[rescue] CD ISO, SunOS 4.1.4 & Qemu SS-5

Richard ejb at trick-1.net
Thu Nov 19 04:54:41 CST 2020

Hey folks

FWIW back in the day (miss those days) when I put approx 100+ sun4 machines
out for a client (mix of IPX/IPC/SS5/SS10/SS20)  in the wild with various disk
& tape configs I recall always having to check the scsi IDbs. it seemed like
every install required checking and making sure.

And yes sunos4 was fixed IDs unless you recompiled
Boot ID3
Tape ID4 (?I think it was or was it 5)

Hope that helps



Sent from my iPhone

> On 19 Nov 2020, at 19:58, Peter Stokes <peter at ashlyn.co.uk> wrote:
> o;?Hi
> Just my two penny worth, but suspect the ID3 was due to the move from
> to internal drives. Up to that point all drives were external and normally
> were set to 0 for the boot drive. When they introduced internal drives
> they thought leave the externals as is to allow adding on to the newer
> systems?
> I know you could always change the external Drive ID, but some needed to be
> opened up to change physical jumpers if I remember correctly.
> Peter
> Sent from my iPad
>> On 19 Nov 2020, at 04:16, Mouse <mouse at rodents-montreal.org> wrote:
>> o;?
>>> Sparcs were fiddly sysmtems with where things were expected to be on
>>> the SCSI bus.  ID3 was the default root drive, [...]
>> This depends, though I'm not sure what exactly it is it depends on.
>> ROM firmware version, maybe?  Machine type?
>> Some systems default sd0 to ID 3 as you say (with sd1 at ID 1, sd2 at
>> ID 2, and sd3 at ID 0); others have sd numbers equaling SCSI ID numbers
>> for 0-4 by default.  There may be other mappings, but those are the
>> only ones I recall seeing personally.  I never learnt what led to their
>> swapping 0 and 3 on some systems....
>> /~\ The ASCII                  Mouse
>> \ / Ribbon Campaign
>> X  Against HTML        mouse at rodents-montreal.org
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