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Chapter 2 General Troubleshooting Procedures 13
Sun Proprietary/Confidential: Internal Use Only
FIGURE 2-3 Primary Data Paths to the Master Sun StorEdge T3+ Array
To access the LUN on the alternate master, the Sun StorEdge T3+ array I/O could
travel:
■ From HBA-0 -> switch -> virtualization engine(1) -> switch -> alternate master
controller (primary route from HBA-0)
■ From HBA-0 -> switch -> virtualization engine(1) -> switch -> switch -> master
controller -> backend loop to alternate master (secondary route from HBA-0)
■ From HBA-1 -> switch -> virtualization engine(2) -> switch -> switch -> alternate
master controller (primary route from HBA-1)
■ From HBA-1 -> switch -> virtualization engine(2) -> switch -> master controller -
> backend loop to alternate master (secondary route from HBA-1)
Host with HBA-0 and HBA-1
LUN0 - 10G
Active-MPDrive0
LUN1 - 10G
Active-MPDrive1
Switch
Virtualization
Engine (2)
Switch
LUN0 - 500G
Active-Master
LUN1 - 500G
Passive -
Alternate Master
Logical Multipath Drive
MPDrive 0
Logical Multipath Drive
MPDrive 1
T3ES
(Master)
(0A - 1P)
(Alternate Master)
(1A - 0P)
LUN0 - 10G
Active-MPDrive0
LUN1 - 10G
Active-MPDrive1
Switch
Virtualization
Engine (1)
Storage I/O and
Virtualization Engine Communications Traffic
SAN
Database
MPDrive
Carved LUNs
Masking
LUN0 - 500G
Passive - Master
LUN1 - 500G
Active -
Alternate Master
Switch