Whenever you replace place a larger disk into a RAID-group, it automatically becomes the PARITY disk. If you double-parity, I suspect can add one disk. You will not see any space gains more than the smaller size disks. In fact you will see not see any increase after adding two larger disks as they will become the parity and double-parity disks. Only when you add a third (in your example) will you see an increase in full capacity of the disk.

Make sense?

On 1/10/07, Willeke, Jochen Jochen.Willeke@wincor-nixdorf.com wrote:

Hi toasters,

currently i am testing with my simulator and searching for a way to do the following:

• have a raidgroup with 5 disks
• the two parity-disks plus one data-disk are 100 MB (net)
• two other data-disks are 35 MB (net)

I want to replace the 35MB-disks with bigger ones, but everything i tried left the "new" disk in the raidgroup with a used size of 35MB.

Is there a way to replace a small disk with a bigger one and use the complete size of the disk without destroying the whole raidgroup?

Regards and thanks in advance

Jochen