Table of Contents
SAN / SAN LUN information
List the multipathing support
mpathadm list mpath-support mpath-support: libmpscsi_vhci.so
Choose the mpath support name from the output list
List the multipathing support properties
mpathadm show mpath-support libmpscsi_vhci.so
mpath-support: libmpscsi_vhci.so
Vendor: Sun Microsystems
Driver Name: scsi_vhci
Default Load Balance: round-robin
Supported Load Balance Types:
round-robin
logical-block
Allows To Activate Target Port Group Access: yes
Allows Path Override: no
Supported Auto Failback Config: 1
Auto Failback: on
Failback Polling Rate (current/max): 0/0
Supported Auto Probing Config: 0
Auto Probing: NA
Probing Polling Rate (current/max): NA/NA
Supported Devices:
Vendor: SUN
Product: T300
Revision:
Supported Load Balance Types:
round-robin
....
....
To Get a List of Logical Units Discovered on the System
mpathadm list lu
/dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
Total Path Count: 4
Operational Path Count: 4
/dev/rdsk/c4t600A0B8000505B5000000D2F4C10C3EDd0s2
Total Path Count: 4
Operational Path Count: 4
/dev/rdsk/c4t600A0B8000505B5000000D2D4C10C34Dd0s2
Total Path Count: 4
Operational Path Count: 4
Select a logical unit name from the output.
mpathadm show lu /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
Logical Unit: /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
mpath-support: libmpscsi_vhci.so
Vendor: IBM
Product: 1814 FAStT
Revision: 0916
Name Type: unknown type
Name: 600a0b8000505b5000000d304c10c46d
Asymmetric: yes
Current Load Balance: round-robin
Logical Unit Group ID: NA
Auto Failback: on
Auto Probing: NA
Paths:
Initiator Port Name: 210000e08b945795
Target Port Name: 200500a0b8505d67
Override Path: NA
Path State: OK
Disabled: no
Initiator Port Name: 210000e08b945795
Target Port Name: 200400a0b8505d67
Override Path: NA
Path State: OK
Disabled: no
Initiator Port Name: 210000e08b94ec9a
Target Port Name: 200500a0b8505d68
Override Path: NA
Path State: OK
Disabled: no
Initiator Port Name: 210000e08b94ec9a
Target Port Name: 200400a0b8505d68
Override Path: NA
Path State: OK
Disabled: no
Target Port Groups:
ID: 1
Explicit Failover: yes
Access State: standby
Target Ports:
Name: 200500a0b8505d67
Relative ID: 0
Name: 200500a0b8505d68
Relative ID: 0
ID: 2
Explicit Failover: yes
Access State: active
Target Ports:
Name: 200400a0b8505d67
Relative ID: 0
Name: 200400a0b8505d68
Relative ID: 0
Fail Over a Logical Unit
This operation is applicable only to devices in the following two categories:
- Unordered List ItemAsymmetric devices with a proprietary failover mechanism recognized and supported by multipathing support
- Unordered List ItemDevices conforming to the T10 Standard Target Port Group Support libmpscsi_vhci.so and providing explicit mode asymmetric logical unit access
mpathadm show lu <logical-unit-name command>
Example:
Logical Unit: /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
mpath-support: libmpscsi_vhci.so
Vendor: IBM
Product: 1814 FAStT
Revision: 0916
Name Type: unknown type
Name: 600a0b8000505b5000000d304c10c46d
Asymmetric: yes
….
….
ID: 1
Explicit Failover: yes
Access State: standby
Target Ports:
Name: 200500a0b8505d67
Relative ID: 0
Name: 200500a0b8505d68
Relative ID: 0
ID: 2
Explicit Failover: yes
Access State: active
Target Ports:
Name: 200400a0b8505d67
Relative ID: 0
Name: 200400a0b8505d68
Relative ID: 0
mpathadm failover lu <logical-unit-name command>
Example:
mpathadm failover lu /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
verify the access state change
mpathadm show lu logical-unit-name
….
….
Target Port Groups:
ID: 1
Explicit Failover: yes
Access State: active
Target Ports:
Name: 200500a0b8505d67
Relative ID: 0
Name: 200500a0b8505d68
Relative ID: 0
ID: 2
Explicit Failover: yes
Access State: standby
Target Ports:
Name: 200400a0b8505d67
Relative ID: 0
Name: 200400a0b8505d68
Relative ID: 0
Verify the access state change with luxadm
luxadm display /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
DEVICE PROPERTIES for disk: /dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
Vendor: IBM
Product ID: 1814 FAStT
Revision: 0916
Serial Num: SK82800386
Unformatted capacity: 61440,000 MBytes
Write Cache: Enabled
Read Cache: Enabled
Minimum prefetch: 0xffff
Maximum prefetch: 0x0
Device Type: Disk device
Path(s):
/dev/rdsk/c4t600A0B8000505B5000000D304C10C46Dd0s2
/devices/scsi_vhci/ssd@g600a0b8000505b5000000d304c10c46d:c,raw
Controller /devices/pci@7c0/pci@0/pci@9/SUNW,qlc@0/fp@0,0
Device Address 200500a0b8505d67,3
Host controller port WWN 210000e08b945795
Class primary
State ONLINE
Controller /devices/pci@7c0/pci@0/pci@9/SUNW,qlc@0/fp@0,0
Device Address 200400a0b8505d67,3
Host controller port WWN 210000e08b945795
Class secondary
State STANDBY
Controller /devices/pci@7c0/pci@0/pci@8/SUNW,qlc@0/fp@0,0
Device Address 200500a0b8505d68,3
Host controller port WWN 210000e08b94ec9a
Class primary
State ONLINE
Controller /devices/pci@7c0/pci@0/pci@8/SUNW,qlc@0/fp@0,0
Device Address 200400a0b8505d68,3
Host controller port WWN 210000e08b94ec9a
Class secondary
State STANDBY
Luxadm port information
luxadm -e port /devices/pci@7c0/pci@0/pci@8/SUNW,qlc@0/fp@0,0:devctl CONNECTED /devices/pci@7c0/pci@0/pci@9/SUNW,qlc@0/fp@0,0:devctl CONNECTED
Luxadm dump map information
luxadm -e dump_map /devices/pci@7c0/pci@0/pci@9/SUNW,qlc@0/fp@0,0:devctl Pos Port_ID Hard_Addr Port WWN Node WWN Type\\ 0 10100 0 202900a0b82acd3c 200800a0b82acd3c 0x0 (Disk device) 1 10200 0 210000e08b94d494 200000e08b94d494 0x1f (Unknown Type,Host Bus Adapter)
devices = output from luxadm -e port
wwn information from prtconf
prtconf -vp |grep -i wwn port-wwn: 210000e0.8b899dec node-wwn: 200000e0.8b899dec port-wwn: 210000e0.8b94d494 node-wwn: 200000e0.8b94d494
http://download.oracle.com/docs/cd/E19253-01/820-1931/agkax/index.html
