The sas_address device attribute in sas_device sysfs in is 0x0, and missing (empty or null?) in scsi_disk sysfs on LTS kernel 5.10.x, and Stable 5.13.1 Specifically /sys/class/scsi_disk/X:X/device/sas_address and /sys/class/sas_device/end_device-X:X/sas_address are null and 0x0 respectively Using this device in hba mode (pass through) - Serial Attached SCSI controller: Adaptec Smart Storage PQI 12G SAS/PCIe 3 (rev 01) Subsystem: Hewlett-Packard Company Smart Array E208i-p SR Gen10 This appears to have regressed some time after 4.19 (expected results from 4.19 below) It seems that systemd udev depends on this attribute from sysfs to populate /dev/disk/by-path, and when it is unavailable the sas_address shows as 0x0, which breaks population of this directory, potentially breaking userspace tools that rely on this ================================================================== udevadm uses 0x0 for the address variable of ID_PATH, causing unique disks to have the same identifier used for ID_PATH, which breaks population of /dev/disk/by-path [bryce@myhost ~]$ udevadm info /dev/sdy | grep "ID_PATH="" E: ID_PATH=pci-0000:5c:00.0-sas-0x0000000000000000-lun-0 [bryce@myhost ~]$ udevadm info /dev/sdx | grep "ID_PATH="" E: ID_PATH=pci-0000:5c:00.0-sas-0x0000000000000000-lun-0 you can see the above 2 disks, should have a unique ID_PATH, and do not. ================================================================== In kernel sysfs, we see empty sas_address attribute for each disk attached to the hba in the scsi_disk sysfs [bryce@myhost ~]$ cat /sys/class/scsi_disk/*/device/sas_address cat: /sys/class/scsi_disk/0:0:0:0/device/sas_address: No such device cat: /sys/class/scsi_disk/0:0:1:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:0:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:10:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:1:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:11:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:12:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:13:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:14:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:15:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:16:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:17:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:18:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:19:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:20:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:2:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:21:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:22:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:23:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:3:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:4:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:5:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:6:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:7:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:8:0/device/sas_address: No such device cat: /sys/class/scsi_disk/1:0:9:0/device/sas_address: No such device ================================================================== See the following end device to pci device mapping [bryce@myhost ~]$ ls -al /sys/class/sas_device/ total 0 drwxr-xr-x 2 root root 0 Jul 13 16:06 . drwxr-xr-x 77 root root 0 Jul 13 16:06 .. lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-0:1 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/scsi_host/host0/port-0:1/end_device-0:1/sas_device/end_device-0:1 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-0:2 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/scsi_host/host0/port-0:2/end_device-0:2/sas_device/end_device-0:2 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-0:3 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/scsi_host/host0/port-0:3/end_device-0:3/sas_device/end_device-0:3 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:1 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:1/end_device-1:1/sas_device/end_device-1:1 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:10 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:10/end_device-1:10/sas_device/end_device-1:10 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:11 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:11/end_device-1:11/sas_device/end_device-1:11 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:12 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:12/end_device-1:12/sas_device/end_device-1:12 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:13 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:13/end_device-1:13/sas_device/end_device-1:13 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:14 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:14/end_device-1:14/sas_device/end_device-1:14 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:15 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:15/end_device-1:15/sas_device/end_device-1:15 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:16 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:16/end_device-1:16/sas_device/end_device-1:16 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:17 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:17/end_device-1:17/sas_device/end_device-1:17 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:18 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:18/end_device-1:18/sas_device/end_device-1:18 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:19 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:19/end_device-1:19/sas_device/end_device-1:19 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:2 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:2/end_device-1:2/sas_device/end_device-1:2 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:20 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:20/end_device-1:20/sas_device/end_device-1:20 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:21 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:21/end_device-1:21/sas_device/end_device-1:21 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:22 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:22/end_device-1:22/sas_device/end_device-1:22 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:23 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:23/end_device-1:23/sas_device/end_device-1:23 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:24 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:24/end_device-1:24/sas_device/end_device-1:24 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:25 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:25/end_device-1:25/sas_device/end_device-1:25 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:26 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:26/end_device-1:26/sas_device/end_device-1:26 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:27 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:27/end_device-1:27/sas_device/end_device-1:27 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:3 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:3/end_device-1:3/sas_device/end_device-1:3 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:4 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:4/end_device-1:4/sas_device/end_device-1:4 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:5 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:5/end_device-1:5/sas_device/end_device-1:5 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:6 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:6/end_device-1:6/sas_device/end_device-1:6 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:7 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:7/end_device-1:7/sas_device/end_device-1:7 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:8 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:8/end_device-1:8/sas_device/end_device-1:8 lrwxrwxrwx 1 root root 0 Jul 13 16:06 end_device-1:9 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/scsi_host/host1/port-1:9/end_device-1:9/sas_device/end_device-1:9 ================================================================== and 0x0 in sysfs for sas_device/end_device sas_addresses (this is what breaks udev) [bryce@myhost ~]$ for d in $(ls /sys/class/sas_device/end_device*/sas_address); do echo $d; cat $d;done /sys/class/sas_device/end_device-0:1/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-0:2/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-0:3/sas_address 0x51402ec0130545a8 /sys/class/sas_device/end_device-1:10/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:11/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:12/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:13/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:14/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:15/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:16/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:17/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:18/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:19/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:1/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:20/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:21/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:22/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:23/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:24/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:25/sas_address 0x50014380436ed4bc /sys/class/sas_device/end_device-1:26/sas_address 0x50014380436ec7fc /sys/class/sas_device/end_device-1:27/sas_address 0x51402ec013612638 /sys/class/sas_device/end_device-1:2/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:3/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:4/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:5/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:6/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:7/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:8/sas_address 0x0000000000000000 /sys/class/sas_device/end_device-1:9/sas_address 0x0000000000000000 ================================================================== lspci -vvv output 38:00.0 Serial Attached SCSI controller: Adaptec Smart Storage PQI 12G SAS/PCIe 3 (rev 01) Subsystem: Hewlett-Packard Company Smart Array E208i-a SR Gen10 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 30 NUMA node: 0 Region 0: Memory at e2800000 (64-bit, non-prefetchable) [size=32K] Region 4: I/O ports at 6000 [size=256] Capabilities: [80] Power Management version 3 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0+,D1+,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [b0] MSI-X: Enable+ Count=64 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00003000 Capabilities: [c0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <4us, L1 <1us ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W DevCtl: Report errors: Correctable- Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ MaxPayload 256 bytes, MaxReadReq 4096 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L1, Exit Latency L0s <1us, L1 <1us ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 8GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-, OBFF Via message DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+ EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest- Capabilities: [100 v2] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP- SDES+ TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ CEMsk: RxErr+ BadTLP+ BadDLLP+ Rollover+ Timeout+ NonFatalErr+ AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Capabilities: [300 v1] #19 Kernel driver in use: smartpqi 5c:00.0 Serial Attached SCSI controller: Adaptec Smart Storage PQI 12G SAS/PCIe 3 (rev 01) Subsystem: Hewlett-Packard Company Smart Array E208i-p SR Gen10 Physical Slot: 1 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 32 NUMA node: 1 Region 0: Memory at e6c00000 (64-bit, non-prefetchable) [size=32K] Region 4: I/O ports at 8000 [size=256] Capabilities: [80] Power Management version 3 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0+,D1+,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [b0] MSI-X: Enable+ Count=64 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00003000 Capabilities: [c0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <4us, L1 <1us ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W DevCtl: Report errors: Correctable- Non-Fatal+ Fatal+ Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ MaxPayload 256 bytes, MaxReadReq 4096 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L1, Exit Latency L0s <1us, L1 <1us ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+ LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 8GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR-, OBFF Via message DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+ EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest- Capabilities: [100 v2] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP- SDES+ TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ CEMsk: RxErr+ BadTLP+ BadDLLP+ Rollover+ Timeout+ NonFatalErr+ AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Capabilities: [300 v1] #19 Kernel driver in use: smartpqi ================================================================== linux version Linux version 5.13.1-1.el7.x86_64 (bryce@myhost2) (gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2), GNU ld version 2.32-16.el7) #1 SMP Tue Jul 13 15:46:58 UTC 2021 ================================================================== .config I Think the only relevant thing in .config are the following, I can paste the entire .config if you think necessary CONFIG_SCSI_SMARTPQI=y CONFIG_SCSI_SAS_ATTRS=y CONFIG_SCSI_SAS_LIBSAS=m CONFIG_SCSI_SAS_ATA=y ================================================================== [bryce@myhost ~]$ sudo cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: MK000480GWSSC Rev: HPG0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi0 Channel: 00 Id: 01 Lun: 00 Vendor: ATA Model: MK000480GWSSC Rev: HPG0 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi0 Channel: 00 Id: 02 Lun: 00 Vendor: HPE Model: Smart Adapter Rev: 3.53 Type: Enclosure ANSI SCSI revision: 05 Host: scsi0 Channel: 02 Id: 00 Lun: 00 Vendor: HPE Model: E208i-a SR Gen10 Rev: 3.53 Type: RAID ANSI SCSI revision: 05 Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 01 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 02 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 03 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 04 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 05 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 06 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 07 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 08 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 09 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 10 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 11 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 12 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 13 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 14 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 15 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 16 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 17 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 18 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 19 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 20 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 21 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 22 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 23 Lun: 00 Vendor: ATA Model: MB012000GWDFE Rev: HPG2 Type: Direct-Access ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 24 Lun: 00 Vendor: HPE Model: Apollo 4200 LFF Rev: 1.78 Type: Enclosure ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 25 Lun: 00 Vendor: HPE Model: Apollo 4200 LFF Rev: 1.78 Type: Enclosure ANSI SCSI revision: 06 Host: scsi1 Channel: 00 Id: 26 Lun: 00 Vendor: HPE Model: Smart Adapter Rev: 3.53 Type: Enclosure ANSI SCSI revision: 05 Host: scsi1 Channel: 02 Id: 00 Lun: 00 Vendor: HPE Model: E208i-p SR Gen10 Rev: 3.53 Type: RAID ANSI SCSI revision: 05 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: Generic- Model: SD/MMC CRW Rev: 1.00 Type: Direct-Access ANSI SCSI revision: 06 ================================================================== modules (shouldn't matter, using kernel driver) [bryce@myhost ~]$ cat /proc/modules binfmt_misc 24576 1 - Live 0x0000000000000000 fuse 143360 5 - Live 0x0000000000000000 scsi_transport_iscsi 139264 1 - Live 0x0000000000000000 bonding 196608 0 - Live 0x0000000000000000 tls 110592 1 bonding, Live 0x0000000000000000 xt_TCPMSS 16384 4 - Live 0x0000000000000000 xt_multiport 20480 4 - Live 0x0000000000000000 ip6table_mangle 16384 1 - Live 0x0000000000000000 ip6t_REJECT 16384 2 - Live 0x0000000000000000 nf_reject_ipv6 20480 1 ip6t_REJECT, Live 0x0000000000000000 ip6table_filter 16384 1 - Live 0x0000000000000000 ip6table_raw 16384 1 - Live 0x0000000000000000 ip6_tables 28672 3 ip6table_mangle,ip6table_filter,ip6table_raw, Live 0x0000000000000000 ipt_REJECT 16384 2 - Live 0x0000000000000000 nf_reject_ipv4 16384 1 ipt_REJECT, Live 0x0000000000000000 xt_conntrack 16384 2 - Live 0x0000000000000000 iptable_filter 16384 1 - Live 0x0000000000000000 xt_CT 16384 42 - Live 0x0000000000000000 nf_conntrack 163840 2 xt_conntrack,xt_CT, Live 0x0000000000000000 nf_defrag_ipv6 24576 1 nf_conntrack, Live 0x0000000000000000 nf_defrag_ipv4 16384 1 nf_conntrack, Live 0x0000000000000000 iptable_raw 16384 1 - Live 0x0000000000000000 intel_powerclamp 20480 0 - Live 0x0000000000000000 coretemp 20480 0 - Live 0x0000000000000000 kvm_intel 339968 0 - Live 0x0000000000000000 kvm 1007616 1 kvm_intel, Live 0x0000000000000000 irqbypass 16384 1 kvm, Live 0x0000000000000000 crct10dif_pclmul 16384 1 - Live 0x0000000000000000 mgag200 36864 0 - Live 0x0000000000000000 crc32_pclmul 16384 0 - Live 0x0000000000000000 mlx5_ib 389120 0 - Live 0x0000000000000000 ib_uverbs 167936 1 mlx5_ib, Live 0x0000000000000000 drm_kms_helper 278528 1 mgag200, Live 0x0000000000000000 ghash_clmulni_intel 16384 0 - Live 0x0000000000000000 drm 663552 2 mgag200,drm_kms_helper, Live 0x0000000000000000 syscopyarea 16384 1 drm_kms_helper, Live 0x0000000000000000 sysfillrect 16384 1 drm_kms_helper, Live 0x0000000000000000 aesni_intel 380928 0 - Live 0x0000000000000000 crypto_simd 16384 1 aesni_intel, Live 0x0000000000000000 sysimgblt 16384 1 drm_kms_helper, Live 0x0000000000000000 acpi_ipmi 20480 0 - Live 0x0000000000000000 ib_core 413696 2 mlx5_ib,ib_uverbs, Live 0x0000000000000000 pcspkr 16384 0 - Live 0x0000000000000000 cryptd 24576 2 ghash_clmulni_intel,crypto_simd, Live 0x0000000000000000 mei_me 45056 0 - Live 0x0000000000000000 fb_sys_fops 16384 1 drm_kms_helper, Live 0x0000000000000000 ipmi_si 77824 2 - Live 0x0000000000000000 i2c_algo_bit 16384 1 mgag200, Live 0x0000000000000000 ses 20480 0 - Live 0x0000000000000000 lpc_ich 28672 0 - Live 0x0000000000000000 ipmi_devintf 20480 2 - Live 0x0000000000000000 ioatdma 65536 0 - Live 0x0000000000000000 enclosure 16384 1 ses, Live 0x0000000000000000 mfd_core 20480 1 lpc_ich, Live 0x0000000000000000 hpilo 24576 4 - Live 0x0000000000000000 i2c_core 102400 4 mgag200,drm_kms_helper,drm,i2c_algo_bit, Live 0x0000000000000000 hpwdt 20480 0 - Live 0x0000000000000000 mei 151552 1 mei_me, Live 0x0000000000000000 dca 16384 1 ioatdma, Live 0x0000000000000000 wmi 32768 0 - Live 0x0000000000000000 ipmi_msghandler 118784 3 acpi_ipmi,ipmi_si,ipmi_devintf, Live 0x0000000000000000 acpi_power_meter 20480 0 - Live 0x0000000000000000 brd 16384 1 - Live 0x0000000000000000 ip_tables 28672 2 iptable_filter,iptable_raw, Live 0x0000000000000000 crc32c_intel 24576 2 - Live 0x0000000000000000 mlx5_core 1298432 1 mlx5_ib, Live 0x0000000000000000 mlxfw 36864 1 mlx5_core, Live 0x0000000000000000 psample 20480 1 mlx5_core, Live 0x0000000000000000 uas 32768 0 - Live 0x0000000000000000 usb_storage 81920 1 uas, Live 0x0000000000000000 dummy 16384 0 - Live 0x0000000000000000 ================================================================== ********** 4.19 kernel expected results **************** ********** Everything below here is working as expected, with kernel version 4.19 ********** [bryce@myhost ~]$ uname -r 4.19.132-1.el7.x86_64 [bryce@myhost ~]$ sudo udevadm info /dev/sdy | grep "ID_PATH=" E: ID_PATH=pci-0000:5c:00.0-sas-0x50014380436ed48a-lun-0 [bryce@myhost ~]$ sudo udevadm info /dev/sdx | grep "ID_PATH=" E: ID_PATH=pci-0000:5c:00.0-sas-0x50014380436ed489-lun-0 note the ID_PATH var for udev is unique, and matches what sysfs shows in /sys/class/scsi_disk/X:X/device/sas_address ================================================================== [bryce@myhost ~]$ cat /sys/class/scsi_disk/*/device/sas_address 0x31402ec0130545a0 0x31402ec0130545a2 0x50014380436ec7c0 0x50014380436ec7ca 0x50014380436ec7c1 0x50014380436ec7cb 0x50014380436ed480 0x50014380436ed481 0x50014380436ed482 0x50014380436ed483 0x50014380436ed484 0x50014380436ed485 0x50014380436ed486 0x50014380436ed487 0x50014380436ed488 0x50014380436ec7c2 0x50014380436ed489 0x50014380436ed48a 0x50014380436ed48b 0x50014380436ec7c3 0x50014380436ec7c4 0x50014380436ec7c5 0x50014380436ec7c6 0x50014380436ec7c7 0x50014380436ec7c8 0x50014380436ec7c9 ================================================================== [bryce@myhost ~]$ ls -al /sys/class/sas_device/ total 0 drwxr-xr-x 2 root root 0 Jul 13 20:40 . drwxr-xr-x 73 root root 0 Jul 13 20:35 .. lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-0:1 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/port-0:1/end_device-0:1/sas_device/end_device-0:1 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-0:2 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/port-0:2/end_device-0:2/sas_device/end_device-0:2 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-0:3 -> ../../devices/pci0000:36/0000:36:02.0/0000:38:00.0/host0/port-0:3/end_device-0:3/sas_device/end_device-0:3 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:1 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:1/end_device-1:1/sas_device/end_device-1:1 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:10 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:10/end_device-1:10/sas_device/end_device-1:10 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:11 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:11/end_device-1:11/sas_device/end_device-1:11 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:12 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:12/end_device-1:12/sas_device/end_device-1:12 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:13 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:13/end_device-1:13/sas_device/end_device-1:13 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:14 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:14/end_device-1:14/sas_device/end_device-1:14 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:15 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:15/end_device-1:15/sas_device/end_device-1:15 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:16 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:16/end_device-1:16/sas_device/end_device-1:16 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:17 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:17/end_device-1:17/sas_device/end_device-1:17 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:18 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:18/end_device-1:18/sas_device/end_device-1:18 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:19 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:19/end_device-1:19/sas_device/end_device-1:19 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:2 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:2/end_device-1:2/sas_device/end_device-1:2 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:20 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:20/end_device-1:20/sas_device/end_device-1:20 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:21 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:21/end_device-1:21/sas_device/end_device-1:21 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:22 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:22/end_device-1:22/sas_device/end_device-1:22 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:23 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:23/end_device-1:23/sas_device/end_device-1:23 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:24 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:24/end_device-1:24/sas_device/end_device-1:24 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:25 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:25/end_device-1:25/sas_device/end_device-1:25 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:26 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:26/end_device-1:26/sas_device/end_device-1:26 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:27 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:27/end_device-1:27/sas_device/end_device-1:27 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:3 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:3/end_device-1:3/sas_device/end_device-1:3 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:4 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:4/end_device-1:4/sas_device/end_device-1:4 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:5 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:5/end_device-1:5/sas_device/end_device-1:5 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:6 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:6/end_device-1:6/sas_device/end_device-1:6 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:7 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:7/end_device-1:7/sas_device/end_device-1:7 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:8 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:8/end_device-1:8/sas_device/end_device-1:8 lrwxrwxrwx 1 root root 0 Jul 13 20:35 end_device-1:9 -> ../../devices/pci0000:5b/0000:5b:00.0/0000:5c:00.0/host1/port-1:9/end_device-1:9/sas_device/end_device-1:9 ================================================================== [bryce@myhost ~]$ for d in $(ls /sys/class/sas_device/end_device*/sas_address); do echo $d; cat $d;done /sys/class/sas_device/end_device-0:1/sas_address 0x31402ec0130545a0 /sys/class/sas_device/end_device-0:2/sas_address 0x31402ec0130545a2 /sys/class/sas_device/end_device-0:3/sas_address 0x51402ec0130545a8 /sys/class/sas_device/end_device-1:10/sas_address 0x50014380436ec7c9 /sys/class/sas_device/end_device-1:11/sas_address 0x50014380436ec7ca /sys/class/sas_device/end_device-1:12/sas_address 0x50014380436ec7cb /sys/class/sas_device/end_device-1:13/sas_address 0x50014380436ed480 /sys/class/sas_device/end_device-1:14/sas_address 0x50014380436ed481 /sys/class/sas_device/end_device-1:15/sas_address 0x50014380436ed482 /sys/class/sas_device/end_device-1:16/sas_address 0x50014380436ed483 /sys/class/sas_device/end_device-1:17/sas_address 0x50014380436ed484 /sys/class/sas_device/end_device-1:18/sas_address 0x50014380436ed485 /sys/class/sas_device/end_device-1:19/sas_address 0x50014380436ed486 /sys/class/sas_device/end_device-1:1/sas_address 0x50014380436ec7c0 /sys/class/sas_device/end_device-1:20/sas_address 0x50014380436ed487 /sys/class/sas_device/end_device-1:21/sas_address 0x50014380436ed488 /sys/class/sas_device/end_device-1:22/sas_address 0x50014380436ed489 /sys/class/sas_device/end_device-1:23/sas_address 0x50014380436ed48a /sys/class/sas_device/end_device-1:24/sas_address 0x50014380436ed48b /sys/class/sas_device/end_device-1:25/sas_address 0x50014380436ed4bc /sys/class/sas_device/end_device-1:26/sas_address 0x50014380436ec7fc /sys/class/sas_device/end_device-1:27/sas_address 0x51402ec013612638 /sys/class/sas_device/end_device-1:2/sas_address 0x50014380436ec7c1 /sys/class/sas_device/end_device-1:3/sas_address 0x50014380436ec7c2 /sys/class/sas_device/end_device-1:4/sas_address 0x50014380436ec7c3 /sys/class/sas_device/end_device-1:5/sas_address 0x50014380436ec7c4 /sys/class/sas_device/end_device-1:6/sas_address 0x50014380436ec7c5 /sys/class/sas_device/end_device-1:7/sas_address 0x50014380436ec7c6 /sys/class/sas_device/end_device-1:8/sas_address 0x50014380436ec7c7 /sys/class/sas_device/end_device-1:9/sas_address 0x50014380436ec7c8
