Hi, I just meant that file access might not cross similar layers from Windows (guest) and from Linux (host).
If you do not get an ntfs layout from Linux, you will surely not be able to mount. Maybe you reach a missing or not compatible virtualization layer. You might get better help from a qemu oriented list. Jean-Pierre xiucai wrote: > I am sorry, i can not understand what you said just now. > > My architechure is: > > Windows7-Guest > | > libvirt > QEMU-KVM > | > CentOS7-Host > > I make lv on Host, then attach it to Guest. > And then login Guest, initialize it(MBR), format it(NTFS), write > something to it, shutdown Guest. > Finally, I try to mount this lv using ntfs-3g, but failed. > That all. > > Thans anyway:) > > Regards! > > ------------------ ???????? ------------------ > *??????:* "Jean-Pierre Andr??";<jean-pierre.an...@wanadoo.fr>; > *????????:* 2017??2??23??(??????) ????5:28 > *??????:* "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: > > Haha, new Q appears: why "fdisk -l" shows > > "/dev/mapper/bob-test--pure--ntfs--upon--lvm1" but fs says no. > > Do you use the same virtualization stack on Linux and Windows ? > > Jean-Pierre > > > 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! > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ ntfs-3g-devel mailing list ntfs-3g-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ntfs-3g-devel
