upon closer investigation i discovered some details.

in the initrd of the installer and in the 
scsi-modules-3.11.0-11-generic-di_3.11.0-11.17_amd64.udeb
some necessary drivers are absent:

/lib/modules/3.11.0-11-generic/kernel/drivers/firmware/iscsi_ibft.ko
/lib/modules/3.11.0-11-generic/kernel/drivers/net/ethernet/broadcom/cnic.ko
/lib/modules/3.11.0-11-generic/kernel/drivers/scsi/bnx2i/bnx2i.ko
/lib/modules/3.11.0-11-generic/kernel/drivers/uio/uio.ko

/etc/iscsi/initiatorname.iscsi is detected incorrectly. it should be taken from 
Emulex CNA adapter.
please note that a blade may have some adapters so some different initiator 
names may exist simultaneously.
these names in a form of "iface.initiatorname = ..." may be written in files 
describing corresponding interfaces in /etc/iscsi/ifaces/*


i managed to connect iscsi disk manually and then to install OS on it.

i went to "Execute a shell", copied drivers mentioned above, run
commands

# modprobe iscsi_tcp
# modprobe bnx2i

# iscsiadm -m iface
# iscsiadm -m fw -l

after that i returned to installer. OS was installed successfully.

but open-iscsi scripts which are used when creating initrd and also during OS 
start are not intended to work with
Emulex CNA adapter. in these scripts some additional modules should be loaded 
and some iscsiadm commands
should be run.

also please note that above iscsi LUNs connected in such a way
multipath-tools and multipath-tools-boot should work.

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https://bugs.launchpad.net/bugs/1238169

Title:
  13.04 server: Fujitsu BX900/DX90 installation problem

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