options] asr -imagescan
Copies the contents of a disk image or source volume onto a target volume. asr (Apple Software Restore) can also scan and prepare disk images when given the -imagescan option, allowing the images to be restored more efficiently. asr usually needs to run as root.
sourcepath can be the pathname of either a disk image or a volume, while
targetpath can specify only a volume. Volumes can be specified by either their /dev entries (e.g., /dev/disk0s10) or mountpoints (e.g., /Volumes/Disk 2).
For disk image creation, use either Disk Utility or the command-line utility hdiutil. Once a volume has been restored, it might be necessary to use the bless utility to make it bootable. (See hdiutil and bless ).
For a complete description of the imaging and restoration process, as well as tips on optimizing restores using the buffer settings, see the asr manpage.
During block-copies, use
n number of buffers instead of the default eight.
When used with -imagescan, insert only information relevant to block-copies. This makes the scan much faster, but an image scanned with -blockonly can't be block-copied; an error will occur.
During block-copies, use buffers of size
n bytes instead of the default 1000.
n can also be specified in bytes, kilobytes, megabytes, or gigabytes by appending it with b, k, m, or g, respectively.
n number of buffers specifically ...