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  • 43P-140 + SCSI Adapter 4-K?

    From Michael Kraemer@21:1/5 to All on Tue Apr 15 21:37:27 2025
    hello RS6K-world,

    (herewith trying to revive this lost place a bit :-)

    I'm trying to use a 4-K (FC 6206, P/N 93H3809) as a secondary SCSI
    adapter in a 43P-140.
    It is recognized as scsi1, but no SCSI device (disk, tape)
    connected to it, internally or externally,
    ever shows up in the device list.
    Neither at the OS level nor at SMS level.
    Nothing in the error log.
    I exchanged everything I can think of:
    PCI slot, riser board, terminator magic, cable, adapter itself.
    I have three of these beasts, all showing the same symptom.
    Could it really be that all three of them are broken?
    Are they known to die as time goes by?
    Or am I overlooking sth else here?

    I'm slightly running out of ideas...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rick Ekblaw@21:1/5 to Michael Kraemer on Fri Jun 27 20:43:34 2025
    Michael Kraemer wrote:
    hello RS6K-world,

    (herewith trying to revive this lost place a bit :-)

    I'm trying to use a 4-K (FC 6206, P/N 93H3809) as a secondary SCSI
    adapter in a 43P-140.
    It is recognized as scsi1, but no SCSI device (disk, tape)
    connected to it, internally or externally,
    ever shows up in the device list.
    Neither at the OS level nor at SMS level.
    Nothing in the error log.
    I exchanged everything I can think of:
    PCI slot, riser board, terminator magic, cable, adapter itself.
    I have three of these beasts, all showing the same symptom.
    Could it really be that all three of them are broken?
    Are they known to die as time goes by?
    Or am I overlooking sth else here?

    I'm slightly running out of ideas...
    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. 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.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From home" @21:1/5 to Rick Ekblaw on Thu Jul 10 11:18:52 2025
    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.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)