Does a doc exist that provides a detailed description of the different

errors that could be produced by libata and its associated drivers?

The libATA developer's guide provides a very good general description

of the types of messages, but I'm looking for more detail.
For example I got this error message last week:
Sep 27 17:29:26 server kernel: ata2.00: exception Emask 0x0 SAct 0x0

SErr 0x0 action 0x1

Sep 27 17:29:26 server kernel: ata2.00: (irq_stat 0x40000001)

Sep 27 17:29:26 server kernel: ata2.00: tag 0 cmd 0xb0 Emask 0x1 stat

0x51 err 0x4 (device error)
I'd like to know what the following items means?
(irq_stat 0x40000001)

tag 0

cmd 0xb0

emask 0x1

stat 0x51

err 0x4
Can anybody help?
Thanks,

-Mike

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> (irq_stat 0x40000001)	
	Internal libata error category (used to decide what to do to

	Error register of drive
You want the ATA specification document from T13 (www.t13.org)
Alan

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The ISDN driver documentation always listed the numbers in the kernel documentation

even though people in theory could have gotten it from the specification too.
I always found that quite convenient. Putting at least a summary in Documentation

would probably user-friendly. It tends to be hard to find stuff in specifications,

especially if you're not very familiar with the standard.
-Andi

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There are over 100 commands, and the status bits can only be read in

combination and according to some interpretation rules - it would be

quite a long document. The standards are also all publically available in

this case, albeit not neccessarily the most interesting read
AFAIK there is a patch queued to print some of the data in a more user

friendly format.

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It's pretty much all defined in the ATA or controller specifications...
Well, except for emask, which is a libata-only invention.
	Jeff
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