Adaptec FS4500 User Guide - Page 61

LIO JBOD Module Configurations, Single Loop (Nonredundant) Operation, Dual Loop Operation

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Fibre Channel Storage Enclosures (FC4100) LIO JBOD Module Configurations This section describes the FC configurations supported by your Adaptec FC Storage Enclosure. Note: All FC enclosures require the use of an appropriate SFP transducer (copper or optical). Single Loop (Nonredundant) Operation One LIO and the ES module are used for single, nonredundant, FC loop operation. A blank panel is used in the second LIO module slot to maintain proper airflow and cooling. In this configuration, the LIO module is installed in I/O Option Slot 1 (the slot on the right.) Dual Loop Operation Two LIO modules are used for dual FC loop operations. Dual FC loops allow for a redundant data path to the dual port disk drives. In dual loop operation, both loops flow in the same direction with the second LIO module loop direction the same as the first. Quad Loop Operation The LIO module allows for operation in a quad loop mode. In this mode, the Input port forms a loop using drives 12 through 7. The Output port will form a loop using drives 1 through 6. This mode is initiated by setting a switch in location S1 on an LIO. PRIM 7 8 9 10 11 12 Input Loop in Quad Loop Configuration EXP 1 234 56 Output Loop in Quad Loop Configuration 6-6

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6-6
Fibre Channel Storage Enclosures (FC4100)
LIO JBOD Module Configurations
This section describes the FC configurations supported by your
Adaptec FC Storage Enclosure.
Note:
All FC enclosures require the use of an appropriate SFP
transducer (copper or optical).
Single Loop (Nonredundant) Operation
One LIO and the ES module are used for single, nonredundant, FC
loop operation. A blank panel is used in the second LIO module
slot to maintain proper airflow and cooling. In this configuration,
the LIO module is installed in I/O Option Slot 1 (the slot on the
right.)
Dual Loop Operation
Two LIO modules are used for dual FC loop operations. Dual FC
loops allow for a redundant data path to the dual port disk drives.
In dual loop operation, both loops flow in the same direction with
the second LIO module loop direction the same as the first.
Quad Loop Operation
The LIO module allows for operation in a quad loop mode. In this
mode, the Input port forms a loop using drives 12 through 7. The
Output port will form a loop using drives 1 through 6. This mode is
initiated by setting a switch in location S1 on an LIO.
PRIM
EXP
1
2
3
4
5
6
12
11
10
9
8
7
Input Loop in Quad
Loop Configuration
Output Loop in Quad
Loop Configuration