On 03/08/2018 09:03 AM, Chongyun Wu wrote: [add dm-devel@xxxxxxxxxx] > 360002ac000000000000004f40001e2d7 dm-5 3PARdata,VV > size=13G features='1 queue_if_no_path' hwhandler='0' wp=rw > `-+- policy='round-robin 0' prio=1 status=active > |- 3:0:0:3 sdk 8:160 active ready running > |- 4:0:0:3 sdn 8:208 active ready running > |- 3:0:0:6 sdo 8:224 failed faulty running > `- 4:0:0:6 sdp 8:240 failed faulty running 3PAR arrays are able to use ALUA, but with *all ports* *across all controllers* in *single Target Port Group* : 31000000000000a000000000000001000 dm-0 3PARdata,VV size=50G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=50 status=active |- 0:0:0:0 sda 8:0 active ready running |- 0:0:1:0 sdf 8:80 active ready running |- 1:0:0:0 sdk 8:160 active ready running `- 1:0:1:0 sdp 8:240 active ready running And it's recommended by the manufacturer. >From the StoreServ Management Console "Host:" should be changed to "Generic-ALUA" "Persona 2" "(UARepLun, SESLun, ALUA)". multipath-tools( *upstream* ) is already configured by default to use ALUA with 3PARdata, since c1b7f7f7: https://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=commitdiff;h=c1b7f7f7 Run "multipath -d -v3" to see the config by lun. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
