[virt-tools-list] virt-install via iso

[(*^__^*)]

hi all
    I'm installing guestos on RHEL6,no X,so i connect with putty. My cli command is
 virt-install --name=node2 --arch=x86_64 --vcpus=2 --ram=1024 --os-type=linux --os-variant=rhel4 --hvm --connect=qemu:///system --network bridge:virbr0 --cdrom=/tmp/RHEL4-U4-X64-dvd.iso --disk path=/dev/mapper/vm-node3 --accelerate  --keymap=es  --nographics --extra-args='text console=tty0 utf8 console=ttyS0,115200 method=cdrom'
 It can't open console,but when i install it with cli
 virt-install -n node1 -r 1024 -f /dev/mapper/vm-node1 -s 20 --vcpus=2 --os-type linux --os-variant=rhel4 --network bridge=virbr0 --nographics --location=http://10.0.52.82:8000/rhel4 --extra-args='console=tty0 console=ttyS0,115200n8' 
It runs OK!
 Anyone found the same problem,I want know how to slove it!
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