Description of problem:

When trying to install the OS on a system booting via iSCSI with 2 session the following error happens.

[   32.230373] systemd-fstab-generator[886]: Failed to create mount unit file /run/systemd/generator/sysroot.mount, as it already exists. Duplicate entry in /etc/fstab?
dracut-initqueue[590]: iscsistart: version 6.2.0.873-14
dracut-initqueue[590]: iscsistart: initiator reported error (15 - session exists)
dracut-initqueue[590]: iscsistart: initiator reported error (15 - session exists)
[  OK  ] Started dracut initqueue hook.
         Starting dracut pre-mount hook...
[  OK  ] Started dracut pre-mount hook.
         Mounting /sysroot...
[FAILED] Failed to mount /sysroot.
See 'systemctl status sysroot.mount' for details.


:/# cat /etc/fstab
/dev/root /sysroot auto ro,x-initrd.mount 0 0
/dev/root /sysroot auto ro,x-initrd.mount 0 0

:/# systemctl status sysroot.mount -l
sysroot.mount - /sysroot
   Loaded: loaded (/etc/fstab)
   Active: failed (Result: exit-code) since Wed 2013-10-02 02:16:52 UTC; 20min ago
    Where: /sysroot
     What: /dev/root
  Process: 925 ExecMount=/bin/mount /dev/root /sysroot -t auto -o ro,x-initrd.mount (code=exited, status=32)

Oct 02 02:16:52 localhost systemd[1]: Mounting /sysroot...
Oct 02 02:16:52 localhost mount[925]: mount: /dev/sdc is already mounted or /sysroot busy
Oct 02 02:16:52 localhost systemd[1]: sysroot.mount mount process exited, code=exited status=32
Oct 02 02:16:52 localhost systemd[1]: Failed to mount /sysroot.
Oct 02 02:16:52 localhost systemd[1]: Unit sysroot.mount entered failed state.


Version-Release number of selected component (if applicable):
systemd-207-2.el7.x86_64
dracut-033-3.el7

How reproducible:
100%

Steps to Reproduce:
1.Try to install a iSCSI boot that has 2 sessions configured

2.Installation fails with error above