Hi Andrey, This was perfect, managed to rebuild the initrd.xz file to include additional drivers by booting a VM using the ISO and then replacing the initrd.xz file on our TFTP server with the /tmp/initrd.xz file. mkdir /tmp/initrd && cd /tmp/initrd; xz -d -c -k /livemnt/boot/boot/grub/initrd.xz | cpio -i; for f in aufs aufs-x86_64; do cd /tmp/initrd/lib/modules/4.9.57-$f/kernel/drivers; mkdir block; cp -a /lib/modules/4.9.57-$f/kernel/drivers/virtio .; cp -a /lib/modules/4.9.57-$f/kernel/drivers/block/virtio_blk.ko block; cp -a /lib/modules/4.9.57-$f/kernel/drivers/block/cciss.ko block; cp -a /lib/modules/4.9.57-$f/kernel/drivers/scsi .; done cd /tmp/initrd; find . | cpio -H newc -o | xz --check=crc32 --x86 --lzma2 > /tmp/initrd.xz; Would be great if the Rescue disk could be amended to include virtio_blk.ko (VirtIO block device) and virtio_pci.ko (needed by the newer virtio_scsi.ko (VirtIO SCSI block device) driver which itself is already included). ie: Please include as a minimum: virtio_pci.ko & virtio_scsi.ko virtio_blk.ko PS: For anyone looking for TFTP instructions, they are here: https://support.kaspersky.com/15271 Regards David Herselman