Burned, no less, for yet again failing to adhere to Ronald Reagan's sage advice:
“Trust, but verify.”
(No, I'm not a Republican, nor did I much care for Reagan otherwise.)
Next time, when the SAN engineer says, “I had a problem with one of those tape drive WWPNs logging into the fabric,” and I send someone to go look, and they notice that the cable's plugged into the wrong port and switch it, and then the SAN engineer says, “Okay, everthing's fine.” … NEXT TIME I will go verify, before the evening of the change control, that the frickin' HBAs can actually see the tape drives, let alone anything at all, given that, you know, exactly one of them apparently doesn't exist on the fucking SAN fabric.
Yeah, gibberish. Bite me.
Update: So, turns out that this HBA has been bad, as in hardware-broken, for about a year. We asked the people who own the system to please have it replaced months ago, and I was told that they had. They had not. Crisis, however, was averted, with a smile and nod as distraction while, under the table, the (other, on-call) SAN engineer did something for me that he wasn't supposed to do, so that I'll do something later that I'm not really supposed to do, and the change control (plus, these people's backups) can go ahead as planned. The important part is that nobody needs to know, because there's no harm and, thus, no foul. This means I still have rather a lot of work left to do tonight (yes, it is Saturday here), but I was already not doing anything with my Saturday night because of this, so this is actually a good thing.
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