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Date: Sun, 20 Apr 2014 15:45:28 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Wes Morgan <morganw@chemikals.org>, freebsd-usb@freebsd.org
Subject: Re: LBA Error on 128GB Flash Drive
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On 04/20/14 12:54, Wes Morgan wrote:
> I've got an ADATA 128gb USB3 flash drive (
> http://www.newegg.com/Product/Product.aspx?Item=N82E16820211819) that is
> giving me LBA errors. It appears that the drive is being mis-identified and
> reporting the wrong number of sectors. Camcontrol says the last block
> is 246960127, which I believe to be correct because any attempt to write to
> a block after that fails. However, the kernel thinks that the device
> has 247484416 sectors and pretty much everything fails to use the device
> properly because partition tables and filesystems like to store things at
> the end of devices. This is the second one of these I've had and both have
> the same error. My laptop is fairly old and USB2 only, but I've got some
> newer machines with USB3 ports and they have the same problem. Attaching
> the drive to a Linux machine reports the correct number of blocks.
>
> All my FreeBSD machines are running 10-stable.
>
> Camcontrol output:
> [morganw@mercury:~$]: camcontrol readcap da0
> Last Block: 246960127, Block Length: 512 bytes

Does the device have a bad disk label ?

gpart show da0

vs

diskinfo da0


--HPS