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Split Fibre Channel Loop Operation
(Quad Loop)
Note: Quad Loop is only available on JBOD systems
The Altos S700 Series LS module allows for split FC Loop operation,
with two dual fibre channel loops of seven disk drives each. In this split
loop mode the primary port (I/O Slot A) will form a loop using the first
seven drives, 1 to 7 (from right hand side of rackmount systems). The
expansion port (I/O Slot B) will form a second loop using the remaining
7 drives, 8 to 14 (from right hand side of rackmount systems). Default
is Single Loop (no jumper).
Note: If the enclosure has dual LS modules the following
procedures must be applied to both LS modules.
Caution: Enclosures operating in split loop mode can not be daisy
chained to other enclosures.
Setting Up Split Loop Operation
To operate the Altos S700 Series enclosure in split fibre channel loop
mode, follow this procedure:
1
Remove the LS module from the front of the enclosure.
2
On the LS Module locate the jumper position JP3 (Figure 2-1).
3
To operate in split loop mode, install a jumper at JP3.
4
Replace the LS module.
Removing Split Loop Operation
To remove split fibre channel loop operation from the Altos S700 Series
enclosure, follow this procedure:
1
Remove the LS module from the enclosure and locate jumper JP3
(Figure 2-1).
2
To remove split loop operation, remove jumper JP3.
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