Adapters can be broken because of the power-cycling of the host system. In most cases if an adapter is defective it shows once you power-cycle a system. This is a common effect.

Only a few weeks ago we had a power failure in one of our datacenters (lightning struck and UPS failed come up). When we restarted the complete environment an hour later we had several adapters (and in one case even a sysplanar) failing completely or in parts.

In the end we replaced the sysplanar, two power supplies, 2 FC cards and 1 10G-adapter, distributed over ~20 managed systems (mostly 780s and 740s)

Even if they do soft zoning (based on WWNs) there is a chance that you changed to another part of the fabric when you moved the system. In many cases there are several switches ("clusters") and a zone defined on one doesn't necessarily mean it is defined on any other.

In any case i suggest you also check all the connecting cables. There is always the chance of a FC cable broken.

I hope this helps.

bakunin