76i and SCSI F/W Adapter (Corvette Turbo)

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michael dombrowski

2025-01-06 01:46:03 UTC

I have a 76i (Lacuna) and what I believe to be a Corvette Turbo
(93h7896). From my reading, I believe these two to be compatible. If I
load up the appropriate ADFs, I can see the card settings when using
the ref disk, but whenever I try and boot I get error "02067020 10EH"

Any ideas?

mike

Louis Ohland

2025-01-06 12:44:24 UTC

Permalink

93h7896 4-C Enhanced SCSI-2 Fast/Wide Differential Adapter/A
https://www.ardent-tool.com/IBM_SCSI/SCSI-DFW.html#DFW_Enhanced

Laughter through tears. The EDFW does not have a SCSI BIOS [no Korvetten
class does either...]. The Lacuna is IDE-biased [IDE controller
on-board] and has a FLASH BIOS.

Systems with a on-board SCSI controller can provide a SCSI BIOS, or if
you have another IBM SCSI adapter [like a Spock] the EDFW can dog-rob
the existing SCSI BIOS.

Probulations suggest the Korvetten class SCSI uCode [e.g. firmware] has
a "SCSI Stub" that points to an existing SCSI BIOS that has been loaded
into RAM. Either another IBM SCSI adapter _OR_ a system that has IML
support in it's BIOS [e.g. Model 90 or Model 95] can provide the
required SCSI BIOS support in IML.

All Korvetten-class [includes the 4-C] are RS/6000 adapters. I _think_
POWER2 / PPC 601 and better systems have the needed SCSI BIOS support in
the O/S.
https://www.ardent-tool.com/IBM_SCSI/SCSI-FW.html#RS6000_Boot_Support

02067020
206 SCSI-2 F/W [all Korvetten class]
7 SCSI ID
0 LUN [all IBM SCSI uses 0]
2 Slot
0 internal bus

10Ex Command error (invalid command or parameter)
H Adapter info test state (buffer enable, buffer size, retry, enable)

Post by michael dombrowski
I have a 76i (Lacuna) and what I believe to be a Corvette Turbo
(93h7896). From my reading, I believe these two to be compatible. If I
load up the appropriate ADFs, I can see the card settings when using
the ref disk, but whenever I try and boot I get error "02067020 10EH"
Any ideas?
mike

Kevin Bowling

2025-01-06 21:14:34 UTC

Permalink

Post by Louis Ohland
93h7896 4-C Enhanced SCSI-2 Fast/Wide Differential Adapter/A
https://www.ardent-tool.com/IBM_SCSI/SCSI-DFW.html#DFW_Enhanced
Laughter through tears. The EDFW does not have a SCSI BIOS [no Korvetten
class does either...]. The Lacuna is IDE-biased [IDE controller on-
board] and has a FLASH BIOS.
Systems with a on-board SCSI controller can provide a SCSI BIOS, or if
you have another IBM SCSI adapter [like a Spock] the EDFW can dog-rob
the existing SCSI BIOS.
Probulations suggest the Korvetten class SCSI uCode [e.g. firmware] has
a "SCSI Stub" that points to an existing SCSI BIOS that has been loaded
into RAM. Either another IBM SCSI adapter _OR_ a system that has IML
support in it's BIOS [e.g. Model 90 or Model 95] can provide the
required SCSI BIOS support in IML.
All Korvetten-class [includes the 4-C] are RS/6000 adapters. I _think_
POWER2 / PPC 601 and better systems have the needed SCSI BIOS support in
the O/S.
https://www.ardent-tool.com/IBM_SCSI/SCSI-FW.html#RS6000_Boot_Support

Yes, the ROS is somewhat analogous to BIOS but has almost no user
interface. The POWER2 and PPC (601/604) ROS have additional support for
newer adapters. It has direct knowledge for boot support from the
various adapters as well as netboot - which is the only serial config
interface I am aware of from ROS - everything else ROS is configured via
AIX and you just get the 3 digit LED codes for information from it until
AIX kernel takes over.

Post by Louis Ohland
02067020
206 SCSI-2 F/W [all Korvetten class]
7 SCSI ID
0 LUN [all IBM SCSI uses 0]
2 Slot
0 internal bus
10Ex Command error (invalid command or parameter)
H Adapter info test state (buffer enable, buffer size, retry, enable)

michael dombrowski

2025-01-08 00:45:40 UTC

Permalink

On Mon, 6 Jan 2025 14:14:34 -0700

Post by Kevin Bowling

Post by Louis Ohland
93h7896 4-C Enhanced SCSI-2 Fast/Wide Differential Adapter/A
https://www.ardent-tool.com/IBM_SCSI/SCSI-DFW.html#DFW_Enhanced
Laughter through tears. The EDFW does not have a SCSI BIOS [no
Korvetten class does either...]. The Lacuna is IDE-biased [IDE
controller on- board] and has a FLASH BIOS.
Systems with a on-board SCSI controller can provide a SCSI BIOS, or
if you have another IBM SCSI adapter [like a Spock] the EDFW can
dog-rob the existing SCSI BIOS.
Probulations suggest the Korvetten class SCSI uCode [e.g. firmware]
has a "SCSI Stub" that points to an existing SCSI BIOS that has
been loaded into RAM. Either another IBM SCSI adapter _OR_ a system
that has IML support in it's BIOS [e.g. Model 90 or Model 95] can
provide the required SCSI BIOS support in IML.
All Korvetten-class [includes the 4-C] are RS/6000 adapters. I
_think_ POWER2 / PPC 601 and better systems have the needed SCSI
BIOS support in the O/S.
https://www.ardent-tool.com/IBM_SCSI/SCSI-FW.html#RS6000_Boot_Support

Yes, the ROS is somewhat analogous to BIOS but has almost no user
interface. The POWER2 and PPC (601/604) ROS have additional support
for newer adapters. It has direct knowledge for boot support from
the various adapters as well as netboot - which is the only serial
config interface I am aware of from ROS - everything else ROS is
configured via AIX and you just get the 3 digit LED codes for
information from it until AIX kernel takes over.

Post by michael dombrowski
I have a 76i (Lacuna) and what I believe to be a Corvette Turbo
(93h7896). From my reading, I believe these two to be compatible.
If I load up the appropriate ADFs, I can see the card settings
when using the ref disk, but whenever I try and boot I get error
"02067020 10EH"
Any ideas?
mike

Thanks folks. I was glad to hear this newsgroup was still around - I
used to read it religiously decades ago - and I knew that if an answer
was to be found, it was here.

I tried the card in my 76 Bermuda and it does seem to work (although I
lack the proper SCSI cables to try properly).

I'll look for a 76 compatible SCSI card

thanks
mike