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Difference between old DMA and UDMA?[edit]

What's the difference between WDMA and UDMA signaling apart from the speed? Or is it ONLY the speed? -- (talk) 10:27, 12 March 2011 (UTC)

What about UDMA 7?[edit]

In this other article it is said that "CompactFlash Revision 6.0 (November 2010) added UltraDMA Mode 7 (167 Mbyte/s), ATA-8/ACS-2 sanitize command, TRIM and an optional card capability to report the operating temperature range of the card.[32]". While UDMA 7 CompactFlash cards are already on the market, this article doesn't tell anything about it. Update needed? — Preceding unsigned comment added by (talk) 05:45, 21 July 2012 (UTC)