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Re: 43P-140 + SCSI Adapter 4-K?

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Rick Ekblaw wrote:

Thanks for your reply.

> I looked through the 7043-140 Announcement Letter 
> (https://www.ibm.com/docs/en/announcements/archive/ENUSAG96-0340) and 
> that indicates that you want either feature code 6208 (single-ended)4-A 
> or 6209 (differential)4-B SCSI adapters to expand your 43P-140.  

I have another announcement letter (redacted in 2009),
https://web-docs.gsi.de/~kraemer/COLLECTION/IBM/IBM_RS-6000_43P_Model_140.html
saying that the 4-K is supported.
(I guess the IBM archive refers to an older announcement)

> The 
> 43P-140 User Manual says that you can install an Ultra SCSI adapter 
> (like your 4-K) but it has to go in slot 5 and the manual suggests 
> removing the SCSI cable from the system board and attaching all of your 
> SCSI disks to the Ultra adapter and only attach disks that can operate 
> at Ultra speeds.

"Adapter Placement Reference for AIX", SA38-0538-24
does not mention such restrictions.

I guess the above recommendation refers to the case,
where one wants to bypass the onboard SCSI and to connect
the internal disks to an extra adapter.
In this case the 5P makes sense because its on the right side
of the riser board.
For slots 1P to 4P one would have to fudge the ribbon cable across the riser board.

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43P-140 + SCSI Adapter 4-K? Michael Kraemer <m.kraemer@gsi.de> - 2025-04-15 21:37 +0200
  Re: 43P-140 + SCSI Adapter 4-K? Rick Ekblaw <ekblaw@vnet.ibm.com> - 2025-06-27 20:43 -0400
    Re: 43P-140 + SCSI Adapter 4-K? "Michael Kraemer @ home" <M.Kraemer@gsi.de> - 2025-07-10 11:18 +0200

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