[PC-BSD Testing] Mounting USB Hard Drives

Jeff dejamuse at yahoo.com
Fri May 7 11:42:26 PDT 2010

This drive is a WD combo, 300GB, NTFS.

It works fine under Windoze.

This gives an error (invalid argument): mount -o large -t msdosfs /dev/da1 /media/Backup

Ditto with: mount -o large -t msdosfs /dev/da1s1 /media/Backup

Both da1 and da1s1 are shown in the dev list (perms = 640), but camcontrol shows it as da1.

The drive is recognized when plugged in and the little USB stick symbol shows up in Dolphin but when you click on it nothing happens.

--- On Thu, 5/6/10, Mike Bybee <mbybee at dometrilogy.com> wrote:

From: Mike Bybee <mbybee at dometrilogy.com>
Subject: Re: [PC-BSD Testing] Mounting USB Hard Drives
To: "PC-BSD Testing list" <testing at lists.pcbsd.org>
Date: Thursday, May 6, 2010, 5:57 PM

On Thu, May 6, 2010 at 2:33 PM, Ian Robinson <fitchkendall at gmail.com> wrote:

On Thu, May 6, 2010 at 3:00 PM, Jeff wrote:

Another drive I have was formatted for Windoze.? Way back in PCBSD 7 or possibly earlier, I was able to read this drive and retrieve some old Windoze files.? I cannot mount this drive anymore using various combinations of: mount_msdosfs -o large /dev/da0s1 /media/Backup

Or: mount -o large -t msdosfs /dev/da0s1 /media/Backup

camcontrol devlist reports this drive as da0.
1.  Sometimes a USB device will not mount with the /dev/da0s1 argument but will mount with /dev/da0 

2.  The FreeBSD handbook (@ http://www.freebsd.org/doc/en/books/handbook/usb-disks.html  ) adds a couple of "extras" which may be worth reviewing:

======= Begin Quote from FreeBSD Handbook ================
"To make this device mountable as a normal user, certain steps have to be taken. First,
the devices that are created when a USB storage device is connected need to be accessible
by the user. A solution is to make all users of these devices a member of the operator group. This is done with pw(8). Second, when
the devices are created, the operator group should be able to
read and write them. This is accomplished by adding these lines to /etc/devfs.rules:

add path 'da*' mode 0660 group operator

Note: If there already are SCSI disks in the system, it must be done a bit
different. E.g., if the system already contains disks da0
through da2 attached to the system, change the second line as

add path 'da[3-9]*' mode 0660 group operator

This will exclude the already existing disks from belonging to the operator group.

You also have to enable your devfs.rules(5) ruleset
in your /etc/rc.conf file:


Next, the kernel has to be configured to allow regular users to mount file systems.
The easiest way is to add the following line to /etc/sysctl.conf:


Note that this only takes effect after the next reboot. Alternatively, one can also
use sysctl(8) to set this

The final step is to create a directory where the file system is to be mounted. This
directory needs to be owned by the user that is to mount the file system. One way to do
that is for root to create a subdirectory owned by that user as
/mnt/username (replace username by the login name of the actual user and usergroup by the user's primary group):

# mkdir /mnt/username
# chown username:usergroup /mnt/username"

======= End Quote from FreeBSD Handbook ================

3.  The last three Western Digital external USB drives I bought with 500 Gb and larger came formatted NTFS.  Are yours formatted Fat32 or NTFS?

4.  Even then, NTFS may present mounting issues on 8.0/64 bit installations.  See "	[solved]			Can't mount ntfs usb hard drive" @ 4ttp://forums.freebsd.org/showthread.php?t=11968

5.  There are reports of USB disks hanging during the boot/POST sequence with a recommendation to "disable legacy USB support" in the BIOS.  See @ http://forums.freebsd.org/showthread.php?t=11650

Ian Robinson
Salem, Ohio


Testing mailing list

Testing at lists.pcbsd.org


I've had major issues with NTFS USB drives on the new PC-BSD 8 images - especially the higher capacity ones. It's almost critical to make sure you plug them in once you're logged in - I haven't gotten one to work yet if it was plugged in prior to booting.

Also worth noting is that the new extFAT that some of the new thumbdrives come with is nearly impossible to get working (I found it's far easier to just reformat them).

Mike Bybee

-----Inline Attachment Follows-----

Testing mailing list
Testing at lists.pcbsd.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.pcbsd.org/pipermail/testing/attachments/20100507/56e8fc5b/attachment.html>

More information about the Testing mailing list