According to Eric Kolotyluk <eric@sfu.ca>:
> I've been having a lot of trouble getting my (old) Ultra 5 to boot.
>
> I've connected a terminal emulator to serial port a on my Sun and run
> the Power On Self Test (POST) several times and it never fails, even
> with dial-level max.
>
> The trouble seems to happen after the reset or power-on
>
> Clearing I/D TLBs Done
> Probing Memory Done
> MEM BASE = 0000.0000.1000.0000
> MEM SIZE = 0000.0000.1000.0000
> 11-Column Mode Enabled
> MMUs ON
> Copy Done
> PC = 0000.01ff.f000.201c
> PC = 0000.0000.0000.2060
> Decompressing into Memory Done
> Size = 0000.0000.0006.e770
> ttya initialized
> Reset Control: BXIR:0 BPOR:0 SXIR:0 SPOR:1 POR:0
> UltraSPARC-IIi 2-2 module
> Probing Memory Bank #0 0 + 0 : 0 Megabytes
> Probing Memory Bank #2 128 + 128 : 256 Megabytes

Hmm ... nothing in bank 0, and two simms in bank 2? What if you
move them to the other sockets? The system may be expecting SIMMs in
bank 0.

> Probing UPA Slot at 1e,0 Nothing There
> Probing /pci@1f,0/pci@1,1 at Device 1 pci108e,1000 network
> Probing /pci@1f,0/pci@1,1 at Device 2 SUNW,m64B
> Probing /pci@1f,0/pci@1,1 at Device 3 ide disk cdrom
> Probing /pci@1f,0/pci@1 at Device 1 Nothing there
> Probing /pci@1f,0/pci@1 at Device 2 pci
> Probing /pci@1f,0/pci@1/pci@2 at Device 0 Data Access Error
>
> whenever I do a reset I get
> Data Access Error
>
> If I try to boot I get
> ok boot disk
> Boot device: /pci@1f,0/pci@1,1/ide@3/disk@0,0 File and args:
> Memory Address not Aligned
> ok boot disk
> Fast Data Access MMU Miss
>
> At this point whenever I try to boot from disk I get Fast Data Access
> MMU Miss, until I reset and start all over again.

Perhaps the location of the SIMMs? (Or perhaps not.)

> Does this indicate a problem with the disk? The disk isn't that old, and
> when my Ultra 5 does boot the OS seems to run fine.

So -- it does boot sometimes?

If there is something in bank 0, and it has an intermittent
connection, this could explain why it sometimes boots and sometimes does
not. (Though it would have to be a unusual intermittent to avoid
leaving information in the diagnostics which you quoted above.

BTW What is in the PCI slots in the machine? You seem to have an error
associated with one or more of the slots.

> Any help or advice would be appreciated.

Just guesses above.

BTW The Ultra 5 machines are now so inexpensive, that getting a
second machine to swap parts with might be the most
cost-effective diagnostic tool.

Good Luck,
DoN.

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