hda: dma_intr: status =0x51 { DriveReady SeekComplete Error }
 

hda: dma_intr: status =0x51 { DriveReady SeekComplete Error }
hda: dma_intr: status =0x84 { DriveStatus Error Bad CRC }
I get this error 3 times and after this
hdb: DMA disabled

What is the problem and how can I fix it. I get this message when the kernel boots.

This is the tell-tale sign of a failing drive. It might last another year, month, or nanosecond.

Better save what you can from it, then get a new drive ASAP. Good luck!

I`m not sure that this device is failing. I think this maybe a problem with the compiled kernel image.

your drive and controller aren't getting clean enough
signal for the dma speed the kernel is trying to run.
try a slower dma speed,
like hdparm -d1 -X67 /dev/hdb
you might need to slow down hda also to get it to work.

try hdparm -d1 -X67 /dev/hda /dev/hdb
then speed up each drive 1 spot until it messes up again. you'll find a happy medium.

this doesn't work

neither does this.