On Fri, Apr 09, 2010 at 06:18:35PM +0200, Ondrej Zary wrote: > Windows reports 1921024 sectors too. But the partition is only half the size. > Accessing sectors 0 to 960511 works fine. Accessing sector 960512 and higher > causes the device to fail. > > The memory stick is SanDisk Memory Stick Pro Duo 512MB. So the device reports > doubled capacity. > > How to fix this? I don't see an easy way to add something like > US_FL_DOUBLED_CAPACITY. Initializer functions does not seem to be able to > modify capacity. You can't do it from usb-storage. You need to do it in sd.c, which is where the sector count is kept. In slave_configure, usb-storage does set some flags to tell sd.c to reduce the sector count by 1 -- look for references to fix_capacity or guess_capacity flags. You would have to implement a flag to reduce capacity by half in sd.c, then set that flag in slave_configure in response to a new flag. Alternatively, you could figure out what is accessing the 2nd half of the media and turn it off. Likely candidates include hal, udev, or the kernel advanced partitioning code. Matt -- Matthew Dharm Home: mdharm-usb@xxxxxxxxxxxxxxxxxx Maintainer, Linux USB Mass Storage Driver Oh BAY-bee. -- Dust Puppy to Greg User Friendly, 12/13/1997
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