http://www.thinkwiki.org/wiki/Problems_with_SATA_and_Linux#DVD_drive_not_recognized
says...
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DVD drive not recognized
The ata_piix SATA driver grabs ownership over the IDE ports when it is
loaded, but (by default) does not support PATA ATAPI devices such as the
Ultrabay optical drives. Thus, if the ide driver is compiled as a module
and loaded after ata_piix, the DVD drive will not be recognized by
either driver.
Either of the following configurations will work:
* For kernel 2.6.14 and newer: enable ATAPI support in the SATA system
using libata.atapi_enabled=1 (see below; this is experimental) (note this is
not needed for more recent kernels)
* Compile IDE into the kernel (non-module).
* Compile both IDE and SATA as modules and make sure IDE is loaded first
(the module is called 'ide_generic').
Note that the optical drive must be in the Ultrabay during system boot
(Ultrabay device swapping is currently unsupported).
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Is it likely this is what's happening here?
--
Notebook - Matshita UJ-850 DVD drive not recognised
https://bugs.launchpad.net/bugs/221895
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