Replace KS-LE-B with an SSD

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Here is the English translation of the provided text:
The text appears to be about comparing I/O performance between two different hard drives. The first drive has a block size of 4K and an IOPS of 258, while the second drive has a block size of 512K and an IOPS of 232. The total IOPS for both drives combined is 523. The first drive's average IOPS is 167.0 MB/s.