Led Indicators - Sun Microsystems StorEdge A7000 Service Manual

3.3.2

LED Indicators

The front panel has 15 LED indicators; see
LEDs (MEZREG to ERROR) indicate EDRAM status; the next nine LEDs indicate
MCA status. Two LEDs at the top edge of the MCA indicate arbiter status and are
described at the end of the table.
TABLE 3-4
LED
MEZREG
LOCREQ
VMEREQ
LOCAL
VME
ERROR
ARBEN
ONLIN
MCTX
DMATX
STALL
GBSY
NBUSY
TXHALT
Cache Memory Card LED Indicators
When Lighted, Indicates...
Memory is servicing a request from the Mezzanine port
Memory is servicing a local bus port request
Memory is servicing a VMEbus port request
The local bus interface is software enabled
The VMEbus interface is software enabled
One of the following EDRAM card errors has occurred:
• Local bus address parity error
• Local bus control parity error
• Local bus data bus parity error
• VMEbus interface internal bus parity error
• Mezzanine interface internal bus parity error
• Memory read multibit error
This MCA is the active bus arbiter for this MC bus, controlling the
arbitration logic (refer to switch S2,
Cache is online; MCA can transmit/receive MC bus data
The MCA is sending single-word snoop transfers to the MC bus
Indicates a DMA read; the MCA is sending DMA transfers to the
MC bus
The MCA will not allow the EDRAM card to accept VME/local bus
write transfers; usually because MCA transmit FIFO is full
The Global receive FIFO is full or busy
The MCA Local receive FIFO is full or busy
A transmit halt on error condition
and
FIGURE 3-6 TABLE 3-4
FIGURE 3-5
Chapter 3 Card Configuration Information
. The first six
)
3-13