linux-kernel - Re: [PATCH] JMicron JM20337 USB-SATA data corruption bugfix

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Message-ID: <82ecf08e0809040817l73b1bb9dn8d01212708feadd4@mail.gmail.com>
Date:	Thu, 4 Sep 2008 12:17:27 -0300
From:	"Thiago Galesi" <thiagogalesi@...il.com>
To:	"Alan Stern" <stern@...land.harvard.edu>
Cc:	"Alex Buell" <alex.buell@...ted.org.uk>,
	linux-kernel@...r.kernel.org, "Robert Hancock" <hancockr@...w.ca>,
	"Tomas Styblo" <tripie@...n.org>, linux-usb@...r.kernel.org,
	usb-storage@...ts.one-eyed-alien.net
Subject: Re: [PATCH] JMicron JM20337 USB-SATA data corruption bugfix - device 152d:2338

>
> Who would ever design a device that was supposed to stop working when
> it received an unknown command?  Obviously there's a bug either in the
> device or in the JMicron adapter.

I agree :)

> What commands does cdrecord send and where does it fail?
>

If I remember correctly it was a problem during the actual recording.
I'll redo that, but it will probably mean another coaster in my desk ;)

> Oh yes, one other thing...  Have you tried hooking this drive directly
> to an IDE cable (avoiding the USB-ATA adapter) to see if it works okay
> in that environment?  If it does then you know where the bug is.

I'll try that. My bet is on the USB converter, since reloading the
entire usb modules chain makes it work again
Problem is I'm not using this drive as an 'external drive', rather,
the jmicron device is in the motherboard, providing a 'native IDE
port' in the MB (I know, I know)

Needless to say this works flawlessly in that other proprietary OS...

-- 
-
Thiago Galesi
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