Hi Rodney,
Thanks for closing the loop on your problem. Great to hear a SanDisk 4G CF
card fixed the issue.
Though interesting, we default to "libata.dma=3" for both RUNNIX and AstLinux
which should disable DMA for CF devices. Possibly the old CF card incorrectly
looked like a PATA (or some non-CF) device and kicked in DMA.
FYI, if your CF card does support DMA, AstLinux has a custom CLI command
"set-kcmd" to enable DMA for CF, eg. "set-kcmd libata.dma=7"
pbx3 ~ # set-kcmd
--
Usage: set-kcmd option
Available Options:
libata.dma= [LIBATA] DMA control
libata.dma=0 Disable all PATA and SATA DMA
libata.dma=1 PATA and SATA Disk DMA only
libata.dma=2 ATAPI (CDROM) DMA only
libata.dma=4 Compact Flash DMA only
Combinations also work, so libata.dma=3 enables DMA
for disks and CDROMs, but not CFs.
--
This applies to AstLinux and future upgrades, The RUNNIX bootloader always
uses "libata.dma=3" to be safe.
Lonnie
On Mar 8, 2013, at 8:21 AM, Rodney Ross wrote:
> Lonnie,
> Thanks again for the very quick reply - I believe I have tracked down
> the issue. The older CF card I was using does not support DMA mode. By
> pointing me in the correct direction, I was able to see DMA issues on
> startup. Switching to another CF Card SanDisk 4G - UDMA/66 was supported
> and the system booted fine.
> This post http://ubuntuforums.org/showthread.php?t=1396670 gave me the idea
> that changing the .cfg to libata.dma=0 my have also worked by putting the
> controller in PIO mode. If I ever rip apart the other IDS I have I'll try
> that also. But for now a more modern CF card is working fine! Thanks
> again for your efforts.
>
> Rodney
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