mknod /dev/tty0p1

[Tom Dawson]

Hi,

I'm trying to connect an APC Smart-UPS to a RP3410. I have the APC provided cable ( p/n 940-0024C ) connected to the "UPS" port of the "W" cable on the RP3410.

My understanding is that the "UPS" port uses device file /dev/tty0p1. But this file doesn't exist on my system. I do have a tty0p0:

crw--w--w- 1 bin bin 1 0x000000 Jan 25 2006 tty0p0

So I can surmise that the major number for tty0p1 should be "1".

Can someone give me some help on what the mknod command should be for creating /dev/tty0p1?

Thanks,
Tom

[Torsten. · Accepted solution]

"My understanding is that the "UPS" port uses device file /dev/tty0p1."

Why?



I'm pretty sure it is tty0p0, hw-path 0/7/1/0.

[A. Clay Stephenson]

I don't have a 34xx handy but Here is my best guess:

mknod /dev/tty0p1 c 1 0x000100.

Man 7 termio

[Tom Dawson]

Torsten,

Because of a thread I found here on the forum from March of 2001 that said:

/dev/tty0p0 - Console
/dev/tty0p1 - UPS
/dev/tty0p2 - Remote/Modem

That made sense to me with the Consle being on port 0.

Is that not the case?

Thanks,
Tom

[Jaime Bolanos Rojas.]

Tom,

Torsten is right about the device and hardware path.
Take a look at this HP document to confirm that information

KBRC00016167

to fix your issue, follow Clay's solution but with the right variables.

Regards,

Jaime.

[Tom Dawson]

Torsten,

Thanks, you were correct. I've installed the PowerChute Software and it's talking to the UPS.

Jaime,

Thanks for confirming.

Clay,

Since Torten was correct, I didn't have to actually build the device file. Thanks anyway!

Tom

[Torsten.]

Tom,

the thread you mentioned is about a rp54x0 (aka L-Class).
This is really different. The systems have in common that they can run HP-UX, that's it.

The HW layout (and the HW pathes also) depending on the system in every case.

Newer systems (cell-based) doesn't have an UPS port at all, because it makes no sense to connect only one partition to the ups. They rely on network connected UPS.

Nice to see this problem solved - have fun!