From owner-freebsd-usb@FreeBSD.ORG  Mon Feb 18 16:29:19 2008
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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Mon, 18 Feb 2008 17:30:16 +0100
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Subject: Re: Copying to usb flash drive corrupts files
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On Monday 18 February 2008, =C5=81ukasz Sromek wrote:
> Hello.
>
> I asked this question on bsdforums.org, but I got no answer. I guess
> this list is a better place to post problems like this.
>
> When I copy mp3s from hard drive to usb stick they become corrupted.
>
> lukasz ~% mount /mnt/usb
> lukasz ~% cp file.mp3 /mnt/usb
> lukasz ~% diff file.mp3 /mnt/usb/file.mp3
> lukasz ~% umount /mnt/usb
> lukasz ~% mount /mnt/usb
> lukasz ~% diff file.mp3 /mnt/usb/file.mp3
> Files file.mp3 and /mnt/usb/file.mp3 differ
>
> If I set sync option in fstab:
>
> /dev/da0 /mnt/usb msdosfs rw,noauto,sync 0 0
>
> Then files are copied correctly, but very slowly, when buffer size is
> low. Midnight Commander uses 8k buffers, so I get about 20kB/s which
> is unacceptable.
>
> I'm using FreeBSD 7.0-RC2.
>
> Could you help me with this issue?

Maybe your memory stick is corrupted ?

What is the brand ?

=2D-HPS