> what should I be careful and what is the exact command to copy files system from one to the other box.
The fbackup/frecover given above by R.O. will work just fine. Filesystems simply sit inside an lvol, so if you want the same physical layout, you'll need to create the same volume group(s) and lvol(s) for the destination array. Naturally, the VG name will be different but can be changed later. Or you can rearrange the VG and lvol names and sizes but this assumes you can keep track of everything.
If you use fbackup+frecover, then use newfs for each lvol, then mount them under temporary directories and copy the files. Then verify the file and directory count with find+wc mentioned above.
With dd, you will still create the destination lvols and then for each of the volumes:
dd if=/dev/vg01/lvol1 of=/dev/vgnew01/lvol1 bs=2048k
Repeat for each lvol.
For the dd command, you'll be copying an active mountpoint and therefore the destination will need fsck to clear up incomplete pointers. For both methods, files will change during the copy so you need to understand if some files depend on others (like matching records) and resolve this with your applications -- or run the commands during a quiet maintenance period.
Bill Hassell, sysadmin
