Sun Microsystems 6900 Series Benutzerhandbuch

Chapter 2

General Troubleshooting Procedures

Multipathing Options in the Sun
StorEdge 6900 Series

Using the virtualization engines presents several challenges in how multipathing is
handled in the Sun StorEdge 6900 series.

Unlike Sun StorEdge T3+ array and Sun StorEdge network FC switch-8 and switch-
16 switch installations, which present primary and secondary pathing options, the
virtualization engines present only primary pathing options to the data host. The
virtualization engines handle all failover and failback operations and mask those
operations from the multipathing software on the data host.

The following example illustrates a Sun StorEdge Traffic Manager problem on a Sun
StorEdge 6900 series system.

# luxadm display

/dev/rdsk/c6t29000060220041F96257354230303052d0s2

DEVICE PROPERTIES for disk: /dev/rdsk/

c6t29000060220041F96257354230303052d0s2

  Status(Port A):       O.K.

  Status(Port B):       O.K.

  Vendor:               SUN

  Product ID:           SESS01

  WWN(Node):            2a000060220041f4

  WWN(Port A):          2b000060220041f4

  WWN(Port B):          2b000060220041f9

  Revision:             080C

  Serial Num:           Unsupported

  Unformatted capacity: 102400.000 MBytes

  Write Cache:          Enabled

  Read Cache:           Enabled

    Minimum prefetch:   0x0

    Maximum prefetch:   0x0

  Device Type:          Disk device

  Path(s):

  /dev/rdsk/c6t29000060220041F96257354230303052d0s2

  /devices/scsi_vhci/ssd@g29000060220041f96257354230303052:c,raw

   Controller           /devices/pci@6,4000/SUNW,qlc@2/fp@0,0

     Device Address     2b000060220041f4,0

     Class              primary

     State              ONLINE

   Controller           /devices/pci@6,4000/SUNW,qlc@3/fp@0,0

     Device Address     2b000060220041f9,0