Re: [PATCH] Forcing SCSI capacity for broken SD Card readers

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On Sun, 20 Dec 2009, Clemens Fruhwirth wrote:

> > Can you run USBMON (see Documentation/usb/usbmon.txt) to capture
> > the initialization sequence and post that to linux-usb? (CC'd already)
> 
> I attached the usbmon dump. I hope you can make sense of it.

Here's the relevant part of the usbmon trace:

> f6a3da00 145121701 S Bo:6:002:1 -115 31 = 55534243 49e50000 08000000 80010a25 00000000 00000000 00000000 000000
> f6a3da00 145122669 C Bo:6:002:1 0 31 >
> f042d280 145122683 S Bi:6:002:2 -115 8 <
> f042d280 145123663 C Bi:6:002:2 0 8 = 001d87ff 00000200
> f6a3da00 145123675 S Bi:6:002:2 -115 13 <
> f6a3da00 145124659 C Bi:6:002:2 0 13 = 55534253 49e50000 00000000 00

The reader reports that the card has 0x1d87ff (= 1935359) blocks, each
containing 0x200 (= 512) bytes, yielding a total size slightly under 1
GB.

Alan Stern

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