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From: "Chris H" <bsd-lists@bsdforge.com>
Subject: Re: NTFS disks mounting trouble
Date: Mon, 29 Feb 2016 07:57:39 -0800
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On Mon, 29 Feb 2016 14:01:07 +0300 Олег Жаркой <zoleg73@bk.ru> wrote

> Hi peoples!
> I install FreeBSD-Current and  sysutils/fusefs-ntfs , but when I try mount
> any NTFS partition I receive error message: [root@zbsd /dev]# ntfs-3g
> /dev/ada0s2  /mnt Error reading bootsector: Invalid argument
> Failed to mount '/dev/ada0s2': Invalid argument
> The device '/dev/ada0s2' doesn't seem to have a valid NTFS.
> Maybe the wrong device is used? Or the whole disk instead of a
> partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
> 
> [root@zbsd /dev]# file -s /dev/ada0s2
> /dev/ada0s2: DOS/MBR boot sector, code offset 0x52+2, OEM-ID "NTFS  ",
> sectors/cluster 8, Media descriptor 0xf8, sectors/track 63, heads 255, hidden
> sectors 2929352704, dos < 4.0 BootSector (0x80), FAT (1Y bit by descriptor);
> NTFS, sectors/track 63, sectors 921599, $MFT start cluster 38400, $MFTMirror
> start cluster 2, bytes/RecordSegment 2^(-1*246), clusters/index block 1,
> serial number 0a0b64eefb64ec60e 
>
> [root@zbsd /dev]# uname -a
> FreeBSD zbsd 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r296078: Fri Feb 26
> 18:55:46 IRKT 2016  root@zbsd:/usr/obj/usr/src/sys/zbsd  amd64 [root@zbsd
> /dev]# kldstat Id Refs Address  Size  Name
>  1  39 0xffffffff80200000 f50aa0  kernel
>  2  1 0xffffffff81152000 2d1670  zfs.ko
>  3  2 0xffffffff81424000 a398  opensolaris.ko
>  4  1 0xffffffff8142f000 b67ab0  nvidia.ko
>  5  2 0xffffffff81f97000 450c0  linux.ko
>  6  2 0xffffffff81fdd000 7ee8  linux_common.ko
>  7  1 0xffffffff81fe5000 14dd0  fuse.ko
>  8  1 0xffffffff82211000 23c7  ums.ko
>  9  1 0xffffffff82214000 1890  uhid.ko
> 10  1 0xffffffff82216000 1564  fdescfs.ko
> 11  1 0xffffffff82218000 23a  msdosfs_iconv.ko
> 12  1 0xffffffff82219000 322f  libiconv.ko
> 
> What wrong?
Dunno. Maybe a bad boot sector?
Is it possible to mount it via:
mount -t MSDOS /dev/ada0s2 /mnt
?
Just a hunch.

--Chris