tcp-dw commented on issue #7490:
URL: https://github.com/apache/cloudstack/issues/7490#issuecomment-2401954711
In my case having OS type to "Other PV Virtio-SCSI" on the Windows VM,
after adding 8 data disks (9 with root disk) I end up to the following domain
xml:
` <disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yc' index='10'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-10-storage'/>
<nodename type='format' name='libvirt-10-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sda' bus='scsi'/>
<serial>3a07b614d1704f50be96</serial>
<alias name='scsi0-0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
<privateData>
<qom name='scsi0-0-0-0'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yp' index='9'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-9-storage'/>
<nodename type='format' name='libvirt-9-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdb' bus='scsi'/>
<serial>9fe7994d35f044b5a37a</serial>
<alias name='scsi0-0-0-1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
<privateData>
<qom name='scsi0-0-0-1'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yq' index='8'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-8-storage'/>
<nodename type='format' name='libvirt-8-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdc' bus='scsi'/>
<serial>5f9c8bba843046338646</serial>
<alias name='scsi0-0-0-2'/>
<address type='drive' controller='0' bus='0' target='0' unit='2'/>
<privateData>
<qom name='scsi0-0-0-2'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yx' index='7'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-7-storage'/>
<nodename type='format' name='libvirt-7-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sde' bus='scsi'/>
<serial>0f7dee19248e41f69782</serial>
<alias name='scsi0-0-0-4'/>
<address type='drive' controller='0' bus='0' target='0' unit='4'/>
<privateData>
<qom name='scsi0-0-0-4'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yo' index='6'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-6-storage'/>
<nodename type='format' name='libvirt-6-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdf' bus='scsi'/>
<serial>6c0820647f4b4daca6b8</serial>
<alias name='scsi0-0-0-5'/>
<address type='drive' controller='0' bus='0' target='0' unit='5'/>
<privateData>
<qom name='scsi0-0-0-5'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yt' index='5'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-5-storage'/>
<nodename type='format' name='libvirt-5-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdg' bus='scsi'/>
<serial>0c03146a946f4f989e16</serial>
<alias name='scsi0-0-0-6'/>
<address type='drive' controller='0' bus='0' target='0' unit='6'/>
<privateData>
<qom name='scsi0-0-0-6'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4y1' index='4'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-4-storage'/>
<nodename type='format' name='libvirt-4-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdh' bus='scsi'/>
<serial>709bd8ed34a743dd81d5</serial>
<alias name='scsi1-0-0'/>
<address type='drive' controller='1' bus='0' target='0' unit='0'/>
<privateData>
<qom name='scsi1-0-0'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yu' index='3'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-3-storage'/>
<nodename type='format' name='libvirt-3-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdi' bus='scsi'/>
<serial>287f17c5425841f0a127</serial>
<alias name='scsi1-0-1'/>
<address type='drive' controller='1' bus='0' target='0' unit='1'/>
<privateData>
<qom name='scsi1-0-1'/>
</privateData>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='io_uring'
discard='unmap'/>
<source dev='/dev/storpool-byid/zkr.b.t4yw' index='2'>
<privateData>
<nodenames>
<nodename type='storage' name='libvirt-2-storage'/>
<nodename type='format' name='libvirt-2-format'/>
</nodenames>
</privateData>
</source>
<backingStore/>
<target dev='sdj' bus='scsi'/>
<serial>cdd42a01e7454e89b788</serial>
<alias name='scsi1-0-2'/>
<address type='drive' controller='1' bus='0' target='0' unit='2'/>
<privateData>
<qom name='scsi1-0-2'/>
</privateData>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu'/>
<target dev='sdd' bus='sata'/>
<readonly/>
<alias name='sata0-0-3'/>
<address type='drive' controller='0' bus='0' target='0' unit='3'/>
<privateData>
<qom name='sata0-0-3'/>
</privateData>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<driver queues='2'/>
<alias name='scsi0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09'
function='0x0'/>
</controller>
<controller type='sata' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pcie-root'>
<alias name='pcie.0'/>
</controller>
<controller type='scsi' index='1' model='lsilogic'>
<alias name='scsi1'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x01'
function='0x0'/>
</controller>`
Windows detects the 6 first disks attached to virtio-scsi controller #0 but
not the rest, because they are attached on lsilogic controller #1.
A possible workaround might be to use agent transformation hook to change
that behavior but it may be more proper to fix it in the code.
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