On Sat, 27 Mar 2004, Rick Jones wrote:
I'm also suffering with this chip, and been lurking on this list for the last week. I don't seem to get any problem writing, only when reading large amounts of data, e.g. a few hundred MB.
I tend to agree that timing is probably the root problem. Whatever, it's perverse.
Reducing max_sectors to 8 should decrease your throughput substantially. It's a good way to test how the interface will behave with less data streaming by.
I read the post about the 64kB limit which seemed to fix it for someone, so I tried patching that in - it made no difference. 32kB made no difference either, I then tried reducing it to 8kB (16 sectors) and it refused to work sensibly at all, gave errors and collapsed trying to read just about anything.
Left me a bit confused, and I abandoned that line of investigation!
I've tried writing a file with FFFF FFFF across the 512-byte boundary, and it's quite happy with that. I haven't tried writing raw to the device, I don't have a spare drive whose data I can trash at the moment. I would have thought a file write should show the same symptom if it's going to be susceptible though, as it's still writing the same data across a boundary.
Still confused ...
Rick Jones
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