[UM-LINUX] DMA not enabled

[Phil Strong]

I recently upgraded my box with a shiny new Seagate SATA (400GB) a new video card, processor, etc basically is all new.

I installed a fresh copy of FC4 and everything seemed to work fine.  Went to play videos and/or DVD's and the video is jumpy/slow.  I did some research and found I should make sure DMA is on for my HD.  It is in fact turned off.

/boot 250mb ext3
/ 10GB ext3
/swap 1GB
/video 3** GB JFS

First I tried to us hdparm -u1 /dev/hda but it tells me it can't enable DMA

I even tried unmounting /dev/hda5 (/video) and just enabling on that but to no avail.

I tried to recompile my kernel to be sure I had SATA support and DMA stuffs but it gives me kernel panic VFS can't load block(0,0).

HELP!

ideas?

--
Phil Strong