You can use active/active on FC and on SAS. But some cheaper/simpler arrays/devices are not active/active, they are active/passive and that requires a scsi_dh* module to handle the non-active/non-responding path correctly. I don't know if yours is one of those. You will need to find the vendors how-to doc on the required config options as some options will not work on some devices, and in some cases there may need to also be things set in the array itself to allow certain things multipath needs to do. On Mon, Mar 1, 2021 at 7:54 AM <bchatelain@xxxxxxxx> wrote: > > 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 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
