I ran into this issue with my HBA as well; though on FreeNAS. The initial releases of firmware P20 ( Version 20.00.00.00 ) Used on the LSI 2008 / IBM M1015 etc had some bug that caused io errors or media errors. Lots of freenas community chatter on this issue too. LSI released later updates ( Versions 20.00.02.00 and 20.00.04.00 ) that are supposed to fix this bug.