Problem Statement: 

	The frad daemon reports "Ignoring CRC error" on DIMM replacement.

Symptoms:

See error log in /var/opt/SUNWSMS/SMS1.2/adm/platform.

Every four hours, a record of powered-on components is written to the SEEPROM.

You may see hourly errors describing "Ignoring CRC error on DIMM with known bad CRC on DIMM". 
         

Troubleshooting:

If you have one of the older DIMMS (for example, part number 501-5401-01 DIMM )
that has the older CRCs in the SEEPROM, you may see platform error messages similar to
those shown below:
 
***** in file /var/opt/SUNWSMS/SMS1.2/adm/platform  
  
   Jul 25 10:14:29 2002 Q8SJ3 frad[442]: [9926 594352968222058 NOTICE SeepromInfoPro.cc 2715]
   Ignoring CRC error on DIMM with known bad CRC on DIMM at SB9/P1/B0/D3 
   
   Jul 25 11:14:13 2002 Q8SJ3 frad[442]: [9926 597937432405436 NOTICE SeepromInfoPro.cc 2715] 
   Ignoring CRC error on DIMM with known bad CRC on DIMM at SB9/P1/B0/D3 
    
   Jul 25 12:14:22 2002 Q8SJ3 frad[442]: [9926 601545906798911 NOTICE SeepromInfoPro.cc 2715] 
   Ignoring CRC error on DIMM with known bad CRC on DIMM at SB9/P1/B0/D3 
    
   Jul 25 13:14:13 2002 Q8SJ3 frad[442]: [9926 605136625163401 NOTICE SeepromInfoPro.cc 2715]
   Ignoring CRC error on DIMM with known bad CRC on DIMM at SB9/P1/B0/D3 
	
Technically, there is a problem with the DIMM.  The SEEPROM on SB9/P1/B0/D3 has a
corrupt entry/segment. However, this is NOT an error in the memory area used by
the domain. That's why you're not seeing CE ECCs or Rstops from the domain side.

- Resolution:

To have the error messages cease, the DIMM must be replaced.  However, because
it has no impact on the health or operation of the domain, it can be done at
the next scheduled maintenance window. You do not need to schedule a maintenance 
window for the sole purpose of replacing this DIMM.

- Summary of part number and patch ID's 

	None
	
- References and bug IDs

	None 

- Additional background information:

	None

- MetaData/Problem categorization:

Product/Platform: SF12K/SF15K	
Category: 

- Keywords

frad CRC DIMM