Dell PowerVault MD1220 Hardware Owner's Manual - Page 15
EMM status LED, enclosure devices. - firmware
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Item Indicator, Button, or Icon Connector 6 Out port link status 7 EMM status LED Description Lights green when all the links out of the port are connected. Lights amber when one or more links out of the port are not connected. The LED remains off if enclosure is not connected. Lights green when the EMM is functioning properly. Lights amber when the enclosure does not boot or is not properly configured. Blinks green (On 250 ms* Off 250 ms) when a firmware download is in progress. Blinks green (On 1000 ms** Off 1000 ms) when a peer auto-update is in progress. Blinks amber (On 250 ms Off 250 ms [two times]; Off 1000 ms) when the enclosure is unable to communicate with enclosure devices. Blinks amber (On 250 ms *Off 250 ms [four times]; Off 1000 ms) when a firmware update fails. Blinks amber (On 250 ms Off 250 ms [five times]; Off 1000 ms) when the firmware versions are different between two EMMs in an enclosure. *indicates that the LED blinks fast. **indicates that the LED blinks slowly. About Your Enclosure 15