fix: added some extra details

docs/doc-clone-and-restore-coreos.md

@@ -7,7 +7,7 @@ sudo dd if=/dev/old of=/dev/backup status=progress
 
 ### **Step 2 - clone beginning of old disk to new**
 ```
-sudo dd if=/dev/old of=/dev/backup status=progress count=1000Mib
+sudo dd if=/dev/old of=/dev/backup status=progress count=1000 bs=1M
 ```
 
 ### **Step 3 - verify and modify disk partitions**
@@ -74,11 +74,25 @@ mount /dev/old4 /mnt/old
 mount /dev/new4 /mnt/new
 ```
 copy:
+
+with -n flag can run as dry-run
+```
+rsync -aAXHvn --numeric-ids /source/ /destination/
+```
+
 ```
 rsync -aAXHv --numeric-ids /source/ /destination/
 ```
 
 ### **Step 6 - Set correct UUID for new partition 4**
+to set uuid with xfs_admin you must unmount first
+
+unmount old devices
+```
+umount /mnt/new
+umount /mnt/old
+```
+
 to set correct uuid for partition 4
 ```
 blkid /dev/old4
@@ -117,11 +131,3 @@ blkid /dev/sda* | grep UUID=
 blkid /dev/sdc* | grep UUID=
 ```
 
-## **Step 8 - Unmount devices and Finalize job**
-unmount old devices
-```
-umount /mnt/new
-umount /mnt/old
-```
-
-shutdown swap disk and verify it worked