Date: Tue, 19 Feb 2008 15:26:08 -0800 From: Marcel Moolenaar <xcllnt@mac.com> To: =?UTF-8?Q?=C5=81ukasz_Sromek?= <lukasz.sromek@gmail.com> Cc: freebsd-usb@freebsd.org Subject: Re: Copying to usb flash drive corrupts files Message-ID: <90085DD7-B0D6-4F95-ACAA-664B04FC2E37@mac.com> In-Reply-To: <32f529bc0802191512t355c4d81wefdf08fda6bb0ad9@mail.gmail.com> References: <32f529bc0802180102m6fa12e32x1903e3a8b98a70b3@mail.gmail.com> <200802181730.17473.hselasky@c2i.net> <32f529bc0802181358n3ac34ec2saa23bc658507ba8f@mail.gmail.com> <200802191725.06156.hselasky@c2i.net> <32f529bc0802191400h29073d50xd23478a3389a4557@mail.gmail.com> <32f529bc0802191512t355c4d81wefdf08fda6bb0ad9@mail.gmail.com>
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On Feb 19, 2008, at 3:12 PM, =C5=81ukasz Sromek wrote: > So I thought, maybe just reading is broken somehow. I've booted > freebsd again, mounted usb stick and copied some files. But when I > tried to read them under windows I got errors. We've ran into a bad USB-NAND flash controller revision here at work that resulted in lost writes. The problem was that a SYNCHRONIZE_CACHE command would stall the USB device, which we then cleared correctly, but a prior write would not hit the NAND flash. An USB analyzer would give us the information we need... FYI, --=20 Marcel Moolenaar xcllnt@mac.com
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