Multipath for SAN disks

When multipathing is enabled, each disk should have more than one path enabled and online.


//One of the path is not online.


root@server1 # luxadm display /dev/rdsk/c6t60060480000290102959533030313139d0s2
DEVICE PROPERTIES for disk: /dev/rdsk/c6t60060480000290102959533030313139d0s2
Vendor: EMC
Product ID: SYMMETRIX
Revision: 5772
Serial Num: 102959119000
Unformatted capacity: 4316.250 MBytes
Read Cache: Enabled
Minimum prefetch: 0x0
Maximum prefetch: 0xffff
Device Type: Disk device
Path(s):


/dev/rdsk/c6t60060480000290102959533030313139d0s2
/devices/scsi_vhci/ssd@g60060480000290102959533030313139:c,raw
Controller /devices/pci@1e,600000/SUNW,qlc@2/fp@0,0
Device Address 5006048c52a7abcc,8
Host controller port WWN 210000e08b0ffe6b
Class primary
State OFFLINE
Controller /devices/pci@1e,600000/SUNW,qlc@3/fp@0,0
Device Address 5006048c52a7abc3,8
Host controller port WWN 210000e08b0f6a6a
Class primary
State ONLINE
root@server1 #
root@server1 #


//Check the number of HBA's connnected to the system. Should bemore than 1 to have multipath enabled.


root@server1 # luxadm -e port


Found path to 4 HBA ports


/devices/pci@1e,600000/SUNW,qlc@2/fp@0,0:devctl CONNECTED
/devices/pci@1e,600000/SUNW,qlc@2,1/fp@0,0:devctl NOT CONNECTED
/devices/pci@1e,600000/SUNW,qlc@3/fp@0,0:devctl CONNECTED
/devices/pci@1e,600000/SUNW,qlc@3,1/fp@0,0:devctl NOT CONNECTED
root@server1 #
root@server1 #


//Check the controllers that are connected to SAN


root@server1 # cfgadm -al | grep fabr
c2 fc-fabric connected configured unknown
c4 fc-fabric connected configured unknown
root@server1 #


//Rescan and Configure each controllers


root@server1 # cfgadm -c configure c2 c4
root@server1 #
root@server1 #


//Recreate device create and clean unwanted devices.


root@server1 # devfsadm -C
root@server1 #
root@server1 #


//Check again if both links are online


root@server1 # luxadm display /dev/rdsk/c6t60060480000290102959533030313139d0s2
DEVICE PROPERTIES for disk: /dev/rdsk/c6t60060480000290102959533030313139d0s2
Vendor: EMC
Product ID: SYMMETRIX
Revision: 5772
Serial Num: 102959119000
Unformatted capacity: 4316.250 MBytes
Read Cache: Enabled
Minimum prefetch: 0x0
Maximum prefetch: 0xffff
Device Type: Disk device
Path(s):


/dev/rdsk/c6t60060480000290102959533030313139d0s2
/devices/scsi_vhci/ssd@g60060480000290102959533030313139:c,raw
Controller /devices/pci@1e,600000/SUNW,qlc@2/fp@0,0
Device Address 5006048c52a7abcc,8
Host controller port WWN 210000e08b0ffe6b
Class primary
State ONLINE
Controller /devices/pci@1e,600000/SUNW,qlc@3/fp@0,0
Device Address 5006048c52a7abc3,8
Host controller port WWN 210000e08b0f6a6a
Class primary
State ONLINE


root@server1 #
root@server1 # for disk in /dev/rdsk/c[0-9]*t600*s2; do echo $disk; luxadm display $disk | grep State; done
/dev/rdsk/c6t60060480000290102959533030313139d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030354638d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030354642d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030354645d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363031d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363034d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363037d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363041d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363044d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363130d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363133d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363136d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363139d0s2
State ONLINE
State ONLINE
/dev/rdsk/c6t60060480000290102959533030363143d0s2
State ONLINE
State ONLINE
root@server1 #
root@server1 #