Haha, new Q appears: why "fdisk -l" shows
"/dev/mapper/bob-test--pure--ntfs--upon--lvm1" but fs says no.
I confirmed ""/dev/mapper/bob-test--pure--ntfs--upon--lvm1" below:
[root@localhost ~]# fdisk -l |grep pure
disk /dev/mapper/bob-test--pure--ntfs--upon--lvm??53.7 GB, 53687091200
bytes??104857600 sectors
/dev/mapper/bob-test--pure--ntfs--upon--lvm1 2048 104853503
52425728 7 HPFS/NTFS/exFAT
[root@localhost ~]# ls -a /dev/mapper/
. .. bob-test--pure--ntfs--upon--lvm centos7-root centos7-swap control
[root@localhost ~]# dd if=/dev/mapper/bob-test--pure--ntfs--upon--lvm1 count=1
| od -t x1 | head -n 1
dd: open "/dev/mapper/bob-test--pure--ntfs--upon--lvm1" failed: no such a file
or directory
0000000
[root@localhost ~]# dd if=/dev/bob/test--pure--ntfs--upon--lvm1 count=1 | od -t
x1 | head -n 1
dd: open "/dev/bob/test--pure--ntfs--upon--lvm1" failed: no such a file or
directory
0000000
[root@localhost ~]# ls -a /dev/bob/
. .. test-pure-ntfs-upon-lvm
but vda(/dev/mapper/bob-test--pure--ntfs--upon--lvm), named e: on guest, ntfs
partition, works ok.
Regards!
------------------ ???????? ------------------
??????: "Jean-Pierre Andr??";<jean-pierre.an...@wanadoo.fr>;
????????: 2017??2??22??(??????) ????5:24
??????: "xiucai"<hualing...@foxmail.com>;
????: "ntfs-3g-devel"<ntfs-3g-devel@lists.sourceforge.net>;
????: Re: ?????? reply?? [ntfs-3g-devel] why failed to mount n NTFS block
devicebased on LVM and formated by VM(Win7-Guest, CentOS7-Host)?
xiucai wrote:
> Hi,
>
> I am so glad to get your warm-hearted respose:)
> I am working in Chinese environment, so these given illustrations may
> cause trouble:(
> I wish it could not affect what we talking about:)
>
> *1*, there is no /*test-pure-ntfs-upon-lvm*/*1*, *only*
> *test-pure-ntfs-upon-lvm* exists:(
Well, in your message, I see :
[root@localhost mnt]# fdisk -l |grep NTFS |grep pure
/dev/mapper/centos7-test--pure--ntfs1 2048 104853503
52425728 7 HPFS/NTFS/exFAT
IMHO this exists and this is what you want to mount,
you should be able to "dd" from it to confirm it is
formatted as ntfs.
Jean-Pierre
>
> *2*, I did "/3, make this new disk online and format it(MBR+NTFS)/" in
> Win7(VM), the windows-computer-manager,
> because i had attached test-pure-ntfs-upon-lvm to this VM.
> # for example:
> # qemu-img create -f qcow2 test.qcow2 10G
> # virsh attach-disk xdomain absolute_path_to_test.qcow2 vda
> # then vm will feel vda(disk1)
> # then operate vda(disk1) in vm, init it(mbr), create new simple volume
> and format it(ntfs)
>
>
> Regards!
>
> ------------------ ???????? ------------------
> *??????:* "Jean-Pierre Andr??";<jean-pierre.an...@wanadoo.fr>;
> *????????:* 2017??2??22??(??????) ????3:25
> *??????:* "xiucai"<hualing...@foxmail.com>;
> *????:* "ntfs-3g-devel"<ntfs-3g-devel@lists.sourceforge.net>;
> *????:* Re: reply?? [ntfs-3g-devel] why failed to mount n NTFS block
> devicebased on LVM and formated by VM(Win7-Guest, CentOS7-Host)?
>
> Hi,
>
> xiucai wrote:
> > Thank Jean-Pierre:)
> >
> > I am so sorry for my delay because of some job's causes.
> >
> > dd if=/dev/bob/test-pure-ntfs-upon-lvm count=1 | od -t x1 | head -n 1
> > /# ??????1+0 ??????/
> > /# ??????1+0 ??????/
> > /# 512????(512 B)????????0.00025462 ????2.0 MB/??/
> > /# 0000000 33 c0 8e d0 bc 00 7c 8e c0 8e d8 be 00 7c bf 00/
>
> This does not yield an ntfs image interface, you
> will not be able to mount it as ntfs, and this does
> not look like an mbr either.
>
> What were your commands to :
> "3, make this new disk online and format it(MBR+NTFS)"
> As you mention the MBR, you might have wanted to create
> a partitioned image, with an ntfs partition inside, but
> this is not what is shown above.
>
> I was also asking for the outputs of :
>
> dd if=/dev/mapper/centos7-test--pure--ntfs count=1 | od -t x1 | head -n 1
> and
> dd if=/dev/mapper/centos7-test--pure--ntfs1 count=1 | od -t x1 | head -n 1
>
> Jean-Pierre
>
> > /# note: locale is "LANG=zh_CN.UTF-8"/
> > /
> > /
> > I do this same test again, details besides above are below:
> >
> > lsblk
> > /# sdb&sdc available/
> >
> > pvcreate /dev/sdb
> >
> > pvcreate /dev/sdc
> >
> > vgcreate bob /dev/sdb /dev/sdc
> >
> > lvcreate -L 50G -n test-pure-ntfs-upon-lvm bob
> >
> > lsblk
> > /# sdb 8:16 0 557.8G 0 disk /
> > /# ????bob-test--pure--ntfs--upon--lvm 253:2 0 50G 0 lvm/
> > /# sdc 8:32 0 1.1T 0 disk/
> >
> > virsh start __ws2008r2x64
> >
> > virsh attach-disk __ws2008r2x64 /dev/bob/test-pure-ntfs-upon-lvm vda
> > /# then format vda within __ws2008r2x64/
> > /# "cmd" and run "wmic logicaldisk > wmic-logicaldisk.txt"/
> > /# wmic-logicaldisk.txt shows e drive(vda) is ntfs/
> > /# write something in e drive(vda) and shutdown __ws2008r2x64/
> >
> > rpm -qa |grep ntfs
> > /# ntfsprogs-2016.2.22-1.el7.x86_64/
> > /# ntfs-3g-2016.2.22-1.el7.x86_64/
> > /# ntfs-3g-debuginfo-2016.2.22-1.el7.x86_64/
> > /# ntfs-3g-devel-2016.2.22-1.el7.x86_64/
> >
> > mkidr /mnt/ntfs
> >
> > ntfs-3g /dev/bob/test-pure-ntfs-upon-lvm /mnt/ntfs/
> > /#Failed to mount '/dev/mapper/bob-test--pure--ntfs--upon--lvm': invalid
> > parameters./
> > /# The device '/dev/mapper/bob-test--pure--ntfs--upon--lvm' doesn't seem
> > to have a valid NTFS./
> > /# Maybe the wrong device is used? Or the whole disk instead of a
> > partition?/
> > /# Or the other way around?/
> >
> > ll /dev/bob
> > /# lrwxrwxrwx 1 root root 7 2?? 22 11:05 test-pure-ntfs-upon-lvm ->
> > ../dm-2/
> >
> > ll /dev/block
> > /# lrwxrwxrwx 1 root root 7 2?? 17 17:30 253:0 -> ../dm-0/
> > /# lrwxrwxrwx 1 root root 7 2?? 17 17:30 253:1 -> ../dm-1/
> > /# lrwxrwxrwx 1 root root 7 2?? 22 11:05 253:2 -> ../dm-2/
> > /# lrwxrwxrwx 1 root root 6 2?? 17 17:30 8:0 -> ../sda/
> > /# lrwxrwxrwx 1 root root 7 2?? 17 17:30 8:1 -> ../sda1/
> > /# lrwxrwxrwx 1 root root 6 2?? 22 10:00 8:16 -> ../sdb/
> > /# lrwxrwxrwx 1 root root 7 2?? 17 17:30 8:2 -> ../sda2/
> > /# lrwxrwxrwx 1 root root 7 2?? 17 17:30 8:3 -> ../sda3/
> > /# lrwxrwxrwx 1 root root 6 2?? 22 10:00 8:32 -> ../sdc/
> > /# lrwxrwxrwx 1 root root 6 2?? 17 17:30 8:48 -> ../sdd/
> >
> >
> > Thx for anyone who check this mail:)
> >
> > Regards!
> >
> > ------------------ ???????? ------------------
> > *??????:* "Jean-Pierre Andr??";<jean-pierre.an...@wanadoo.fr>;
> > *????????:* 2017??2??10??(??????) ????6:45
> > *??????:* "xiucai"<hualing...@foxmail.com>;
> > "ntfs-3g-devel"<ntfs-3g-devel@lists.sourceforge.net>;
> > *????:* Re: [ntfs-3g-devel] why failed to mount n NTFS block devicebased
> > on LVM and formated by VM(Win7-Guest, CentOS7-Host)?
> >
> > Hi
> >
> > What is your device path which represents your
> > ntfs partition /dev/centos7/test-pure-ntfs
> > or /dev/mapper/centos7-test--pure--ntfs
> > or /dev/mapper/centos7-test--pure--ntfs1 ?
> >
> > Please post the outputs of (as root) :
> > dd if=/dev/DEVICE count=1 | od -t x1 | head -n 1
> > replacing DEVICE by centos7/test-pure-ntfs etc.
> >
> > Jean-Pierre
> >
> >
> > xiucai wrote:
> > > hi,
> > >
> > > my steps are:
> > > 1, lvcreate, make a lv, named test-pure-ntfs, vg is
> > > centos7(consisted of sdb);
> > > 2, virsh attach-disk, attach test-pure-ntfs to an
> > > VM(Windows-Server2008R2x64);
> > > 3, make this new disk online and format it(MBR+NTFS);
> > > 4, then this disk can rw normally within VM;
> > > 5, ntfs-3g, mount test-pure-ntfs on a existed
> path(/mnt/ntfs/), but
> > > failed!
> > >
> > > so, why?
> > > do not ntfs-3g support my case?
> > >
> > > ==========here are parts of my actions==========
> > > [root@localhost mnt]# mount -t ntfs-3g /dev/centos7/test-pure-ntfs
> > > /mnt/ntfs/
> > > NTFS signature is missing.
> > > Failed to mount '/dev/mapper/centos7-test--pure--ntfs': invalid
> parameter
> > > The device '/dev/mapper/centos7-test--pure--ntfs' 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@localhost mnt]# fdisk -l |grep NTFS |grep pure
> > > /dev/mapper/centos7-test--pure--ntfs1 2048 104853503
> > > 52425728 7 HPFS/NTFS/exFAT
> > > [root@localhost mnt]# lsblk |grep pure
> > > ????centos7-test--pure--ntfs 253:4 0 50G 0 lvm
> > > [root@localhost mnt]# lvscan |grep pure
> > > ACTIVE '/dev/centos7/test-pure-ntfs' [50.00 GiB] inherit
> > >
> > > [root@localhost mnt]# ntfs-3g /dev/centos7/test-pure-ntfs /mnt/ntfs/
> > > <try again, equals to mount~~~ above>
> > > NTFS signature is missing.
> > > Failed to mount '/dev/mapper/centos7-test--pure--ntfs': invalid
> parameter
> > > The device '/dev/mapper/centos7-test--pure--ntfs' 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?
> > >
> > > thanks for anyone who check this email :)
> > >
> > > regards!
> > >
>
>
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