Commands similar to ioscan, makesysb

Having worked on other UNIX platform for many years, I would like to see the following features in the new release. I know some of these are already posted by other users in this group, but posting again to show that these are badly needed by many users. 

1) A tool similar to makesysb (AIX), make_recovery (HP-UX), to atleast create and restore a system image to the same hardware or to other similar hardware architecture.

 2) A simple command to rescan and add new LUNs (eg: ioscan in HPUX), without having to reboot. I am aware of   echo "- - -" > /sys/class/scsi_host/host?/scan  in linux, but this often caused I/O interruption concern about running on a live production system. In some cases, had to reboot the server for the new disk devices to show up.