NEC 2500a DMA mode 2?

I just installed my 2500a with my samsung CD-RW drive to the same IDE channel. I set 2500a as master. In windows XP, DMA is enabled but it’s only mode 2, which is the same with my samsung CD-RW. I thought it should be mode 4 otherwise it can’t support 8x DVD-R burning, am I right?

UDMA 2 = ata33 33kbyte/sec
UDMA 4 = ata66 66kbyte/sec
UDMA 5 = ata100 100kbyte/sec
UDMA 6 = ata133 133kbyte/sec

The 2500/2510 are ata33 drives

4x 5.4kbyte/sec
8x 11kbyte/sec
16x 22kbyte/sec

So you see even if you had burner thats rated to 16x UDMA 2 would be fine

As what I know, 8x DVD = 11.08 MB/s

My bad I’m so used to saying kb/sec for file sends I just put it on drive speed too, this is the corrected values. :cool:

UDMA 2 = ata33 33_Mbyte/sec
UDMA 4 = ata66 66_Mbyte/sec
UDMA 5 = ata100 100_Mbyte/sec
UDMA 6 = ata133 133_Mbyte/sec

The 2500/2510 are ata33 drives

4x 5.4_Mbyte/sec
8x 10.8_Mbyte/sec
16x 21.6_Mbyte/sec

So you see even if you had burner thats rated to 16x UDMA 2 would be fine