Disk replacement isn't multipath

Question

I replaced a failed disk on our 11.2 install with the exact same, however where the old disk had two path, the new disk only has one!  All other disks in this shelf are showing 2 paths.  Any idea where to look?  Even when I plug the old disk back in I have two paths.
Old disk:
/scsi_vhci/disk@g5000c5005857b423 (sd33) multipath status: optimal: path 8 mpt_sas5/disk@w5000c5005857b422,0 is online: Load balancing: round-robin
new disk (same port):
/scsi_vhci/disk@g5000c50058557efb (sd71) multipath status: degraded: path 114 mpt_sas5/disk@w5000c50058557efa,0 is online
Single Pathed:
# mpathadm show lu /dev/rdsk/c0t5000C50058557EFBd0s2
Logical Unit:  /dev/rdsk/c0t5000C50058557EFBd0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SEAGATE
        Product:  ST3000NM0043
        Revision:  0004
        Name Type:  unknown type
        Name:  5000c50058557efb
        Asymmetric:  no
        Current Load Balance:  round-robin
        Logical Unit Group ID:  NA
        Auto Failback:  on
        Auto Probing:  NA
        Paths:
                Initiator Port Name:  w50030480070a8b02
                Target Port Name:  w5000c50058557efa
                Override Path:  NA
                Path State:  OK
                Disabled:  no
        Target Ports:
                Name:  w5000c50058557efa
                Relative ID:  0
Working disk:
# mpathadm show lu /dev/rdsk/c0t5000C5005857A7D3d0s2
Logical Unit:  /dev/rdsk/c0t5000C5005857A7D3d0s2
        mpath-support:  libmpscsi_vhci.so
        Vendor:  SEAGATE
        Product:  ST3000NM0043
        Revision:  0004
        Name Type:  unknown type
        Name:  5000c5005857a7d3
        Asymmetric:  no
        Current Load Balance:  round-robin
        Logical Unit Group ID:  NA
        Auto Failback:  on
        Auto Probing:  NA
        Paths:
                Initiator Port Name:  w50030480070a8b02
                Target Port Name:  w5000c5005857a7d1
                Override Path:  NA
                Path State:  OK
                Disabled:  no
                Initiator Port Name:  w50030480070a8b02
                Target Port Name:  w5000c5005857a7d2
                Override Path:  NA
                Path State:  OK
                Disabled:  no
        Target Ports:
                Name:  w5000c5005857a7d1
                Relative ID:  0
                Name:  w5000c5005857a7d2
                Relative ID:  0

Answer 1

Sorry, I'm somewhat confused as I never used 10.1.5. You have Disk Utility but to Repair the Disk you need to boot to the cd, correct?
I know that 10.1.5 needs the Repair Priveledges Utility to Repair Privledges (Repair Permissions). This may help, I'm not sure.
I would try Repairing the Disk from the install cd as I mentioned above and then restart and then Repair Priveledges from the Repair Privledges Utility. If you have not downloaded it already see below for download.
You can find it at:
http://docs.info.apple.com/article.html?artnum=106900
Read all the documentation before proceeding.
That's all I can think of that might help,
littleshoulders [:-)