The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM

There are many ways to clone Linux under z/VM. The steps in this section are just one way to
do it. The following assumptions are made based on what you have done so far:
► The source user ID, RH6GOLD in this example, has a root file system on LVM, located on
minidisks 100-101.
► The target user ID, LINUX01 in this example, has identically sized mindisks 100-101.
► The vmcp command is available to issue z/VM CP commands
► The z/VM FLASHCOPY command can be used but if you don’t have that support, the Linux
dd command will work.
Given these assumptions, one set of steps that can be used to clone a system is as follows:
1. Link the source disks read-only.
2. Link the target disks read/write.
3. Copy the source to the target disk with FLASHCOPY or the Linux dd command.
4. Detach the source disks.
5. Bring the newly copied LVM online.
6. Mount the newly copied root file system.
7. Modify the networking information on the target system.
8. Detach the target disks.
9. IPL the target system.
10.Modify the SSH keys on the target system.
Link the source and target disks
Start an SSH session to the cloner as root.
The source disks, RH6GOLD 100-101, are linked read-only as virtual devices 1100 and 1101 with
the CP LINK command:
# vmcp link rh6gold 100 1100 rr
# vmcp link rh6gold 101 1101 rr
The target disks, LINUX01 100-101, are linked multi-read (read/write if no other user ID has
write access) as virtual devices 2100 and 2101:
# vmcp link linux01 100 2100 mr
# vmcp link linux01 101 2101 mr
Copy the source to the target disk with FLASHCOPY
The two disks are copied with the CP FLASHCOPY command:
# vmcp flashcopy 1100 0 end to 2100 0 end
Command complete: FLASHCOPY 1100 0 END TO 2100 0 END
# vmcp flashcopy 1101 0 end to 2101 0 end
Command complete: FLASHCOPY 1101 0 END TO 2101 0 END
If you do not have the FLASHCOPY feature, see the next shaded box.
148 The Virtualization Cookbook for RHEL 6