Linux 2.4.21-rc5
Quoted 3 lines
Mainly due to a IDE DMA problem which would happen on boxes with lots of RAM, here is -rc5.
Neither -rc5, nor a patch by Ivan, nor both, can get UDMA to turn on automatically at boot time on my machine. This is a 466MHz DS10 Alphaserver, 2GB RAM, ALI 1543 IDE controller that is capable of UDMA2. hdparm can turn on multiword DMA but not UDMA.
Hope this helps,
jasonp