Replace a file server:

Suppose one of the disc arrays on group 0 fails. One quick fix is to replace it with the corresponding fileserver from group 1 (actually you could use any of the file servers in group1). The sequence and things to worry about are:

You probably won't be able to use group 1 so commensal observing with the mocks is not allowed.
login as root to pdevs1

cd /usr/local/pdev/etc
edit boxes.conf.templ.

suppose we are to replace fileserver pdevs6 with pdevs13 of group 1
before:

b5s0g0 pdev-112 5 0 0 gxa pdevs6.pdev.naic.edu
b5s1g0 pdev-112 5 1 1 gxa pdevs6.pdev.naic.edu
b5s0g1 pdev-117 5 0 0 gxa pdevs13.pdev.naic.edu
b5s1g1 pdev-117 5 1 1 gxa pdevs13.pdev.naic.edu

after:

b5s0g0 pdev-112 5 0 0 gxa pdevs13.pdev.naic.edu
b5s1g0 pdev-112 5 1 1 gxa pdevs13.pdev.naic.edu
b5s0g1 pdev-117 5 0 0 gxa pdevs6.pdev.naic.edu
b5s1g1 pdev-117 5 1 1 gxa pdevs6.pdev.naic.edu

switch the Ethernet cables between the two spectrometer boxes.

Normally group 0 spectrometer boxes go to 1 switch and group 1 spectrometer boxes go to another switch
Each of these switches then have the corresponding fileservers plugged into them
There is also a crossover cable that connects the 2 switches, so switching the Ethernet cables between the two spectrometer boxes is not required. But it is always better for high data rate to have the spectrometer box and file server plugged into the same switch,.
before unplugging the Ethernet cables at the spectrometer boxes, label them so you will remember that when the "temporary" fix is no longer required (say you fixed the disc array), then you'll remember to put the cable back in the correct order.

090907: exchanging/replacing pdev spectrometer

edit the files:

/usr/local/pdev/etc/boxes.conf.templ. You need to swap the ip addresses for the boxes you are switching.

Eg.. suppose b1sxg0 failed and you want to switch it with b1sxg1.

before:

b1s0g0 pdev-103 1 0 0 gxa pdevs2
b1s1g0 pdev-103 1 1 1 gxa pdevs2
b1s0g1 pdev-108 1 0 0 gxa pdevs9
b1s1g1 pdev-108 1 1 1 gxa pdevs9

After:

b1s0g0 pdev-108 1 0 0 gxa pdevs2
b1s1g0 pdev-108 1 1 1 gxa pdevs2
b1s0g1 pdev-103 1 0 0 gxa pdevs9
b1s1g1 pdev-103 1 1 1 gxa pdevs9

/usr/local/pdev/etc/cal.conf

You should switch the entries of b1sxg0 with b1sxg1 so that the correct a/d offsets are used. if you have time you can just rerun the a/d cal.conf routine

HardWare mods:

Move the serial cables for the attenuator settings from pdev-103 to pdev-108
Ethernet cable from pdevBox to switch.

As long as you are only switching 1 set of boxes you don't have to mess with the Ethernet cables since the switch for group 0 is connected to the switch for group 1 via a 1 gbit link.
If you switch more that 1 set, then you should probably also switch the Ethernet cables that plug into each spectrometer box. For fast datataking more than one spectrometer box would have to share the single 1 gbit link between group0,group1 switches to get to their respective spectrometers.

Permanent replacement:

Offline:

/share/megs/phil/svn/pdev/pdev/pnetbld/boxes.conf.templ

Make the same changes you did for the above online file.
svn commit boxes.conf.templ .. update in reposistory.. add message when requested..

Online:

edit the file /usr/local/pdev/etc/boxes.conf.templ to put the ip address for the new box in (see above)
Make sure the bbm serial cables are on the group 0 cpu. (eg b2sXg0) spectrometer box.
Remeasure the a/d cal values.
Warning:You need to run pnet on the new box as root once before letting cima take over.

When the routine ssh's into the new box, ssh gives a warning messages and asks whether it is ok to connect to this machine... This mesasge screws up cima so you need to get it out of the way before running cima.
!! This has to be done as root since cima runs pnetctl as root. Each user will get their own ssh message requesting if it is ok
As root on pdevs1

cd /dump/pdev/files
pnet --conf=pnetAll.conf --sigstat --extclk

If you get an ssh message just enter yes.
After it runs a few loops, just ctrl-c
You can then run cima.

090907: Verifying the synthesizer levels.

clock: 172.032Mhz 12dbm (top)

lo 0 : 175Mhz 12dbm

lo 1 : 325Mhz 12dbm

rf on light is on (lower right of each synth).

The rf on light or frequency changes could occur if their power is cycled. This shouldn't happen as long as the ups's are working

090907: updating the a/d offsets cal.conf file

On a vxWorks window enter: if2noise .. this selects the if2 noise source.

slogin to pdevs1 as phil

cd /dump/pdev/files

caldoit

hit return when it prompts you to be sure that if2noise has been entered. It will then recreate the file /usr/local/pdev/etc/cal.conf.

Make a copy of the new file for historical purposes:

from /dump/pdev/files:

cp /usr/local/pdev/etc/cal.conf rmsyymmdd.out

<- page up

Pdev maintenance procedures

Replace a file server:

090907: exchanging/replacing pdev spectrometer

090907: Making sure all boxes select extclk

090907: Verifying the synthesizer levels.

090907: updating the a/d offsets cal.conf file