Find the entry for mpxio-disable and set it to "no" like so:
mpxio-disable="no";
If you are using a third-party storage device then you will also need to edit the file /kernel/drv/scsi_vhci.conf to add an entry for your storage device. Find the entry for device-type-scsi-options-list. To determine what information to enter here you will need to use the format command to do an "inquiry" on the LUN you want to configure for multipathing. Here's an example:
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0
/pci@1c,600000/scsi@2/sd@0,0
1. c2t50060E8006CF6971d0
/pci@1d,700000/fibre-channel@1/fp@0,0/ssd@w50060e8006cf6971,0
Specify disk (enter its number): 1
selecting c2t50060E8006CF6971d0
[disk formatted]
Disk not labeled. Label it now? n
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
! - execute , then return
quit
format>i
Vendor: HITACHI
Product: OPEN-V-CM
Revision: 7002
The information we are interested in is the Vendor and Product. The Vendor must be exactly 8 characters and must be padded if it is less than that. The Product must be 16 characters or less and does not need to be padded. So in this case we would create the following entry:
device-type-scsi-options-list = "HITACHI OPEN-V-CM", "symmetric-option";
Save the file and then execute stmsboot -u, which will update the configuration and reboot the server so the changes can take effect. In my case the command took a few minutes before it rebooted so be patient if it looks like it is hung.
To verify that the multipathing is configured correctly use the luxadm command to show the pathing like so:
# luxadm display /dev/rdsk/c2t50060E8006CF6971d0s2
DEVICE PROPERTIES for disk: /dev/rdsk/c2t50060E8006CF6971d0s2
Vendor: HITACHI
Product ID: OPEN-V-CM
Revision: 7002
Serial Num: 50 0CF690F00
Unformatted capacity: 100.312 MBytes
Write Cache: Enabled
Read Cache: Enabled
Minimum prefetch: 0x0
Maximum prefetch: 0x0
Device Type: Disk device
Path(s):
/dev/rdsk/c2t50060E8006CF6971d0s2
/devices/pci@1d,700000/fibre-channel@1/fp@0,0/ssd@w50060e8006cf6971,0:c,raw
LUN path port WWN: 50060e8006cf6971
Host controller port WWN: 210000e08b920e34
Path status: O.K.
/dev/rdsk/c3t50060E8006CF6915d0s2
/devices/pci@1d,700000/fibre-channel@1,1/fp@0,0/ssd@w50060e8006cf6915,0:c,raw
LUN path port WWN: 50060e8006cf6915
Host controller port WWN: 210100e08bb20e34
Path status: O.K.
We can see that both paths are up and available.
