General Questions: Writing to shares during rebuild bad idea?


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You can use the array while it's doing a rebuild, just as you can use the array during parity checks.  HOWEVER, consider what's happening during those operations, and you'll realize that any additional I/O will cause significant disk thrashing on those disks involved in the other I/O.  So it will very significantly slow down the rebuild/parity check, and will also be slower at the other operation(s) as well.

 

Bottom line:  Except for perhaps "showing off" the ability to do it, I NEVER do anything with the array while running parity checks or during disk rebuilds.    I HAVE, on occasion, streamed a couple of movies from a "non-existent" disk (i.e. one that's missing from the array) just to show off the ability to do it.

 

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