[systemd-bugs] [Bug 63806] New: udev 202 mangles persistent disk/by-path w/ Intel C606 Dual 4-port SAS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63806

          Priority: medium
            Bug ID: 63806
          Assignee: systemd-bugs at lists.freedesktop.org
           Summary: udev 202  mangles persistent disk/by-path w/ Intel
                    C606 Dual 4-port SAS
        QA Contact: systemd-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: me at mooluv.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: general
           Product: systemd

by-path persistent device names overlap the 2nd 4-port section of the
controller on top of the first:

pci-0000:03:00.0-sas-0x500304800e246e00-lun-0 -> ../../sdc
pci-0000:03:00.0-sas-0x500304800e246e00-lun-0-part1 -> ../../sdc1
pci-0000:03:00.0-sas-0x500304800e246e01-lun-0 -> ../../sdd
pci-0000:03:00.0-sas-0x500304800e246e01-lun-0-part1 -> ../../sdd1
pci-0000:03:00.0-sas-0x500304800e246e01-lun-0-part2 -> ../../sdg2
pci-0000:03:00.0-sas-0x500304800e246e02-lun-0 -> ../../sde
pci-0000:03:00.0-sas-0x500304800e246e02-lun-0-part1 -> ../../sde1



sd[cde] are on ports 6:0-3 and sd[fg] are on ports 7:0-1 where 6 is the first
half and 7 is the second half of the "dual" hardware config.  Where a link
already exists with a particular name, no new one is created to the 2nd half. 
This is why /dev/sdf is not linked to and why there is an sdg2 but no sdg or
sdg1 (they would be the same as sdd and sdd1).

/devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:08.0/0000:03:00.0/host6/port-6:1/end_device-6:1/target6:0:1/6:0:1:0/block/sdd

/devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:08.0/0000:03:00.0/host7/port-7:1/end_device-7:1/target7:0:1/7:0:1:0/block/sdg

E: DEVLINKS=/dev/disk/by-id/ata-M4-CT128M4SSD2_00000000113003152D83
/dev/disk/by-id/wwn-0x500a075103152d83
/dev/disk/by-path/pci-0000:03:00.0-sas-0x500304800e246e01-lun-0

E: DEVLINKS=/dev/disk/by-id/ata-WD_WD30EFRX-68AX9N0_WD-WMC1T1636965
/dev/disk/by-id/wwn-0x50014ee0ae28a327
/dev/disk/by-path/pci-0000:03:00.0-sas-0x500304800e246e01-lun-0



Whatever is determining ID_PATH isn't doing it right in this case.  Let me know
what additional information I can provide.

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