adding second power supply : p550

[billy1]

Hi,
I want to add a second power supply without having to bring the machine down. I connected the second power supply and after a couple of minutes took it out again and checked the root crontab. I was expecting the machine would have detected the power supply had been removed and placed an entry in the root crontab to check the power supply every 12 hours. This was how I would determine the power supply had been connected correctly as there are no LED's etc.
However on checking the root crontab there was no entry. Any idears ?

 

[mrn]

Plug in the PSU then type

/usr/lpp/diagnostics/bin/uesensor -l


Should show 2 * PSU

Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[billy1]

Doesn't work :
/usr/lpp/diagnostics/bin/uesensor -l
This function is not supported on this system.

 

[p5wizard]

Try

lscfg -vp|grep -p PS:



HTH,

p5wizard

 

[billy1]

The lscfg command worked but not sure what exactly I'm looking for to tell me the second power supply is connect successfully ....?

 

[mrn]

What version of AIX are you on?

Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[billy1]

5.2 ML4

Mike,
I am correct in assuming this is giving me information on the power supply I have connected and then when a second is connected I'll find 2 such pieces of information ?

 

[p5wizard]

I'd count the number of times it shows a paragraph with the PS: header. And also look at the physical location codes.


HTH,

p5wizard

 

[mrn]

smit diag
current shell diagnostics
Enter
Task Selection
Display system environmental sensors

Does the same as uesensor -l

If it still doesn't work try installing bos.diag.rte/utils



Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[mrn]

Sorry didn't see the question addressed to me.

It should show things like temp/fan speed & number of psu's and yes you should see extra info after connecting the second PSU

Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[RMGBELGIUM]

Normally , if your power supply works when plugged in , all is OK , AIX will see it at boottime when you reboot the next time.I've had the same issue, only one PSU was installed, added another one, nothing to be seen in config, and it was until reboot that it showed up.(this was a P520 )

rgds,

R.

 

[mrn]

I wonder if a cfgmgr would do the trick? Wouldn't advise it on a HACMP system though.

Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[RMGBELGIUM]

cfgmgr doesn't do the trick, been there,tried that
Don't see a reason though why it can't be done on a HACMP system, as your system doen't become unavailable at any given time

rgds,

R.

 

[billy1]

Last night I left the 2nd power supply connected in for an hour just in case there was a time factor that it wouldn't be picked up until after a certain time however nothing happened. I then rebooted the server and ran the test against the crontab but this didn't show anything up either.
I can see that there's two power units when I run:
lscfg -vp|grep -p PS
And I know the power cable is live. Just testing that the machine is picking it up is the problem as the crontab test as described above isn't showing anything...
I think tonight I'll shutdown the server, plug in the 2nd power unit, plug out the first and see if it powers up ? It may be a problem with the internal power unit ? Its not HACMP by the way...

 

[mrn]

R.

On certain early versions of HACMP cfgmgr reconfigured the network adaptors.

Take a look at

/etc/rc.powerfail & /usr/lib/boot/bin/rc.powerfail_chrp

also see

man machstat



Mike

"A foolproof method for sculpting an elephant: first, get a huge block of marble, then you chip away everything that doesn't look like an elephant."

http://www.airport-parking-site.co.uk/

 

[DukeSSD]

from memory.....
you can hot add the second psu.
the system will not show it has been added until you shut down and then boot up again.
however, if a power supply fails before the reboot, the system will keep running on the remaining psu, which ever psu failed.
as for running cfgmgr on a hacmp system, not advised, it can cause all sorts of problems with networks and shared disks.

 

[billy1]

Guys,
Just to give you an update on this: Last night I powered off the machine completely and removed the first power supply leaving the new second power supply in, tried to power the machine back up but nothing happened. Reconnected the first and it powered up as normal. Does this mean there's a problem with the internal power unit ? However when I run "lscfg -vp|grep -p PS" it picks up two power supplies......

P.S. The second power supply is live, I used it to power on a monitor.