Sun Microsystems StorEdge T3+, Service Manual

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Chapter 8 Diagnosing and Correcting FC-AL Loop Problems 8-3
FIGURE 8-1
contains a block diagram showing the two back-end drive loops in a
normal (no failures) configuration.
FIGURE 8-1
Backend Loop Configuration
Standard mirrored loop
configuration
Loop 1
Path 0
Interconnect card Loop 2
Path 1
Interconnect card
Nonsplit loop
Normal:
Non-split configuration drives
u1d4-9 and u2d4-9 are logically
configured to loop 1 (path 0)
Interconnect card
Loop 1
Path 0
Alternate u2
Nonsplit loop
Normal:
Nonsplit configuration drives
u1d1-3 and u2d1-3 are logically
configured to loop 2 (path 1)
Interconnect card
Loop 2
Path 1
Loop
cables
Mirrored cache data also
transverses loop 2 (path 1)
as well
Master, u1