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 Size Type 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 10010 80405293+ 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 10010 80405293+ 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.
