Is this DSS V5 or V6? You could try to use one free drive if one is available as a new Volume Group then make it your default then try to get the logs, then once we know whats happening you can delete the volume group and remove the drive.
Thanks for the answers.
What i did... Attached another hdd and create vg01 on it. i made it default system volume from C-A-X extended tools. Then i could see iscsi target menu on gui instead of no system volume found error. I created another iscsi target with raid array. Now its working as it should be... I can add 1 hdd to the project expenses