No LUNs in Xsan admin

I'm using Xsan 1.1 on OSX 10.4.7 and I added an new Xserve RAID into the mix. But the trouble is that the LUNs are not showing up in Xsan Admin (v.1.3).
`cvlabel -l` shows the two LUNs, labeled "unknown". so does `diskutil list`.
All Xserve RAIDs have the same firmware, no LUN masking is on, and all the ports on the fibre switches are in the same zone.
Disk Utility.app can see the LUNs and will let me make a software RAID combo of them , but that's what I want. What I would like is to expand two of my data-only storage pools, if they'd show up in Xsan admin.
I've looked the manuals,man pages, discussions and so forth.
Any ideas?
Thx.

I reveiwed the following documentation for adding LUNs to storage pools:
http://docs.info.apple.com/article.html?artnum=303571
http://docs.info.apple.com/article.html?artnum=303570
http://docs.info.apple.com/article.html?artnum=301911
And it worked. Sort of.
I shutdown all the clients, except 2 or 3 (mdc, md backup and my admin Mac). Then I unmounted the volume from last remaining clients, and I stopped the volume. Then I proceeded to backup the cfg, check the volume, and add the luns to an existing storage pool. All went well, until it failed to update the volume with the new cfg. I reverted to the old cfg and added the LUNs to a new storage pool. That worked.
Thanks for everyone's thoughts on this one. I took more time to do it this time, then I did a month of so ago. Careful planning and backups (cfg and data) are helpful to peace of mind.
-x

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Some clients do not appear at all in XSAN Admin, yet they are working happily with mounted, fully functioning volumes. All well and good, but we can't mount or unmount volumes.
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Within XSAN Admin, some clients appear in the Setup/Computers list with a green blob, yet they do not appear at volume level. So whilst at some level the system is aware of the client, again they cannot mount or unmount volumes.
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Message was edited by: VTmaint
Oh, and rebooting an invisible or partially visible client doesn't make any difference either!

I was just in contact with Apple support about this issue. Turns out it's a bug. The workaround is log in as an admin on the client system and issue this command from Terminal:
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<password>
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1. Public IP ranges between 10.160.16.x through to 10.160.20.254
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