Mac OS X in a Nutshell

Name

asr

Synopsis

asr -source sourcepath -target targetpath [options] asr 
-imagescan imagepath
                  

Accurately 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 from more efficiently.

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 Copy 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.

Options

-buffers n

During block-copies, use n number of buffers instead of the default eight.

-buffersize n

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.

-csumbuffers n

Use n number of buffers specifically for checksumming. By default, checksumming is performed with the same buffers used for copying.

-csumbuffersize n

Use checksum buffers of size n bytes. n can also be specified in bytes, kilobytes, megabytes, or gigabytes ...