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SubjectRe: 2.1.111: IDE DMA disabled?
   Date: 	Wed, 25 Mar 1998 22:22:18 +0300 (IST)
From: Gadi Oxman <gadio@netvision.net.il>

The configuration on which the filesystem corruption was observed
is a Tyan Tomcat III board + WD 2.2GB drive; that motherboard is
using the 430HX chipset, which pre-dates Ultra-DMA and doesn't
support CRC check.

If it's a WD Caviar of some sort, I see these corruptions too. Every
machine I have ever had the unfortunate luck to have a WD Caviar IDE
disk in, gave me random corruptions with DMA enabled over time.

I think the real solution is a "DMA black list" for certain IDE drive
types and manufacturers.

Later,
David S. Miller
davem@dm.cobaltmicro.com

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