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Re: Errors with 8x media, works in other OS

On Sun, 27 Feb 2005, Bill Davidsen wrote:

> That's easy, speed=4 doesn't mean 4x, it means the 4th supported speed
> in the list of capabilities. So:

Yes, I had found that out from other posts on the list.  My
"cryptic" aside was just a commentary on how counter-intuitive
it is.

Also, the numbers just don't match up with the media I have.  I 
had to use trial and error.  The media I burned has:

 Write Speed #0:        8.0x1385=11080KB/s
 Write Speed #1:        6.0x1385=8310KB/s
 Write Speed #2:        4.0x1385=5540KB/s

Or in the speed descriptor section:

 Speed Descriptor#0:    00/1466335 R@6.3x1385=8672KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#1:    00/1466335 R@6.3x1385=8672KB/s W@6.0x1385=8310KB/s
 Speed Descriptor#2:    00/1466335 R@6.3x1385=8672KB/s W@4.0x1385=5540KB/s

In no case should speed=1 match to 4x, or speed=2 match to 6x, unless we 
are counting in speed-order, not listing or number order.  No speed setting 
(or setting speed=3) would then give 8x?  The manual page is not really
helpful on this issue at all.

Does anyone have any idea if there is a patch in the pipeline to correct
this 8x issue if it is ide-scsi at fault?  Is there a work around involving 
using hdparm to set a lower DMA mode?

 -  Pete

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