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

set_online $target_mdisk
target_dev_node=`cat /proc/dasd/devices | grep "$target_mdisk(ECKD)" | awk '{ print $7
}'`
source_dev_node=`cat /proc/dasd/devices | grep "$source_mdisk(ECKD)" | awk '{ print $7
}'`
wait_for_device /dev/$target_dev_node
ret_val=$?
if [ $ret_val -eq 0 ] ; then
[ -n "$VERBOSE" ] && echo "Invoking Linux command: dasdfmt -p -b 4096 -y -f
/dev/$target_dev_node"
[ -n "$VERBOSE" ] && progress="-p"
dasdfmt $progress -b 4096 -y -f /dev/$target_dev_node
[ $? -ne 0 ] && echo "Error: dasdfmt failed" && ret_val=1
fi
if [ $ret_val -eq 0 ] ; then
wait_for_device /dev/$source_dev_node
ret_val=$?
fi
if [ $ret_val -eq 0 ] ; then
[ -n "$VERBOSE" ] && \
echo "Invoking Linux command: dd bs=1M if=/dev/$source_dev_node
of=/dev/$target_dev_node"
dd bs=1M if=/dev/$source_dev_node of=/dev/$target_dev_node >/dev/null
[ $? -ne 0 ] && echo "Error: dd failed" && ret_val=1
fi
# Put the source and target devices offline
set_offline $target_mdisk
set_offline $source_mdisk
return $ret_val
}
#+--------------------------------------------------------------------------+
function link_one
# This will link one minidisk from another user id as the target minidisk
# address on the current z/VM user id with a link mode indicated by the
# 4th argument.
#
# Arg1: Source z/VM ID
# Arg2: Source minidisk virtual address
# Arg3: Target minidisk virtual address
# Arg4: Link mode (rr/w)
#+--------------------------------------------------------------------------+
{
source_id=$1
source_mdisk=$2
target_mdisk=$3
link_mode=$4
cp_cmd QUERY VIRTUAL $target_mdisk
if [ $? != 40 ]; then
cp_cmd DETACH $target_mdisk
fi
Appendix B. Source code 255