Re: [gentoo-user] Trying to loopback mount partition from a disk image
On Montag 23 November 2009, Stroller wrote: Hi there, With reference to a couple of previous threads: http://thread.gmane.org/gmane.linux.gentoo.user/193263 http://thread.gmane.org/gmane.linux.gentoo.user/197120 Here's what I'm trying: $ ls -lh sda.dd.img -rw-r--r-- 1 stroller users 77G 2009-11-22 03:51 sda.dd.img $ file sda.dd.img sda.dd.img: x86 boot sector, Microsoft Windows XP MBR, Serial 0x1890189; partition 1: ID=0x7, active, starthead 1, startsector 63, 160810587 sectors, code offset 0xc0 $ parted sda.dd.img p WARNING: You are not superuser. Watch out for permissions. Model: (file) Disk /path/to/sda.dd.img: 82.3GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End SizeType File system Flags 1 32.3kB 82.3GB 82.3GB primary ntfs boot $ fdisk -l sda.dd.img You must set cylinders. You can do this from the extra functions menu. Disk sda.dd.img: 0 MB, 0 bytes 255 heads, 63 sectors/track, 0 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x01890189 Device Boot Start End Blocks Id System sda.dd.img1 * 1 1001080405293+ 7 HPFS/NTFS Partition 1 has different physical/logical endings: phys=(1023, 254, 63) logical=(10009, 254, 63) $ $ sudo losetup -o 8225280 /dev/loop0 sda.dd.img $ sudo mount -v /dev/loop0 /mnt/floppy/ mount: you didn't specify a filesystem type for /dev/loop0 I will try all types mentioned in /etc/filesystems or /proc/ filesystems Trying # Trying #vfat Trying fuseblk mount: you must specify the filesystem type $ If I format a USB stick as NTFS I can mount and read it fine, so NTFS driver modules are correctly compiled into the kernel. I can `losetup` to a loop device and then `fdisk -l` or `parted /dev/ loop0 p` and see the partitions. I've tried with an offset of 512 bytes instead of 8225280 with the same results - I guess I'm getting a little confused about what the correct offset should be. Thinking about this now it seems obvious that 512 should be correct, but anyway, that isn't working. I get the same as Pat trying this: http://article.gmane.org/gmane.linux.gentoo.user/197123 But: $ sudo losetup -d /dev/loop0 $ sudo losetup /dev/loop0 sda.dd.img $ sudo fdisk -l /dev/loop0 Disk /dev/loop0: 82.3 GB, 82348277760 bytes 255 heads, 63 sectors/track, 10011 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x01890189 Device Boot Start End Blocks Id System /dev/loop0p1 * 1 1001080405293+ 7 HPFS/NTFS $ /dev/loop0p1 seems inaccessible to me. Really, any suggestions on how to access this virtual partition would be great. Oh, I've also tried to run ntfsclone on it, because that can produce images which can be loopback mounted (as per `man ntfsclone`) but again, ntfsclone need to be pointed at a partition of a hard-drive in order to produce the loopback-mountable image in the first place. Any thoughts? Stroller. yeah, you don't need to use losetup. I mounted a lot of images over the years and I never used losetup.
Re: [gentoo-user] Trying to loopback mount partition from a disk image
On 23 Nov 2009, at 18:50, Volker Armin Hemmann wrote: On Montag 23 November 2009, Stroller wrote: Hi there, With reference to a couple of previous threads: http://thread.gmane.org/gmane.linux.gentoo.user/193263 http://thread.gmane.org/gmane.linux.gentoo.user/197120 Here's what I'm trying: $ ls -lh sda.dd.img -rw-r--r-- 1 stroller users 77G 2009-11-22 03:51 sda.dd.img $ file sda.dd.img sda.dd.img: x86 boot sector, Microsoft Windows XP MBR, Serial 0x1890189; partition 1: ID=0x7, active, starthead 1, startsector 63, 160810587 sectors, code offset 0xc0 ... yeah, you don't need to use losetup. I mounted a lot of images over the years and I never used losetup. How do I do it then, please? Note, it's an image of an entire hard-drive, imaged using `dd` or GNU `ddrescue`, so it also includes the MBR partition table. It's not just a partition or an .iso optical disk image. Stroller.
Re: [gentoo-user] Trying to loopback mount partition from a disk image
Volker Armin Hemmann writes: On Montag 23 November 2009, Stroller wrote: $ fdisk -l sda.dd.img You must set cylinders. You can do this from the extra functions menu. Disk sda.dd.img: 0 MB, 0 bytes 255 heads, 63 sectors/track, 0 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x01890189 Device Boot Start End Blocks Id System sda.dd.img1 * 1 1001080405293+ 7 HPFS/NTFS Partition 1 has different physical/logical endings: phys=(1023, 254, 63) logical=(10009, 254, 63) $ $ sudo losetup -o 8225280 /dev/loop0 sda.dd.img Try -o $(( 63*512 )). 63 is the start sector, you see this when you enter the U command in fdisk in order to change the units. yeah, you don't need to use losetup. I mounted a lot of images over the years and I never used losetup. Um, even if the partition does not start at the beginning? I tried this a while ago, giving the offset directly as mount option, but it did not work at all. But when I also tried it manually with losetup, I succeeded. Wonko
Re: [gentoo-user] Trying to loopback mount partition from a disk image
On Montag 23 November 2009, Stroller wrote: On 23 Nov 2009, at 18:50, Volker Armin Hemmann wrote: On Montag 23 November 2009, Stroller wrote: Hi there, With reference to a couple of previous threads: http://thread.gmane.org/gmane.linux.gentoo.user/193263 http://thread.gmane.org/gmane.linux.gentoo.user/197120 Here's what I'm trying: $ ls -lh sda.dd.img -rw-r--r-- 1 stroller users 77G 2009-11-22 03:51 sda.dd.img $ file sda.dd.img sda.dd.img: x86 boot sector, Microsoft Windows XP MBR, Serial 0x1890189; partition 1: ID=0x7, active, starthead 1, startsector 63, 160810587 sectors, code offset 0xc0 ... yeah, you don't need to use losetup. I mounted a lot of images over the years and I never used losetup. How do I do it then, please? Note, it's an image of an entire hard-drive, imaged using `dd` or GNU `ddrescue`, so it also includes the MBR partition table. It's not just a partition or an .iso optical disk image. Stroller. modprobe loop mount -o loop /image /pfad
Re: [gentoo-user] Trying to loopback mount partition from a disk image
On 23 Nov 2009, at 19:11, Alex Schuster wrote: Volker Armin Hemmann writes: On Montag 23 November 2009, Stroller wrote: $ fdisk -l sda.dd.img You must set cylinders. You can do this from the extra functions menu. Disk sda.dd.img: 0 MB, 0 bytes 255 heads, 63 sectors/track, 0 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x01890189 Device Boot Start End Blocks Id System sda.dd.img1 * 1 1001080405293+ 7 HPFS/NTFS Partition 1 has different physical/logical endings: phys=(1023, 254, 63) logical=(10009, 254, 63) $ $ sudo losetup -o 8225280 /dev/loop0 sda.dd.img Try -o $(( 63*512 )). 63 is the start sector, you see this when you enter the U command in fdisk in order to change the units. Brilliant! That's it! Many thanks. Stroller.
