You've just described how to avoid the issue. That is, get a better case.
But I can write I've never seen the above happen. Usually there is some other factor at play.
Bob
I want to setup a SAN server using a mix of different speed drives and have multiple arrays. So I would have a raid 1 of 2 7200RPM drives and a raid 1 of 2 10K RPM drives. I heard that having a mix of different drive speeds in the same physical box can break arrays because the vibration caused by the different drive speeds screw up the read/write heads in the drives. Is that true? I also heard that if it is true that you can do that as long as the chassis specifically supports the use of different drive speeds in it.

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