>> I have a Jenoptik JD6.0 digital camera (a rather cheap one), which can >> be attached as an USB storage device. I've had some problems mounting >> the camera under Linux, and I've now found out what the reason is: if >> the SD card is at least 256 MB in size, the camera generates errors when >> reading the last 8 sectors. This happened with several different SD >> cards, so it's most likely a camera problem. > Any such workaround would have to go into the SCSI disk driver, not > usb-storage. All usb-storage does is transfer commands and results back > and forth between the SCSI core and the USB device. If the commands > themselves are bad, the SCSI driver needs to be changed to prevent it from > issuing them. Oh, okay, I didn't know that. But aren't there a bunch of workarounds based on USB ID in the usb-storage driver?
> Although perhaps nothing really needs to be changed. Can you set the > low-level format of the SD card (e.g., fdisk) so that the main partition > doesn't include the last 8 sectors? That's exactly what I tried first - unfortunately, the camera insists on formatting the card afterwards and it was back to square one. What did work is shrinking the partition by 16 sectors with a hex editor (the partition table generated by the camera is utterly broken and seems to confuse fdisk). This is even a permanent fix, as long as the card isn't formatted in the camera - I was only hoping that there could be a kernel-based fix so that people who are not readily at hand with a hex editor can use it, too.. BTW: does the SCSI disk driver know about USB IDs? I presume not, in which case fixing this in the SCSI subsystem isn't possible anyway.. Yours, Florian -- Chuck Norris _can_ divide by zero. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
