead of performing full-disk synchronization, so the synchronization time can be reduced. Since the synchronization time is reduced, the probabil...
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