Date: Sun, 7 Sep 2003 00:32:46 -0700 From: John-Mark Gurney <gurney_j@efn.org> To: "raoul.megelas" <raoul.megelas@libertysurf.fr> Cc: freebsd-current@freebsd.org Subject: Re: usb flashkey disk copy error Message-ID: <20030907073246.GD39788@funkthat.com> In-Reply-To: <20030907064510.GA702@libertysurf.fr> References: <20030907064510.GA702@libertysurf.fr>
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raoul.megelas wrote this message on Sun, Sep 07, 2003 at 08:45 +0200:
> I have a copy error between hdd and a flashkey 1gig usb (easydisk)
> on Current dated August 28. Here is in short:
>
> mount -t msdos /dev/da2s1 /flashkey
> cp myfile /flashkey/
> diff myfile /flashkey/myfile
> (ok).
could you try a fsync /flashkey/myfile before the umount?
> umount /flashkey
>
> mount (flashkey)
> diff myfile /flashkey/myfile
> (Binary file differ)!
>
> It is not a flashkey disk error, it works on XP.
> Note that this error occurs on FreeBSD 4.8 too.
>
> Please, can you tell me how to deal with that?
> And in an other hand can you tell me how to obtain the exact map of the flashkey
> to verify the writing on the disk.
> Thanks in advance for this newbie question.
You're the second person that has reported corruption with USB umass
devices. I am interested in tracking down this problem, but it's a
bit difficult since I haven't seen it myself.
(I currently don't quite have a test bed box to play with, but I will
in the next week.)
Thanks.
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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