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Description of problem: On RHEL8.x (8.0 and 8.1)systems with LUNs mapped from Nimble Storage Controllers, the Blacklist exception entry property "(SCSI_IDENT_|ID_WWN)" in multipath.conf causes the paths to be displayed as faulty in multipath -ll output. See the output below [root@rtp-hpe-ops07 ~]# multipath -ll mpatha (204e7317153404e246c9ce900d54f5505) dm-0 ##,## size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=0 status=active | |- #:#:#:# sdb 8:16 active faulty running | |- #:#:#:# sdc 8:32 active faulty running | |- #:#:#:# sdg 8:96 active faulty running | `- #:#:#:# sdh 8:112 active faulty running `-+- policy='service-time 0' prio=0 status=enabled |- #:#:#:# sdd 8:48 active faulty running |- #:#:#:# sde 8:64 active faulty running |- #:#:#:# sdf 8:80 active faulty running `- #:#:#:# sdi 8:128 active faulty running Multipath.conf looks like below: defaults { user_friendly_names yes } blacklist { } blacklist_exceptions { property "(SCSI_IDENT_|ID_WWN)" } devices { device { product "Server" failback immediate path_grouping_policy group_by_prio no_path_retry 30 dev_loss_tmo infinity hardware_handler "1 alua" fast_io_fail_tmo 5 rr_min_io_rq 1 vendor "Nimble" rr_weight uniform path_checker tur prio "alua" path_selector "service-time 0" } } Once the blacklist exception entry is commented out the multipath -ll output reports the path states correctly. See below: [root@rtp-hpe-ops07 ~]# multipath -ll mpatha (204e7317153404e246c9ce900d54f5505) dm-0 Nimble,Server size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=50 status=active | |- 3:0:0:0 sdb 8:16 active ready running | |- 3:0:1:0 sdc 8:32 active ready running | |- 5:0:1:0 sdg 8:96 active ready running | `- 5:0:2:0 sdh 8:112 active ready running `-+- policy='service-time 0' prio=1 status=enabled |- 3:0:2:0 sdd 8:48 active ghost running |- 3:0:3:0 sde 8:64 active ghost running |- 5:0:0:0 sdf 8:80 active ghost running `- 5:0:3:0 sdi 8:128 active ghost running Version-Release number of selected component (if applicable): device-mapper-event-1.02.163-5.el8.x86_64 device-mapper-libs-1.02.163-5.el8.x86_64 device-mapper-persistent-data-0.8.5-2.el8.x86_64 device-mapper-event-libs-1.02.163-5.el8.x86_64 device-mapper-multipath-libs-0.8.0-5.el8.x86_64 device-mapper-1.02.163-5.el8.x86_64 device-mapper-multipath-0.8.0-5.el8.x86_64 How reproducible: Steps to Reproduce: 1.Install RH8.x and enable multipath. 2.Create and map a few LUNs from Nimble Storage controller to the server 3.Add the below entry to multipath.conf file blacklist_exceptions { property "(SCSI_IDENT_|ID_WWN)" } 4.Reload multipath 5. Fire the command multipath -ll Actual results: Paths are listed as faulty [root@rtp-hpe-ops07 ~]# multipath -ll mpatha (204e7317153404e246c9ce900d54f5505) dm-0 ##,## size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=0 status=active | |- #:#:#:# sdb 8:16 active faulty running | |- #:#:#:# sdc 8:32 active faulty running | |- #:#:#:# sdg 8:96 active faulty running | `- #:#:#:# sdh 8:112 active faulty running `-+- policy='service-time 0' prio=0 status=enabled |- #:#:#:# sdd 8:48 active faulty running |- #:#:#:# sde 8:64 active faulty running |- #:#:#:# sdf 8:80 active faulty running `- #:#:#:# sdi 8:128 active faulty running Expected results: Paths should be displayed as below: [root@rtp-hpe-ops07 ~]# multipath -ll mpatha (204e7317153404e246c9ce900d54f5505) dm-0 Nimble,Server size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=50 status=active | |- 3:0:0:0 sdb 8:16 active ready running | |- 3:0:1:0 sdc 8:32 active ready running | |- 5:0:1:0 sdg 8:96 active ready running | `- 5:0:2:0 sdh 8:112 active ready running `-+- policy='service-time 0' prio=1 status=enabled |- 3:0:2:0 sdd 8:48 active ghost running |- 3:0:3:0 sde 8:64 active ghost running |- 5:0:0:0 sdf 8:80 active ghost running `- 5:0:3:0 sdi 8:128 active ghost running Additional info:
Created attachment 1667291 [details] sos report from the host
Do you know if this continues to happen in rhel-8.2? The fixes for the sg3_utils bzs #1746414 and #1785062 added udev rules that should set SCSI_IDENT_*, so this will hopefully work correctly now.
I don't see this on RHEL-8.2. [root@rtp-hpe-ops07 ~]# cat /etc/redhat-release Red Hat Enterprise Linux release 8.2 (Ootpa) [root@rtp-hpe-ops07 ~]# cat /etc/multipath.conf defaults { user_friendly_names yes } blacklist { } blacklist_exceptions { property "(SCSI_IDENT_|ID_WWN)" } devices { device { product "Server" failback immediate path_grouping_policy group_by_prio no_path_retry 30 dev_loss_tmo infinity hardware_handler "1 alua" fast_io_fail_tmo 5 rr_min_io_rq 1 vendor "Nimble" rr_weight uniform path_checker tur prio "alua" path_selector "service-time 0" } } [root@rtp-hpe-ops07 ~]# multipath -ll mpathe (23841f8cda17bd2d36c9ce9003c1acdc6) dm-8 Nimble,Server size=650G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=50 status=active |- 6:0:0:11 sdaa 65:160 active ready running |- 6:0:1:11 sdac 65:192 active ready running |- 6:0:2:11 sdae 65:224 active ready running |- 6:0:3:11 sdag 66:0 active ready running |- 7:0:0:11 sdai 66:32 active ready running |- 7:0:1:11 sdak 66:64 active ready running |- 7:0:2:11 sdam 66:96 active ready running `- 7:0:3:11 sdao 66:128 active ready running Thanks, Amaresh
Great. I'm closing this as a duplicate of 1785062, which adds /usr/lib/udev/rules.d/61-scsi-sg3_id.rules, and fixes this problem. *** This bug has been marked as a duplicate of bug 1785062 ***