2.4.18 beats 2.5.50 in hard drive access????
Quoted 2 lines
Ok that would explain why DMA is off on it. The disk puzzles me - for an OSB4 the code should be selecting MWDMA2
In the BIOS I tried AUTO on all the drives. I have to explicitly enable 32 bit IO in the bios for each drive, it came up default off. I just enabled it because 32 bit IO sounded better, but maybe it's not. I didn't try it with it off. I also tried USER on all the drives where I can then set the IO mode. There were 5 PIO settings possible plus 2 DMA things, which I think were UDMA but I can't recall exactly. On all of those I chose the UDMA2. Otherwise all the settings were identical to what AUTO set them.
Whether AUTO or USER made no difference in performance or in the kernel messages.
I also have multi device support/raid 0/raid 5 enabled. The drives are not partitioned, I use the drive itself in the /dev/md0 array. That's why I get the kernel partition error messages.
I can try some stuff (except a reboot, until Monday). I'm off site now and can't bring the machine down, but harmless experiments are ok, if there is anything you want me to try.
-Dave