can find no problem with either drive. I disable dma as a temporary solution, but I think it is not a drive fault in my case. Do back up :)
How did you go about disabling dma?
You only want to do that as a last resort, it makes your disk IO very slow.
You would change it using hdparm ... the option would be:
hdparm -d0
You can make it happen every reboot by editing the file:
/etc/sysconfig/harddisks
set:
USE_DMA=0
and remove the # in front of it.
AGAIN ... only if absolutely necessary, because it greatly slows down disk I/O.
I used ide=nodma as a kernel option in grub I don't generally do much at the moment that requires high I/O, though I would like to fix this. I will try changing cables.
Without dma: # hdparm -Tt /dev/hda
/dev/hda: Timing cached reads: 700 MB in 2.01 seconds = 348.48 MB/sec Timing buffered disk reads: 12 MB in 3.69 seconds = 3.25 MB/sec
With dma: # hdparm -Tt /dev/hda
/dev/hda: Timing cached reads: 688 MB in 2.01 seconds = 342.34 MB/sec Timing buffered disk reads: 28 MB in 3.09 seconds = 9.05 MB/sec