[Qemu-devel] [Bug 744856] [NEW] can't boot when using more than 6 disks since qemu-kvm-0.13

[Andreas 'ac0v' Specht]

Public bug reported:

It's not possible to pass more than 6 disks to a guest since qemu-kvm-0.13 
(also tested with 0.14).
If I pass more than 6 disks (as shown below) the machine complains that their 
is no bootable disk,

The problem occurs with virtio and without virtio.

eg.

/usr/bin/qemu-system-x86_64  --enable-kvm -boot c   -drive
file=/dev/vgr5/fs-01,if=virtio -drive file=/dev/vgr5/fs-
01_srv_workspace,if=virtio -drive file=/dev/vgr5/fs-
01_srv_media,if=virtio -drive file=/dev/vgr5/fs-01_srv_company,if=virtio
-drive file=/dev/vgr5/fs-01_srv_tmp,if=virtio -drive file=/dev/vgr5/fs-
01_srv_download,if=virtio -drive file=/dev/vgr5/fs-
01_srv_share,if=virtio -drive file=/dev/vgr5/fs-01_srv_backup,if=virtio
-drive file=/dev/vgr5/fs-01_srv_private,if=virtio -drive file=/dev/vgr5
/fs-01_srv_build,if=virtio -drive file=/dev/vgr5/fs-01_srv_dev,if=virtio
-drive file=/dev/vgr5/fs-01_srv_backup2,if=virtio -drive file=/dev/vgr5
/fs-01_srv_ftp,if=virtio  -cpu qemu64 -smp 2  -m 4G -append
root=/dev/vda -usbdevice tablet -net
nic,macaddr=90:e6:ba:9d:00:0,model=e1000 -net
tap,ifname=tap0,script=/usr/sbin/qemu-ifup,downscript=/usr/sbin/qemu-
ifdown  -monitor unix:/var/run/kvm/fs-01/monitor,server,nowait -pidfile
/var/run/kvm/fs-01/pid  -k de -kernel
/srv/kvm/kernel/linux-2.6.38-gentoo -append root=/dev/vda -vnc :0 -name
fs-01,process=fs-01 -vga std

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/744856

Title:
  can't boot when using more than 6 disks since qemu-kvm-0.13

Status in QEMU:
  New

Bug description:
  It's not possible to pass more than 6 disks to a guest since qemu-kvm-0.13 
(also tested with 0.14).
  If I pass more than 6 disks (as shown below) the machine complains that their 
is no bootable disk,

  The problem occurs with virtio and without virtio.

  eg.

  /usr/bin/qemu-system-x86_64  --enable-kvm -boot c   -drive
  file=/dev/vgr5/fs-01,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_workspace,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_media,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_company,if=virtio -drive file=/dev/vgr5/fs-01_srv_tmp,if=virtio
  -drive file=/dev/vgr5/fs-01_srv_download,if=virtio -drive
  file=/dev/vgr5/fs-01_srv_share,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_backup,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_private,if=virtio -drive file=/dev/vgr5/fs-
  01_srv_build,if=virtio -drive file=/dev/vgr5/fs-01_srv_dev,if=virtio
  -drive file=/dev/vgr5/fs-01_srv_backup2,if=virtio -drive
  file=/dev/vgr5/fs-01_srv_ftp,if=virtio  -cpu qemu64 -smp 2  -m 4G
  -append root=/dev/vda -usbdevice tablet -net
  nic,macaddr=90:e6:ba:9d:00:0,model=e1000 -net
  tap,ifname=tap0,script=/usr/sbin/qemu-ifup,downscript=/usr/sbin/qemu-
  ifdown  -monitor unix:/var/run/kvm/fs-01/monitor,server,nowait
  -pidfile /var/run/kvm/fs-01/pid  -k de -kernel
  /srv/kvm/kernel/linux-2.6.38-gentoo -append root=/dev/vda -vnc :0
  -name fs-01,process=fs-01 -vga std