Both hard disk fault at same time [closed]

Today one of the my computers have strange log.

At 8:00 both hard disks start to have errors like this:

Feb  9 07:24:48 bill2 kernel: ad4: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=62726607            
Feb  9 07:24:48 bill2 kernel: ad6: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=62726607            
Feb  9 07:25:46 bill2 kernel: ad6: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=62726191            
Feb  9 07:48:06 bill2 smartd[1526]: Device: /dev/ad4, ATA error count increased from 1 to 2                       
Feb  9 07:48:08 bill2 smartd[1526]: Device: /dev/ad6, ATA error count increased from 1 to 3 

Full log file, smartctl output and other data I uploaded to gist. Here is a link: https://gist.github.com/korjavin/4745963

My question is: may i believe that two hard disk , without error , suddenly get problem in one day / one hour? Or I should find other reason of this? How?

WRITE_DMA UDMA ICRC error is a detected transmission error which occurred on a WRITE_DMA command.

I am not too familiar with FreeBSD, but this seems to be an often-documented issue with FreeBSD machines using certain controller types:

https://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting

Also, a hardware failure of the controller or broken cabling is to be considered as the possible cause of the fault.