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Now let’s check the controller out at sequential writing. The dependence of the controller’s write speed on the data block size is shown in the table:

Here are diagrams for the two groups of arrays:

This group of arrays performs even better at sequential writing than at sequential reading. The speeds are in fact the same, and the arrays reach their maximum speeds on exactly the same data blocks.

The speed of the RAID1 and RAID10 is nearly the same as the speed of the single drive and the two-disk RAID0, respectively, when there are no read operations to be performed. The graphs of the RAID5 and RAID6 arrays look somewhat worse, but these arrays cannot but behave like that in 100% write modes!

 
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