Comment 18 for bug 1832859

(In reply to Renaud Métrich from comment #4)
> Hi Peter,
>
> Could you explain why blk-availability is needed when using multipath or
> iscsi?
> With systemd ordering dependencies in units, is that really needed?

It is still needed because otherwise there wouldn't be anything else to properly deactivate the stack. Even though, the blk-availability.service with blkdeactivate call is still not perfect, it's still better than nothing and letting systemd to shoot down the devices on its own within its "last-resort" device deactivation loop that happens in shutdown initramfs (here, the iscsi/fcoe and all the other devices are already disconnected anyway, so anything else on top can't be properly deactivated).

We've just received related report on github too (https://github.com/lvmteam/lvm2/issues/18).

I'm revisiting this problem now. The correct solution requires more patching - this part is very fragile at the moment (...easy to break other functionality).