🚀 go-pugleaf

In article <Cqq$=j2@cs.psu.edu>, ehrlich@cs.psu.edu (Daniel Ehrlich) writes:
> We have six identicallty configured RT 6150 Model 125s that are file serving
> for a room full of RT 6152s.  One of the six 6150s will no longer boot from
> the hard disk.  When a boot from the hard disk is attempted the two digit
> display on the front of the machine will continuously cycle through the
> following set of codes: "25 73 20 0c 00 98".  After displaying the "98" is a
> pause of about three seconds and then the sequence starts over again.
> 
> We have determined that this is some indication that the machine can not
> read the boot code off of the hard disk.  So, we replaced the hard drive,
>...
> Has anyone else seen this behaviour in a 6150 Model 125 before?  What did
> you or IBM do to correct it?  Any thoughts, hints, or magic incantations
> would be apprecited.
> 
> --
> Dan Ehrlich <ehrlich@cs.psu.edu>
> Voice: +1 814 863 1142	FAX: +1 814 865 3176
-- 

        I had a problem a while ago (1 year?) where I couldn't boot from the
hard drive, but could from the floppy.  I don't remember the codes or other
symptoms, but I cured it by powering off the machine and removing the battery
for a while.  Try it, it might help.

-------------------------------------------------------------------------
Steve Roseman
Lehigh University Computing Center
LUSGR@VAX1.CC.Lehigh.EDU
 

In article <Cqq$=j2@cs.psu.edu>, ehrlich@cs.psu.edu (Daniel Ehrlich) writes:
>[stuff deleted] 
> We have determined that this is some indication that the machine can not
> read the boot code off of the hard disk.  So, we replaced the hard drive,
>...
> Has anyone else seen this behaviour in a 6150 Model 125 before?  What did
> you or IBM do to correct it?
> [more stuff deleted]

It sounds like you may have had a hard disk failure.  You should 
attempt to re-install the VRM.  The installation program will let you know
if it can't read or write to one of your drives.


James Moody	Adv Workstation Div ; IBM Austin, 2502	  
		aesnet: moody@moody.austin.ibm.com
		vnet: MOODY at AUSVM6
outside ->	...!cs.utexas.edu!ibmchs!auschs!moody.austin.ibm.com!moody

Just wanted to let the world know that Eric Brunner (IBM Palo Alto) was able
to correctly interpret my 2 digit display for me.  The key number that was
being flashed in the display was `98', which Eric pointed out to means that
/boot was not found on /hd0a.  Turns out that /boot was there but had been
overwritten by a BIND server `boot' file as a result of ill conceived rcp I
did back in December, just about the time this problem showed up. :-)

I had looked for the meaning of the 2 digit displays in the hardware
reference manuals but completely forgot about the SMM section 1 which is
where the `important' values are discribed on page 67.  So, thanks again to
Eric for setting me straight.  I will plead guilty to not RTFM and throw
myself on the mercy of the court.
--
Dan Ehrlich <ehrlich@cs.psu.edu>
Voice: +1 814 863 1142	FAX: +1 814 865 3176

Folks, I've already spoken with Dan and the problem is resolved. Somehow a
file other than /boot was in /boot, and as far as the low-level boot loader
was concerned, /boot was "not found" (in the necessary form) on hd0a.


Eric Brunner, Consultant, IBM AWD Palo Alto	(415) 855-4486
inet: brunner@monet.berkeley.edu
uucp: uunet!ibmsupt!brunner	

In article <4013@ibmpa.UUCP> brunner@ibmsupt.UUCP () writes:
>Folks, I've already spoken with Dan and the problem is resolved. Somehow a
>file other than /boot was in /boot, and as far as the low-level boot loader
>was concerned, /boot was "not found" (in the necessary form) on hd0a.
>
The LED encoding is described on page 67 of Installing and Operating IBM/4.3
(SMM:1-67).

Eric Brunner, Consultant, IBM AWD Palo Alto	(415) 855-4486
inet: brunner@monet.berkeley.edu
uucp: uunet!ibmsupt!brunner