On 11/02/16 20:20, John R Pierce wrote: > On 2/11/2016 5:14 AM, lejeczek wrote: >> nobody does use iscsi loopback over an lvm? > > I'm not sure what 'iscsi loopback' even means. iSCSI is > used to mount a virtual block device hosted on another > system (initiator mode) or to share a virtual block device > (target mode), while loopback is used to mount a local > file as a device, such as an .iso image of an optical disc. > > can you explain in a little more detail what you're trying > to do ? > > > whatever devices you have in your backstores (LIO implementation is the default one I believe) and then naturally in your targets, etc.. - on the same local system you can loop them back = LIO presents them again to the kernel as local scsi devices. I'm thinking, maybe multipath should be involved/deployed here? I can mount such a loopback iscsi target but I cannot use FS's uuid because - in my case first UUID comes from LVM's lv and then the same UUID comes via iscsi loopback - which makes sense for it's the same one filesystem.