The Compact Flash card stores the NOS software and system configuration data. The ECC errors appear to be caused by excessive copy-back operations. Copy-back operations invoke a data write with no error correction. The intent is that errors are corrected on the next read. Multiple operations with no read can accumulate enough errors (>4) that it becomes uncomfortable. This is a known issue with Compact Flash technology.
The unit fails and is found continuously rebooting. Most common is a failure during a firmware upgrade operation, but it has been observed at other times as well. The following error messages may be found in the Console log, which may indicate the issue, however, the only difference between the messages is where the error was encountered:
| SCSI_REQ_SENSE failed cmd 0x03 returned 0x70 0x06 0x28 0x00|
vsmgr: disk xfer failed for IO
NOTE: The commonly seen “Hypervisor Reset Flush” message when seen alone is not indication of any error. However, in conjunction with any of the above errors in the Console log, this indicates the failure.