...

• HowtoForge's "Using iSCSI On Debian Squeeze (Initiator And Target)": http://www.howtoforge.com/using-iscsi-on-debian-squeeze-initiator-and-target

• Open-iSCSI: http://www.open-iscsi.org/ including a README: http://www.open-iscsi.org/docs/README

• iSCSI Enterprise Target: http://iscsitarget.sourceforge.net/

Planning

Information required:

• A user name and password (for the iSCSI configuration so an arbitrary choice)
• A target (server) computer:
  • root access
  • Useful to know its IP address(es)
  • A local block device to be made available to the initiator (client) via iSCSI.  May be a file, a HDD (whole device or partition), an LVM volume or a RAID device.
• An initiator (client) computer
  • root access

Setting up the target (server)

...

The next step sets up to serve a single LVM volume, /dev/vg0/lv0.  Values that need to be changed are red.  Values that are arbitrary strings (so could be changed) are in blue.

user=someone
password=secret
local_device=/dev/vg0/lv0

...

( echo "Target iqn.$(date +%Y-%m)$backwards_fqdn:storage.lun0"
    echo "    IncomingUser $user $password"
    echo "    OutgoingUser"
    echo "    Lun 0 Path=$local_device,Type=fileio"
    echo "    Alias LUN0"
) > /etc/iet/ietd.conf

Further devices can be added by editing /etc/iet/ietd.conf, replicating and modifying the first stanza.

Setting up the initiator (client)

aptitude install open-iscsi