Messages in this thread |  | | Subject | RE: New model of SanDisk compact flash not working | Date | Tue, 25 Nov 2003 11:46:11 +0200 | From | "gmlinux" <> |
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I seem to have sorted out the problem.
It was definately a dma problem causing the hang, confirmed by Peter Missel, thanks Peter. See the quote below: "DMA not being part of the CF standard yet, SanDisk and IBM are a bit ahead of the game. The problem you're running into is that the vast majority of CF-IDE adapters do not connect the DMA request and grant signals. Hence, the system BIOS and OS drivers see a DMA capable drive on a DMA capable IDE channel, and set things up to use DMA. Instant hang - you know that already."
It seems the adaptor is missing a few hardware lines, confirmed on my side. I can get the drive up with an "ide=nodma".
The drive is still unusable, unable to read or write from it. However, if I "dd" an image from the previous version of drive, in otherwords creating the partition and filesystem etc, the drive seems to work okay. Maybe the default filesystem that comes on the drive was causing some issues.
Other than that I think we will just have to wait for the hardware adaptor to catch up with the flash technology.
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