# mount -t iso9660 -o loop file.iso /mnt # Mount a CD image
# mount -t ext3 -o loop file.img /mnt # Mount an image with ext3 fs
Copy the raw data from a cdrom into an iso image:
# dd if=/dev/cd0c of=file.iso
Convert a Nero .nrg file to .iso
Nero simply adds a 300Kb header to a normal iso image. This can be trimmed with dd
# dd bs=1k if=imagefile.nrg of=imagefile.iso skip=300
Create a memory file system
A memory based file system is very fast for heavy IO application. How to create a 64 MB partition mounted on /memdisk:
# mount -t tmpfs -osize=64m tmpfs /memdisk
Create a file based Image
For example a partition of 1GB using the file /usr/vdisk.img. Here we use the vnode 0, but it could also be 1.
The file based image can be automatically mounted during boot with an entry in /etc/rc.conf and /etc/fstab.
# dd if=/dev/zero of=/usr/vdisk.img bs=1024k count=1024
# mkfs.ext3 /usr/vdisk.img
# mount -o loop /usr/vdisk.img /mnt
# umount /mnt; rm /usr/vdisk.img # Cleanup
# mount -t ext3 -o loop file.img /mnt # Mount an image with ext3 fs
# mount -o loop file.iso /mnt # extract an iso image to mnt
Remount a device without unmounting it.
# mount -o remount,ro /
# dd if=/dev/cd0c of=file.iso
Convert a Nero .nrg file to .iso
Nero simply adds a 300Kb header to a normal iso image. This can be trimmed with dd
# dd bs=1k if=imagefile.nrg of=imagefile.iso skip=300
Create a memory file system
A memory based file system is very fast for heavy IO application. How to create a 64 MB partition mounted on /memdisk:
# mount -t tmpfs -osize=64m tmpfs /memdisk
Create a file based Image
For example a partition of 1GB using the file /usr/vdisk.img. Here we use the vnode 0, but it could also be 1.
The file based image can be automatically mounted during boot with an entry in /etc/rc.conf and /etc/fstab.
# dd if=/dev/zero of=/usr/vdisk.img bs=1024k count=1024
# mkfs.ext3 /usr/vdisk.img
# mount -o loop /usr/vdisk.img /mnt
# umount /mnt; rm /usr/vdisk.img # Cleanup
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