device: 0.693
graphic: 0.520
socket: 0.480
network: 0.449
vnc: 0.445
semantic: 0.395
performance: 0.383
KVM: 0.282
permissions: 0.221
PID: 0.204
boot: 0.160
debug: 0.145
files: 0.113
other: 0.061

Unable to set scsi drive serial if it contains spaces.

I am virtualzing a physical server for which I need to set the SCSI/SATA drive serial.  It is comprised of 12 " " spaces then 8 letter/digits.  If I exclude the spaces, the drive serial is not accurate.  If I include the spaces I get the following error.

error: Failed to start domain test1
error: internal error: driver serial '            ABCD1234' contains unsafe characters

virsh edit
Centos 7.0
3.19.0-1.el7.elrepo.x86_64
QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-60.el7.centos.7), Copyright (c) 2003-2008 Fabrice Bellard

This error message comes from libvirt, not from QEMU, so please report the error there if it still persists: https://libvirt.org/bugs.html