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16 Sun StorEdge 3900 and 6900 2.0 Series Troubleshooting Guide • March 2003
Sun Proprietary/Confidential: Internal Use Only
Multipathing Options in the Sun
StorEdge 6900 Series
The presence of the virtualization engine makes multipathing in a Sun StorEdge
6900 series environment challenging.
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 (MPxIO) software
problem on a Sun StorEdge 6900 series system.
# /usr/sbin/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
Class primary
State ONLINE