UltraDMA CRC Error Count S.M.A.R.T. parameter indicates the total quantity of CRC errors during UltraDMA mode. The raw value of this attribute. hi i unable to reactivate my array.. or get the Faulty X off my one drive..is there a command to reforce it to reset.. it did a UDMA CRC. Sometimes a computer hard drive will fail with a CRC Error, often during data CRC checksums are also used to detect any errors during an Ultra-DMA data.