Mylex DAC960PG, Installation Manual

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Connectors and Jumpers
3-8 DAC960PG Installation Guide
External LED Connector
Figure 3-2. Pinout of Connector J4
Table 3-2. Status LED Indicators (from JP4)
,
WARNING
DATA WILL BE LOST if the system either loses
power or is reset while the Cache Dirty LED is ON
(indicating the cache contains data not yet written
to the disk). To prevent data loss, install the
optional intelligent cache battery backup module
(IBBU).
Connector Indicator Meaning if ON
JP4, Pin 2 SCSI Activity One or more of the SCSI channels on the
controller is transmitting or receiving data.
JP4, Pin 6 Cache Dirty
(Write Pending) The cache memory on the DAC960PG
contains data that is more current than the data
on the hard drive(s).