jeff@dsndata.uucp (Jeff Minnig) (02/27/91)
Machine: 9000/375
OS: HP-UX 7.0
I have a problem with ports on our 9000/375 freezing up. We
have an expander box full of 98642A and 98544A cards. At random
times, one of the ports will simply freeze up. It is not always the
same port and at any given time, we may have two or three of them
frozen.
The processes on the port cannot be killed, so I suspect that
they are in I/O wait.
Does anyone have software that will issue a reset command to
these cards?
--
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I said it, not the people I work for.
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Jeff Minnig | (402) 476-8278
Design Data |
1033 'O' St. Suite 324 | {hpfcla,sparky,unocss}!dsndata!jeff
Lincoln NE 68508 |
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----------------------------------------------------------------------sears@cello.hpl.hp.com (Bart Sears) (03/07/91)
I am not sure what you mean by a box full of 98642A and 98544A cards. A 98544A card is a 1024x968 BW display card. However, I do have a suggestion for your problem with the ports on the 98642A card (this is a 4 port serial mux card). It turns out that one of the pins on the three "non-modem" ports is a test pin which should not be attached to anything. If it is hooked to something, that port will go into "test" mode. If this happens during boot, the card will fail selftest. I have also seen cables where the test pin is hooked to one of the wires in the cable but not attached to the device on the other end. This wire becomes a nice antenna which will occasionally throw the port into test mode which will make it seem to "freeze up". Since the connectors on the back of the board are RJ-(13?? (ie telephone)) connectors, you either want to cut that pin out of the connector or use a short cable to an adapter box where you "free" this line). I also seem to recall that there may have been a service notice on this card. You should check with your HP support person. Bart Sears sears@hplabs.hpl.hp.com
bobk@hpcuhc.cup.hp.com (Bob Kentwortz) (03/09/91)
I have seen similar symptoms on a different system. That problem was due to a long cable connected to the port, but no peripheral attatched to the other end. In effect, it acted like an antenna. The noise induced on the line caused repetitive interrupts to the card, which caused to card f/w to stay in a loop, appearing to be hung. Bob Kentwortz (My opinions do not represent HP's.)