Fiber: Only the first 6 clients can see the storage?!
We have one SANBox 5602 in our facility, serving Mac Pro workstations with Atto Celerity FC-41 and 42 HBAs. It used to serve our Avid Unity with no issues. Last week I got rid of the Unity and upgraded all our systems to 10.8.4.
The problem is an invisible "quota" where only the first 6 systems to be powered on get to see the storage. Any consecutive machines see nothing on the fabric, yet ALL the devices (switch and HBAs) on all ports see a good link, and the switch reports the clients are active and logged in to the fabric.
I already went through the entire fiber infrastructure - ensuring all HBAs have the latest firmware and drivers, ditto for the switch, and matching SFP's and fiber runs. The switch is fully licensed.
I tried a switch factory reset; set a fixed port type and speed (F for the hosts, the storage only takes FL); ensured only hosts have I/O Streamguard; tried putting everyone in 1 zone, and even disabling zoning altogether; I even tried Device Scan on targets.
Nothing made any difference. The only workaround I know is to power-cycle everything which just restarts the "quota" again.
I should disclose that I'm not running XSAN but metaSAN... but this is independent of any SAN software; if the underlying fabric doesn't work then nothing works (besides, I'm still considering XSAN :-) ).
Qlogic inspected the switch service dumps and couldn't find a single thing wrong with it. I'm at my wit's end, and know most everyone here is experienced with similar fiber setups. Do you have any ideas??