Hello, I try to use multipath with SAS disk, transported by Fiber Channel, on Dell Compellent. My volume is detected on 2x R440 PowerEdge hosted by Centos 8 and orchestrated by oVirt. Problematic : On my two ovirt node with the same configuration and hardware specifications, I give this same behavor, one of my two link, is flapping ACTIVE to FAILED Something like this : # multipath -ll 36000d31003d5c2000000000000000010 dm-3 COMPELNT,Compellent Vol size=1.5T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=25 status=active |- 1:0:0:2 sdb 8:16 active ready running `- 1:0:1:2 sdc 8:32 failed ready running -- looping failed/ready Some interesting stuff : # multipathd show config : Full @ https://pastebin.fr/85965 blacklist { ··· device { vendor "COMPELNT" product "Compellent Vol" path_grouping_policy "multibus" no_path_retry "queue" } ··· } LogZ : Full @ https://pastebin.fr/85968 Feb 25 11:48:24 isildur-adm kernel: device-mapper: multipath: 253:3: Reinstating path 8:32. Feb 25 11:48:24 isildur-adm kernel: sd 1:0:1:2: alua: port group f01c state S non-preferred supports toluSNA Feb 25 11:48:24 isildur-adm kernel: device-mapper: multipath: 253:3: Failing path 8:32. Feb 25 11:48:25 isildur-adm multipathd[659460]: sdc: mark as failed # lsscsi -l [0:2:0:0] disk DELL PERC H330 Adp 4.30 /dev/sda state=running queue_depth=256 scsi_level=6 type=0 device_blocked=0 timeout=90 [1:0:0:2] disk COMPELNT Compellent Vol 0704 /dev/sdb state=running queue_depth=254 scsi_level=6 type=0 device_blocked=0 timeout=30 [1:0:1:2] disk COMPELNT Compellent Vol 0704 /dev/sdc state=running queue_depth=254 scsi_level=6 type=0 device_blocked=0 timeout=30 # lsmod | grep fc bnx2fc 110592 0 cnic 69632 1 bnx2fc libfcoe 77824 2 qedf,bnx2fc libfc 147456 3 qedf,bnx2fc,libfcoe scsi_transport_fc 69632 3 qedf,libfc,bnx2fc # lsmod | grep sas mpt3sas 303104 4 raid_class 16384 1 mpt3sas megaraid_sas 172032 2 scsi_transport_sas 45056 1mpt3sas I've made a misconfiguration ? Is It possible to use SAS over FC ? Thank you. Regards, Benoit Chatelain. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
