I tried to mirroring an existing disks on a new disks with less space. It is very important that the file structure, attributes and ACL's are exact as on the source disk.
For this I tried
robocopy $sourceDisk $destinationDisk /mir /XD "System Volume Information" "`$RECYCLE.BIN" /copyall /r:1 /NP /NFL
That command copies all folders and files with attributes, ACL's, etc. over to the destination disk, except for the compress-attribute, i.e. files or folders which are compressed on the source disk are on the destination disk not longer compressed. This attribute is missing.
Is there an option for robocopy to do this (I didn't find it). Or are there existing other approaches to make an exact copy of an disk or file structure to another disk?