mount iscsi even if not present at boot:

SUSE??

Option A (Recommended). In the /lib/udev/rules.d/64-lvm2.rules file Add the line

ACTION=="add", KERNEL=="sd*", GOTO="lvm_work"

Change the /etc/fstab file to use

/dev/mapper/vgname-lvname

instead of

/dev/vgname/lvname