I am currently installing a cluster with SL6.3, and my comments on the
questions in line below, with my 2 cents

>> #0 - Yes, xcatconfig is trying to restart the nfs service for the first
>> installing to export the /install directory. But the problem is that could
>> you run 'service nfs restart' successfully without touch of 'rpcbind'
>> service? If no, is it an issue of SL6?
>
> I don't think any RHEL based systems do this kind of dependency checking
> (although later Fedora's do) - certainly RHEL5 and before will not start
> portmapper for you.

I've not had this issue, as I just do a standard base install, and do
a "yum install xCAT" maybe it was somehow totally missed

>> #1 - The rcons worked in pxe phase was because the console was control by
>> firmware. Could you check the parameter for the console was set correctly.
>> And what's it help if not add the console parameter to the kernel parameter?
>
> Using xnba I sometimes get the console through rcons - sometimes I don't.

I use XNBA, have done since it's inception. But the "console=ttyXXX"
is required for the purpose of viewing the console of the machine via
rcons/wcons. Without this you have no console. Have you tried the
recommended settings on you machine. I still have a test cluster with
x3455's, and I had no problems with that, except that the serialspeed
needed to be 19200 instead of 115200

>> #4 - Stopping loop install does NOT depend on any postscript.
>
> How does xcat know to change the boot status from "install" to "boot" after
> the install is completed?

The postscript, i.e.

#INCLUDE:#ENV:XCATROOT#/share/xcat/install/scripts/post.rh#

is required for the machine to communicate with the MN so that it
knows about the install finishing, and change the relevant xnba/pxe
settings for it to boot back again. This also grabs the relevant
postscripts defined in postscripts.postscripts. but if you don't have
any postscripts, then you should be ok, but the main one you would
want to keep is the remoteshell; so that you can log into the machine
without any passwords, and able to do you own post install stuff.

The pre script is required, so that you can monitor the state of the
install while it is installing, via nodestat.

regards,
Arif

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