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Date: Thu, 31 May 2012 19:39:30 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Jens Schweikhardt <schweikh@schweikhardt.net>
In-Reply-To: <20120531155704.GA2828@schweikhardt.net>
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References: <20120531155704.GA2828@schweikhardt.net>
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	(wonkity.com [127.0.0.1]); Thu, 31 May 2012 19:39:30 -0600 (MDT)
Cc: questions@freebsd.org
Subject: Re: How to use an external USB3.0 drive with 4k sectors?
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On Thu, 31 May 2012, Jens Schweikhardt wrote:

> so I decided to try two HW technology advancements in one go.
> I have a brand new shiny 1TB USB3.0 external disk, that when plugged
> to an USB2(two!) reports
>
>    da5 at umass-sim2 bus 2 scbus6 target 0 lun 0
>    da5: <ST1000LM 024 HN-M101MBB 0000> Fixed Direct Access SCSI-2 device
>    da5: 40.000MB/s transfers
>    da5: 953869MB (244190646 4096 byte sectors: 255H 63S/T 15200C)
>
> (The vendor, Jmicron, has put an NTFS on it, with a disk manual as a pdf file.
> Strangely, I cannot mount it with
> # ll /dev/da5*
> crw-r-----  1 root  operator    0, 236 May 31 15:05 /dev/da5
> crw-r-----  1 root  operator    0, 237 May 31 15:05 /dev/da5s1
> # mount -t ntfs -o ro /dev/da5s1  /mnt
> mount_ntfs: /dev/da5s1: Invalid argument
> )

It may not actually be an NTFS filesystem.  Try
# file -s /dev/da5s1

Much more likely to be a USB problem than something to do with block 
size.