You can create a loopback or iSCSI file using dd. The following example creates a file with an initial size o 0 bytes and a allocated size of 8Gb.
dd if=/dev/zero of=LUN3 bs=1000 count=0 seek=$[1000*1000*8]
Mount the file using the following command.
mount -o loop /path/to/file /path/to/mountpoint
Display all iSCSI targets on give ip-address.
iscsiadm --mode discovery --type sendtargets --portal 192.168.1.250
Connect to a give target.
iscsiadm --mode node --targetname iqn.1994-04.org.netbsd.iscsi-target:target0 --portal 192.168.1.250:3260 --login
Close connection to a iSCSI target.
iscsiadm --mode node --targetname iqn.1994-04.org.netbsd.iscsi-target:target0 --portal 192.168.1.250:3260 --logout
Mount a iSCSI disk with lable ISCSI-0 on directory ‘/mnt/iscsi-0’.
mount /dev/disk/by-label/ISCSI-0 /mnt/iscsi-0
Display node records.
iscsiadm --mode node
iscsiadm --mode node --targetname iqn.1994-04.org.netbsd.iscsi-target:target0 --portal 192.168.1.250:3260