Tom,
It doesn't. You can only add to the last raid.
Eyal.
tkaczma@gryf.net wrote:
On Sun, 21 Nov 1999, Mike Smith wrote:
This is true. The only way to change the number of disks in the first raid group(rg0) is to destroy the volume and recreate the volume being sure to change the raidsize option as follows:
vol options vol0 raidsize 28
Well ... . When you construct a volume it is set by default to raidsize 14 unless you specify otherwise. Then you do the vol options magic and set the raidgroup to something larger. You then add disks and they should land in the right raid groups. I've experimented with this quite extensively and it DOES work. My configuration had only one raid set before I changed the option. There is a possibility that code was written to add disks only to the last raid set if the raidsize is not already met on that set - in our case it would never be met. Since you will be destroying the volume anyway, should you decide to proceed with your plan, I invite you to check whether by some chance the code is smarter and indeed allows adding disks to the first unfilled set. If I have some time I'll check this out myself. I suspect that the code may just do this.
Tom