I'm getting loads of the following errors in the syslog, and I have no idea why.

 

Jul 23 18:26:42 unRAID kernel: ata3.00: exception Emask 0x10 SAct 0x0 SErr 0x4890000 action 0xe frozen
Jul 23 18:26:42 unRAID kernel: ata3.00: irq_stat 0x08400040, interface fatal error, connection status changed
Jul 23 18:26:42 unRAID kernel: ata3: SError: { PHYRdyChg 10B8B LinkSeq DevExch }
Jul 23 18:26:42 unRAID kernel: ata3.00: failed command: READ DMA
Jul 23 18:26:42 unRAID kernel: ata3.00: cmd c8/00:f8:90:36:03/00:00:00:00:00/e0 tag 0 dma 126976 in
Jul 23 18:26:42 unRAID kernel: res 50/00:00:8f:36:03/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
Jul 23 18:26:42 unRAID kernel: ata3.00: status: { DRDY }
Jul 23 18:26:42 unRAID kernel: ata3: hard resetting link
Jul 23 18:26:42 unRAID kernel: ata4.00: exception Emask 0x10 SAct 0x0 SErr 0x4890000 action 0xe frozen
Jul 23 18:26:42 unRAID kernel: ata4.00: irq_stat 0x08400040, interface fatal error, connection status changed
Jul 23 18:26:42 unRAID kernel: ata4: SError: { PHYRdyChg 10B8B LinkSeq DevExch }
Jul 23 18:26:42 unRAID kernel: ata4.00: failed command: READ DMA
Jul 23 18:26:42 unRAID kernel: ata4.00: cmd c8/00:90:00:37:03/00:00:00:00:00/e0 tag 0 dma 73728 in
Jul 23 18:26:42 unRAID kernel: res 50/00:00:ff:36:03/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
Jul 23 18:26:42 unRAID kernel: ata4.00: status: { DRDY }
Jul 23 18:26:42 unRAID kernel: ata4: hard resetting link
Jul 23 18:26:48 unRAID kernel: ata4: link is slow to respond, please be patient (ready=0)
Jul 23 18:26:48 unRAID kernel: ata3: link is slow to respond, please be patient (ready=0)
Jul 23 18:26:49 unRAID kernel: ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Jul 23 18:26:49 unRAID kernel: ata4.00: configured for UDMA/100
Jul 23 18:26:49 unRAID kernel: ata4: EH complete

 

I've tried moving disks around, and it's always the same ata3 and ata4 errors. How can I find what these relate to? I have no idea how to find which drives I should be checking.

Attach the entire syslog. zip if needed.