Lio Jbod Module Configurations; Single Loop (Nonredundant) Operation; Dual Loop Operation; Quad Loop Operation - Adaptec SC4100 - 73GB 10K Rpm U320 SCSI HD User Manual

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
EXP
1 2
Fibre Channel Storage Enclosures (FC4100)
9 10 11
3 4 5
Input Loop in Quad
Loop Configuration
12
Output Loop in Quad
Loop Configuration
6
6-6