Messages in this thread | | | Subject | Inquiry data and emulated SG devices | From | Mathieu Fluhr <> | Date | Mon, 15 Oct 2007 18:02:11 +0200 |
| |
Hello all,
First of all, let me introduce myself a little bit. I am the responsable for the development of the Nero Linux burning application. So I have access to all the source code of the application.
Now let's go with the story: It seems that there is a slight problem in the libata (and also the new pata_xxx) interfaces with the data returned by the INQUIRY cmd since every S-ATA or IDE device is assumed to be a SCSI dev.
Normally, the IDE devices (physical type) can be differentied with the format field of the inquiry data, i.e. the last bytes (ANSI version) are set to 0 -> This is done and works great with USB external devices for example.
The thing is that with S-ATA/IDE devices when using the libata/pata driver, the version field is (always?) set to 5, as any _real_ SCSI device, and thus the physical device type cannot be checked anymore.
I cannot go so deep in details, but our burn engine is differentiating IDE and read-good-old-SCSI devices and handles them sometimes in a different way, so this differenciation is really important for us.
-> How can I detect the real physical device type now?
Best Regards, Mathieu
-- ********************************************************* Mathieu Fluhr Linux Development Team Leader
E-mail: mfluhr@nero.com
NERO - BECAUSE TECHNOLOGY COUNTS www.nero.com
********************************************************* Nero AG Im Stoeckmaedle 13-15 76307 Karlsbad Germany
Vorstand/CEO: Richard Lesser Aufsichtsratvorsitzender/chairman of the supervisory board: Jim Corbett
Amtsgericht Mannheim HRB 362519 ********************************************************* This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden. *********************************************************
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |