Date: Thu, 1 Mar 2018 09:58:25 -0500 From: "James B. Byrne" <byrnejb@harte-lyne.ca> To: "tech-lists" <tech-lists@zyxst.net> Cc: freebsd-questions@freebsd.org Subject: Re: usb memory sticj recovery Message-ID: <4a1d519581de35e96e95747ea9336177.squirrel@webmail.harte-lyne.ca> In-Reply-To: <mailman.106.1519905651.47584.freebsd-questions@freebsd.org> References: <mailman.106.1519905651.47584.freebsd-questions@freebsd.org>
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On Wed, February 28, 2018 13:54, tech-lists wrote:
> On 28/02/2018 16:19, James B. Byrne via freebsd-questions wrote:
>> I have a usb memory stick whose filesystem FreeBSD will not mount
>> because it is 'dirty'. It is dirty because it was removed from the
>> FreeBSD host it was connected to. I would would like to recovery
>> this
>> device if possible but my attempts to do so using fsck and fsck_ffs
>> never start because it cannot find a SUPERBLOCK.
>>
>> newfs -N gives a list of alternate sb location but fsck_ffs will not
>> acept them.
>>
>> Is there any way to manually turn ff the dirt bit and mount the
>> device?
>>
>>
>
> man 8 mount:
>
> [...]
>
> -f
>
> Forces the revocation of write access when trying to downgrade a
> file system mount status from read-write to read-only. Also
> forces the R/W mount of an unclean file system (dangerous; use with
> caution).
This did not succeed. I do not have the exact message any more so I
cannot provide the reason stated.
>
> [...]
>
> alternatively dd the device to an image and mount the image at /mnt
> using mdconfig
Also did not work. Messages were:
mount -t msdosfs /dev/`mdconfig -f /root/usb_pki_master.img` /mnt
mount_msdosfs: /dev/md2: Invalid argument
mount -t ext3 /dev/`mdconfig -f /root/usb_pki_master.img` /mnt
mount: /dev/md3: Operation not supported by device
mount -t ufs /dev/`mdconfig -f /root/usb_pki_master.img` /mnt
mount: /dev/md4: Invalid argument
--
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