The status of the RAID of the Cisco FlexFlash becomes unhealthy (has a degraided RAID) when installing a second or switching a SD Card in a Cisco UCS server.

This indicates that the HV partitions are not synchronized.

Here´s the link to this bug:

https://tools.cisco.com/bugsearch/bug/CSCuj14387/?reffering_site=dumpcr

 

You can find further Information regarding the Cisco FlexFlash via following link:

http://www.cisco.com/c/dam/en/us/solutions/collateral/data-center-virtualization/unified-computing/whitepaper_C11-718938.pdf