[libvirt] how to pin disk order when adding SATA disk with virt-manager ?

Hi - this is my first post to this list - sorry if this is a newbie question, but: I want to mount 7 LVM disk volumes under my guest : Physical Host Volume: Guest Device: Guest FS: /dev/mapper/VG_A-vol1 : /dev/sda : /root file system /dev/mapper/VG_S-swap2 : swap : swap partition /dev/mapper/VG_C-vol3 : /dev/sdc : /home file system /dev/mapper/VG_G-vol7 : /dev/sdg : /x some necessary other storage I am booting with the "Direct Boot" option and kernel command line containing "root=/dev/sda" - ie. there HAS to be some particular /dev/sdX where X is the virtual order of the disks on the virtual SATA bus / device minor number to letter mapping . Every time I add a new volume via the virt-manager the ordering of ALL disks change , and I must manually discover which drive letter ('a-g' in /dev/sd[a-g]) maps to which disk , even though the ordering as shown in the GUI remains the same - ie. when I click on the 'SATA Disk 1' icon in the virt-manager 'Details...' tab, it still shows the correct LVM is associated with Disk 1, but the system does not boot because what was '/dev/sda' is now '/dev/sdb' . Is this a bug ? Can I request a "New Feature" which would allow me to specify the "Bus Sequence Number" in the Virtual Disk panel (where I currently can specify Source Path, Disk Bus, Advanced Options etc... ) - surely you could let users map disks to devices in a way that does not change with each new disk added ? Anyway, that's my 2 cents on $subject . Any thoughts / suggestions gratefully received . Thanks & Regards , Jason