The initiator is able to connect to and log in to the target and the system sees the disk, but you are unable to install the OS.
After successful OS installation, the server will not boot Linux from the iSCSI target.
Check the RBSU settings for the adapter that is connected to the target. On some servers and with some versions of the BIOS, you may have to enable iSCSI boot or modify the boot controller order.
On some BL685c servers with more than 4 Gb of memory, the system fails to finish the boot sequence after a SLES 10 install.
Add the parameter "numa=off" to the list of parameters given for "Boot options" or in the PXE configuration file, depending on the type of install.