Starting from 4.0.2.1 iscsi-init is multipath ready. So far it has been tested for FC3 andRHEL4. If you test it for other distro's, please let me know. To make it work please follow thesteps below:1. Download and compile multipath-tools from http://http://christophe.varoqui.free.fr   Use latest vesrion from http://christophe.varoqui.free.fr/multipath-tools/   Please keep in mind devmap_name, multipath and kpartx must be compiled statically.2. Device-mapper should be from at least 2.6.10-rc*-udm2. For RHEL4 and FC3 I've just   compiled and replaced DM modules. You will actually need dm-mod.ko, dm-multipath.ko,   and dm-round-robin.ko3. Compile statically scsi_id. You can find the source code in hotplug package.4. Get wwid using scsi_id like this "/sbin/scsi_id -g -u -s /block/sda"   It will need for multipath.conf to provide name consistency for root devnode.5. Sync /etc/fstab with alias for wwid in multipath.conf.6. Configure your target for multiple portal groups. For NetApp filers you'll have to   enable iswt on at least two interfaces.    A modified initrd for FC3 could be like below:--bin  *devmap_name  *insmod  @hotplug -> /sbin/nash  *kpartx  @modprobe -> /sbin/nash  *multipath  *nash  *scsi_id  *udev  @udevstart -> udevdev  -console  -null  +ram  -sstty  -tty1  -tty2  -tty3  -tty4etc  udev     rules.d        multipath.rules     udev.conf  iscsi.conflib  crc32c.ko  dm-mod.ko  dm-multipath.ko  dm-round-robin.ko  ext3.ko  iscsi_init.ko  iscsi_sfnet.ko  jbd.ko  libcrc32c.ko  md5.ko  scsi_mod.ko  scsi_transport_iscsi.ko  sd_mod.ko  tg3.koloopfsproc~sbin -> binsyssysrootvar  run  tmptmp*init--IP.cfg for PXE could be like below:--TIMEOUT 50PROMPT 1DEFAULT  linux_iscsi_rootLABEL linux_iscsi_root    KERNEL vmlinuz-2.6.10-1.770_FC3smp-iscsi    APPEND root=/dev/system1 initrd=initrd-2.6.10-1.770_FC3smp-iscsi.img iscsi-if=eth0:192.168.1.10:255.255.255.0:192.168.1.1,eth1:192.168.2.10:255.255.255.0 iscsi-initiator=iqn.1987-05.com.cisco:01.26ffb046ec iscsi-target=192.168.1.2,192.168.2.2:iqn.1992-08.com.netapp:sn.16804546    LABEL disk    LOCALBOOT 0--Please keep in mind that you can achieve the same results using DHCP. In this case your IP.cfgcould be as simple as:--TIMEOUT 50PROMPT 1DEFAULT  linux_iscsi_rootLABEL linux_iscsi_root    KERNEL vmlinuz-2.6.10-1.770_FC3smp-iscsi    APPEND root=/dev/system1 initrd=initrd-2.6.10-1.770_FC3smp-iscsi.img iscsi-if=eth0,eth1    LABEL disk    LOCALBOOT 0-----------------------------------------------------Igor Feoktistov <ifeoktistov@users.sourceforge.net>