I found the problem the DMA support was activated for both IDE drives the HDD (it's ok) and for /dev/hdc (it's not ok). A
Code Sample
hdparm -d0 /dev/hdc
solved the problem.
But how do I change it in a config file ??
Regards, MarcusWell, congrats on finding the answer. I wouldn't have suspected dma.
You apparently have "dma" in your boot options. I'd remove that and add device-specific command to /opt/bootlocal.sh (and make sure that file is backed up and restored).
Something like this should work:
Code Sample
for DEVICE in hda1 hda2 hdd; do hdparm -d1 /dev/${DEVICE} done
Replace the device names in the first line with your own
original here.
But how do I change it in a config file ??