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Systems using zFCP for access to SCSI disks on Red Hat Enterprise Linux 4 require a hardware fibre channel switch to be connected between the mainframe and disk storage. This update enables point-to-point connections, which are fibre connections directly from the mainframe to the disk storage. While connection to a fibre channel switch is still supported, it is no longer required.
Description of problem: Request to backport support for point-to-point connection to zfcp module. Patch was added to RHEL 5 in bug 184650. This was checked in upstream 2005-04-21: http://marc.theaimsgroup.com/?l=git-commits-head&m=111406526331444&w=2 Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Without patch, when point-to-point is detected, the following error is printed: "error: Point-to-point fibrechannel configuration detected at adapter [..] unsupported, shutting down adapter" With patch, message is logged: "Point-to-Point fibrechannel configuration detected at adapter [..]" "Peer WWNN 0x[..]" "peer WWPN 0x[..]" "peer d_id 0x[..]"
Created attachment 306969 [details] Backport from RHEL 5
Posted to rhkernel on May 30. 2008 by Hans-Joachim Picht <hpicht@redhat.com>
------- Comment From hans@de.ibm.com 2008-05-30 10:39 EDT------- The patch as been reviewed and is acceptable. Furthermore the patch has been posted to rhkernel. A Red Hat Customer has tested the patch and reported that it works.
After talking with IBM System z folks, they've noted: Do we know what specific reasons this customer needs the PTP functionality in RHEL? Do we believe that this patch would be sufficient to ensure production level support for the customer or might more be required?
In response to comment 4, this patch is sufficient for production level support. The PTP functionality is due to lack of FC switch in their environment, and inability to move to RHEL 5 at this time.
------- Comment From mgrf@de.ibm.com 2008-06-09 03:03 EDT------- Hello Red Hat, I assume you plan to include this for RHEL4.7. Is that correct?
Updating PM score.
Committed in 78.21.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
Release note added. If any revisions are required, please set the "requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: * s/390 systems using zFCP for access to SCSI disks on Red Hat Enterprise Linux 4 require a hardware fibre channel switch to be connected between the mainframe and disk storage. This update enables point-to-point connections, which are fibre connections directly from the mainframe to the disk storage. While connection to a fibre channel switch is still supported, it is no longer required.
Release note updated. If any revisions are required, please set the "requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. Diffed Contents: @@ -1 +1 @@ -* s/390 systems using zFCP for access to SCSI disks on Red Hat Enterprise Linux 4 require a hardware fibre channel switch to be connected between the mainframe and disk storage. This update enables point-to-point connections, which are fibre connections directly from the mainframe to the disk storage. While connection to a fibre channel switch is still supported, it is no longer required.+Systems using zFCP for access to SCSI disks on Red Hat Enterprise Linux 4 require a hardware fibre channel switch to be connected between the mainframe and disk storage. This update enables point-to-point connections, which are fibre connections directly from the mainframe to the disk storage. While connection to a fibre channel switch is still supported, it is no longer required.
Patch is in -88.EL kernel.
------- Comment From mgrf@de.ibm.com 2009-05-06 04:48 EDT------- Hello Red Hat, just to note This is a backport provided by Red Hat, therefore the resolution "fix_by_IBM" in Red Hat BZ is not correct.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1024.html