[SunHELP] MPxIO vs EMC Powerpath

[Richie]

I am performing fresh install of Solaris on old hardware.  Running 
Solaris 10 update 10 + 09/20/12 Solaris 10 Recommended.  Host is SunFire 
4800 attached to CX300 and has 3 raids pointed at it.

I installed EMC Powerpath like always, but after a reboot I took note of 
a message in the kernel logs.  No manual changes were made.
Sep 26 14:42:13 sf4800 PowerPath: [ID 702911 daemon.notice] MPxIO is 
enabled for clariion storage arrays, switching off PowerPath path 
management for clariion.

This is telling me that MPxIO is enabled but `format` output should 
probably only list one path right?  Maybe it's not fully enabled?  I am 
not familiar with MPxIO, but I'm willing to give MPxIO a go if there's 
no real reason to use Powerpath over it.

Note: All of our dev systems are using ZFS now so technically this will 
only be useful on the SAN luns that are still using UFS.

This is reordered the output of `format` command, I put them into groups 
because there is a second path of type unknown (which is also reported 
offline in dmesg)
AVAILABLE DISK SELECTIONS:
        0. c0t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
           /ssm at 0,0/pci at 18,600000/pci at 1/scsi at 2/sd at 0,0
        4. c2t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
           /ssm at 0,0/pci at 1c,600000/pci at 1/scsi at 2/sd at 0,0

        3. c1t500601691020A09Ed2 <DGC-RAID5-0219 cyl 51198 alt 2 hd 256 
sec 16>
/ssm at 0,0/pci at 19,600000/fibre-channel at 1/fp at 0,0/ssd at w500601691020a09e,2
        7. c3t500601611020A09Ed2 <drive type unknown>
/ssm at 0,0/pci at 1d,600000/fibre-channel at 1/fp at 0,0/ssd at w500601611020a09e,2

        5. c3t500601611020A09Ed0 <DGC-RAID5-0207 cyl 65533 alt 2 hd 128 
sec 134>
/ssm at 0,0/pci at 1d,600000/fibre-channel at 1/fp at 0,0/ssd at w500601611020a09e,0
        1. c1t500601691020A09Ed0 <drive type unknown>
/ssm at 0,0/pci at 19,600000/fibre-channel at 1/fp at 0,0/ssd at w500601691020a09e,0

        6. c3t500601611020A09Ed1 <DGC-RAID5-0219 cyl 65533 alt 2 hd 8 
sec 2147>
/ssm at 0,0/pci at 1d,600000/fibre-channel at 1/fp at 0,0/ssd at w500601611020a09e,1
        2. c1t500601691020A09Ed1 <drive type unknown>
/ssm at 0,0/pci at 19,600000/fibre-channel at 1/fp at 0,0/ssd at w500601691020a09e,1


# grep '^mpxio-disable' /kernel/drv/*
/kernel/drv/fp.conf:mpxio-disable="yes";
/kernel/drv/iscsi.conf:mpxio-disable="no";
/kernel/drv/mpt.conf:mpxio-disable="yes";
/kernel/drv/mpt_sas.conf:mpxio-disable="no";


TIA for any information.