User's Manual

I/O module status indicators
There are three status indicators on the I/O module. See Figure 7 (page 21). The status indicator
states for an operational I/O module are shown in Table 2 (page 22). Table 3 (page 22) shows
the status indicator states for a non-operational I/O module.
Table 2 Operational I/O module status indicators
DescriptionsLowerPowerUpper
• I/O Module is operational.
OffOnOff
OnFlashing, then OnOn
• Top port—Fibre Channel drive enclosure signal detected.
• Power—Flashes for about 90 seconds after initial power application,
then remains constant.
• Bottom port—Fibre Channel drive enclosure signal detected.
OnOnOn
• Top port—Fibre Channel drive enclosure signal detected.
• Power—Present.
• Bottom port—Fibre Channel drive enclosure signal detected.
• When the locate function is active, all three indicators flash
simultaneously. The Locate function overrides all other indicator
functions. Therefore, an error could be detected while the Locate
function is active and not be indicated until the Locate action terminates.
FlashingFlashingFlashing
Table 3 Non-operational I/O module status indicators
DescriptionsLowerPowerUpper
OffOnOn
• Top port—Fibre Channel drive enclosure signal detected.
• Power—Present.
• Bottom port—No Fibre Channel drive enclosure signal detected. Check
transceiver and fiber cable connections.
NOTE: This status applies to configurations with and without FC loop switches.
OnOnOff
• Top port—No Fibre Channel drive enclosure signal detected. Check transceiver
and fiber cable connections.
• Power—Present.
• Bottom port—Fibre Channel drive enclosure signal detected .
OnOnFlashing
• Top port—EMU detected possible transceiver problem. Check transceiver and
fiber cable connections.
• Power—Present.
• Bottom port—Fibre Channel drive enclosure signal detected .
FlashingOnOn
• Top port—Fibre Channel drive enclosure signal detected.
• Power—Present.
• Bottom port—EMU detected possible transceiver problem. Check transceiver
and fiber cable connections.
NOTE: The EMU will not flash the lower indicator on its own. It will flash only
in response to a locate command. You can flash each of the lights independently
during a locate action.
OffOffOff
• No I/O module power.
• I/O module is nonoperational.
• Check power supplies. If power supplies are operational, replace I/O module.
22 Enterprise Virtual Array hardware components