Cannot see an array on an Apple XSAN in Disk Utility

I have an XSAN connected to an Apple server. The XSAN has two fibre channels connected. I have created two arrays, one on each side of the XSAN. I can only see one (the left) in Disk Utility. I cannot see the other array.

Appreciate some guidance.
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Just saw in release notes to last night's OS X 10.6.3 update that they addressed something similar to this in the new kernel.  What hardware, exactly and what O/S are you running.  

If you swap FC connections, does the array appear?   Did you verify good cables, SFPs, green lights? You have 2 FC ports so have a lot of diagnostic capability. Need to figure if it is a hardware problem, a LUN mapping/masking issue, or XSAN configuration problem.

If you have a non-Apple computer with a HBA, see if it can see the LUNs?
OxygenITSolutionsAuthor Commented:
The only amber light is that one network cable is not plugged into one side of the SAN, the other network is fine and we use this for management.

All the fibre channel connections look fine.
To debug, you need to eliminate what is known working or known bad, then, little by little the answer will become obvious

1. Swap cables, & SFPs -> eliminates cabling
2. If you have a switch, see if switch sees both the disk target and your HBA ports.
3. If you have a switch, make sure zoning is not the problem (put everything in same zone)
4. To eliminate driver issues, just plug a HBA into a  windows or unix PC, and see if it detects the virtual targets. no need to mount, or even leave the BIOS of the PC, just see if it detects both ports.  If it does, then software settings is the root cause.

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OxygenITSolutionsAuthor Commented:
Rebooting the Apple xServe resolved this issue and the array appeared.

Your troubleshooting did identify an unplugged network cable and although this wasn't the cause, it did help. Thanks for your time.
Thnx - Sometimes following procedures "by the book" pays off.  Glad you got it working.
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