Re: RAID arrays with different size disk units?

At 06:14 PM 12/16/98 EST, you wrote:
>Are there any circumstances where disk units of a different size can be added
>to an existing RAID array?  The Backup and Recovery manual states that you
>need 4 disk units of the same size to start RAID protection, and that
>additional units can be added later.  But it is unclear whether these need to
>be the same size units.
>
>I currently have one RAID array that isn't full; it has four 2gb drives (raw
>size).  Can I add 4gb (or larger) disk units into this array?  We have added
>disk units into an existing array in the past, but they have always been of
>the same size.

If you add DASD of different size, it will form an additional parity set.
(ie:  you will have to pay the penalty of another parity disk).

If I haven't explained this sufficiently, call me.

Al




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