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Full Discussion: FC Luns rescan issue
Operating Systems Linux Red Hat FC Luns rescan issue Post 302950996 by sumit6in on Friday 31st of July 2015 02:18:08 AM
Old 07-31-2015
Hi Scrutinizer

I'm not sure its multipath issue or not as multipath.conf for cluster is same for both nodes and multipath -ll not showing disk for this rac server as lsscsi not showing disk. I have reload multipath as well.

Multipath -ll
Code:
mpath38 (36005076304ffd7430000000000003107) dm-24 IBM,2107900
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:13 sdap 66:144 [active][ready] 
 \_ 3:0:2:13 sdo  8:224  [active][ready] 
mpath72 (36005076304ffd7430000000000001400) dm-31 IBM,2107900
[size=68G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:20 sdaw 67:0   [active][ready] 
 \_ 3:0:2:20 sdv  65:80  [active][ready] 
mpath37 (36005076304ffd7430000000000003106) dm-23 IBM,2107900
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:12 sdao 66:128 [active][ready] 
 \_ 3:0:2:12 sdn  8:208  [active][ready] 
mpath69 (36005076304ffd7430000000000002354) dm-28 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:17 sdat 66:208 [active][ready] 
 \_ 3:0:2:17 sds  65:32  [active][ready] 
mpath71 (36005076304ffd7430000000000002254) dm-30 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:19 sdav 66:240 [active][ready] 
 \_ 3:0:2:19 sdu  65:64  [active][ready] 
mpath36 (36005076304ffd7430000000000003105) dm-22 IBM,2107900
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:11 sdan 66:112 [active][ready] 
 \_ 3:0:2:11 sdm  8:192  [active][ready] 
mpath68 (36005076304ffd7430000000000002210) dm-27 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:16 sdas 66:192 [active][ready] 
 \_ 3:0:2:16 sdr  65:16  [active][ready] 
mpath70 (36005076304ffd7430000000000002355) dm-29 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:18 sdau 66:224 [active][ready] 
 \_ 3:0:2:18 sdt  65:48  [active][ready] 
mpath35 (36005076304ffd7430000000000003104) dm-21 IBM,2107900
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:10 sdam 66:96  [active][ready] 
 \_ 3:0:2:10 sdl  8:176  [active][ready] 
mpath67 (36005076304ffd7430000000000002485) dm-26 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:15 sdar 66:176 [active][ready] 
 \_ 3:0:2:15 sdq  65:0   [active][ready] 
mpath66 (36005076304ffd74300000000000021b4) dm-20 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:9  sdal 66:80  [active][ready] 
 \_ 3:0:2:9  sdk  8:160  [active][ready] 
mpath65 (36005076304ffd743000000000000206f) dm-19 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:8  sdak 66:64  [active][ready] 
 \_ 3:0:2:8  sdj  8:144  [active][ready] 
mpath64 (36005076304ffd7430000000000002070) dm-18 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:7  sdaj 66:48  [active][ready] 
 \_ 3:0:2:7  sdi  8:128  [active][ready] 
mpath63 (36005076304ffd7430000000000002170) dm-17 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:6  sdai 66:32  [active][ready] 
 \_ 3:0:2:6  sdh  8:112  [active][ready] 
mpath78 (36005076304ffd743000000000000207d) dm-10 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 3:0:2:26 sdab 65:176 [active][ready] 
 \_ 4:0:2:26 sdbc 67:96  [active][ready] 
mpath62 (36005076304ffd743000000000000216f) dm-16 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:5  sdah 66:16  [active][ready] 
 \_ 3:0:2:5  sdg  8:96   [active][ready] 
mpath77 (36005076304ffd7430000000000002038) dm-9 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 3:0:2:25 sdaa 65:160 [active][ready] 
 \_ 4:0:2:25 sdbb 67:80  [active][ready] 
mpath59 (36005076304ffd743000000000000212b) dm-13 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:2  sdae 65:224 [active][ready] 
 \_ 3:0:2:2  sdd  8:48   [active][ready] 
mpath76 (36005076304ffd7430000000000002039) dm-35 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:24 sdba 67:64  [active][ready] 
 \_ 3:0:2:24 sdz  65:144 [active][ready] 
mpath61 (36005076304ffd743000000000000202a) dm-15 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:4  sdag 66:0   [active][ready] 
 \_ 3:0:2:4  sdf  8:80   [active][ready] 
mpath58 (36005076304ffd743000000000000212a) dm-12 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:1  sdad 65:208 [active][ready] 
 \_ 3:0:2:1  sdc  8:32   [active][ready] 
mpath75 (36005076304ffd743000000000000274a) dm-34 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:23 sdaz 67:48  [active][ready] 
 \_ 3:0:2:23 sdy  65:128 [active][ready] 
mpath60 (36005076304ffd743000000000000202b) dm-14 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:3  sdaf 65:240 [active][ready] 
 \_ 3:0:2:3  sde  8:64   [active][ready] 
mpath74 (36005076304ffd7430000000000001402) dm-33 IBM,2107900
[size=68G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:22 sday 67:32  [active][ready] 
 \_ 3:0:2:22 sdx  65:112 [active][ready] 
mpath39 (36005076304ffd7430000000000003108) dm-25 IBM,2107900
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:14 sdaq 66:160 [active][ready] 
 \_ 3:0:2:14 sdp  8:240  [active][ready] 
mpath56 (36005076304ffd7430000000000002723) dm-11 IBM,2107900
[size=136G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:0  sdac 65:192 [active][ready] 
 \_ 3:0:2:0  sdb  8:16   [active][ready] 
mpath73 (36005076304ffd7430000000000001401) dm-32 IBM,2107900
[size=68G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
 \_ 4:0:2:21 sdax 67:16  [active][ready] 
 \_ 3:0:2:21 sdw  65:96  [active][ready]

multipath.conf -
Code:
# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices. 
#blacklist {
        #devnode "*"
	#}

blacklist {
        device {
                vendor "IBM"
                product "*"
        }
}
######

blacklist_exceptions {
        device {
                vendor "IBM"
                product "2107900"
        }
}



#blacklist {
#		device {
#		vendor	"IBM"
#		product "*" 
#	}
#}
## By default, devices with vendor = "IBM" and product = "S/390.*" are
## blacklisted. To enable mulitpathing on these devies, uncomment the
## following lines.
#blacklist_exceptions {
#	device {
#		vendor	"IBM"
#		product	"2107900"
#	}
#}

## Use user friendly names, instead of using WWIDs as names.
defaults {
	user_friendly_names yes
       # path_grouping_policy    multibus
}
##
## Here is an example of how to configure some standard options.
##
#
##
## The wwid line in the following blacklist section is shown as an example
## of how to blacklist devices by wwid.  The 2 devnode lines are the
## compiled in default blacklist. If you want to blacklist entire types
## of devices, such as all scsi devices, you should use a devnode line.
## However, if you want to blacklist specific devices, you should use
## a wwid line.  Since there is no guarantee that a specific device will
## not change names on reboot (from /dev/sda to /dev/sdb for example)
## devnode lines are not recommended for blacklisting specific devices.
##


#blacklist {
#       wwid 26353900f02796769
#	devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
#	devnode "^hd[a-z]"
# devnode "^hd[a-z][[0-9]*]"
#        devnode "^vd[a-z]"
#        devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
#
#}


#multipaths {
#	multipath {
#		wwid			3600508b4000156d700012000000b0000
#		alias			yellow
#		path_grouping_policy	multibus
#		path_checker		readsector0
#		path_selector		"round-robin 0"
#		failback		manual #		rr_weight		priorities #		no_path_retry		5
#	}
#	multipath {
#		wwid			1DEC_____321816758474
#		alias			red
#	}
#}
devices {
device {
               vendor                  "IBM"
                product                 "2107900"
		getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
		features		"1 queue_if_no_path"
		hardware_handler	"0"
       	        path_grouping_policy    multibus
		rr_weight		uniform
		rr_min_io		1000
		path_checker		tur
       }
}

 

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