Some LUNs invisible to some clients but not others?
Has anybody here seen that some LUNs are visible to some Mac Pro clients, but not others on the same Qlogic 5600 switch? There is no zoning enabled.
We have checked the port properties and tried switching between different physical ports, but whatever I do, a group of LUNs, 8 ActiveStorage LUNs (two Xsan volumes) are not visible to a new Mac Pro 10.7.5 client. The new client can see other storage LUNs available on the same FC fabric. Already existing 10.6.8 and 10.7.5 clients on the same 5600 switch can see the 8 ActiveStorage LUNs that the new 10.7.5 client can't see. We have tried reinstalling the client to 10.6.8, but that doesn't help.
I found these Qlogic kbase articles, but this issue does not seem like a random one.
Initiators are Randomly Losing LUNs After Reboot
Windows XP and MAC OSx Servers Do Not See LUNs
Apple Systems Losing Access To LUNs After Activating a Zoning Change
We have a pretty big FC fabric, and have been running without zoning for quite a while. Have we reached some kind of limit maybe? This would still not explain why it's the same set of 8 LUNs that are invisible/unreachable to this new client.
Are there any limits as to how many targets and initiators that can see each other in the same FC fabric? How many targets and initators can you run in a Qlogic FC fabric without zoning?