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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Extra lsilogic SCSI controller on aarch64 causes last disk unrecognized","articleBody":"### problem\n\n### Environment\n- CloudStack Version: 4.20.1.0\n- CPU Architecture: aarch64\n- Hypervisor: KVM\n- UEFI Configuration (relevant for aarch64 VM boot, from `/etc/cloudstack/agent/uefi.properties`):\n```\n# CloudStack Agent UEFI Configuration for ARM64\n# This file configures UEFI boot support for ARM64 virtual machines\n\n# Secure boot mode with Microsoft keys\nguest.nvram.template.secure=/usr/share/AAVMF/AAVMF_VARS.ms.fd\nguest.loader.secure=/usr/share/AAVMF/AAVMF_CODE.ms.fd\n\n# Secure boot mode without Microsoft keys\nguest.nvram.template.secboot=/usr/share/AAVMF/AAVMF_VARS.fd\nguest.loader.secboot=/usr/share/AAVMF/AAVMF_CODE.secboot.fd\n\n# Standard UEFI mode (default)\nguest.nvram.template.legacy=/usr/share/AAVMF/AAVMF_VARS.fd\nguest.loader.legacy=/usr/share/AAVMF/AAVMF_CODE.fd\n\n# No secure boot mode (explicitly disabled)\nguest.nvram.template.nosecboot=/usr/share/AAVMF/AAVMF_VARS.fd\nguest.loader.nosecboot=/usr/share/AAVMF/AAVMF_CODE.no-secboot.fd\n\n# NVRAM storage path\nguest.nvram.path=/var/lib/libvirt/qemu/nvram/\n```\n\n### Problem Description\nWhen attaching multiple disks to an aarch64 VM, CloudStack incorrectly adds an **extra lsilogic SCSI controller** after allocating virtio-scsi controllers for every 7 disks. This causes the **last disk** to be unrecognized after VM reboot.\n\n**Key Evidence:** The second SCSI controller switches from `virtio-scsi` to `lsilogic` after reboot.\n\n### Reproduction Steps\n1. Deploy an aarch64 VM with 5 disks → all recognized correctly under `virtio-scsi` controller\n2. Hot-add a 6th disk while VM running → temporarily works, creates second `virtio-scsi` controller\n3. Shutdown and restart the VM → second controller becomes `lsilogic`, 6th disk disappears\n\n### Expected Behavior\nAll disks assigned to `virtio-scsi` controllers, no `lsilogic` controller added.\n\n### Actual Behavior (with Evidence)\n```xml\nAfter reboot - WRONG\n\u003ccontroller type='scsi' index='1' model='lsilogic'\u003e\nShould be:  \u003ccontroller type='scsi' index='1' model='virtio-scsi'\u003e\n```\n\n\n### Related Code\nPR #9823 (bug at the end of implementation)\n\n### Attachments\n```xml\nStep 1: Initial State (5 disks attached)\nroot@NODE159:/var/log/cloudstack/agent# virsh dumpxml i-2-971-VM  | grep controller\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='0'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='1'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='2'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='4'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='5'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='6'/\u003e\n    \u003ccontroller type='usb' index='0' model='qemu-xhci'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='scsi' index='0' model='virtio-scsi'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='0' model='pcie-root'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='virtio-serial' index='0'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='1' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='2' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='3' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='4' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='5' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='6' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='7' model='pcie-to-pci-bridge'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='8' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n      \u003caddress type='virtio-serial' controller='0' bus='0' port='1'/\u003e\n\nStep 2: Hot-add 6th disk while VM running,witch device id is 7\nroot@NODE159:/var/log/cloudstack/agent# virsh dumpxml i-2-971-VM  | grep controller\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='0'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='1'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='2'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='4'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='5'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='6'/\u003e\n      \u003caddress type='drive' controller='1' bus='0' target='0' unit='0'/\u003e\n    \u003ccontroller type='usb' index='0' model='qemu-xhci'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='scsi' index='0' model='virtio-scsi'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='scsi' index='1' model='virtio-scsi'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='0' model='pcie-root'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='virtio-serial' index='0'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='1' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='2' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='3' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='4' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='5' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='6' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='7' model='pcie-to-pci-bridge'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='8' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n      \u003caddress type='virtio-serial' controller='0' bus='0' port='1'/\u003e\nStep 3: Reboot VM\nroot@NODE159:/var/log/cloudstack/agent# virsh dumpxml i-2-971-VM  | grep controller\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='0'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='1'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='2'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='4'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='5'/\u003e\n      \u003caddress type='drive' controller='0' bus='0' target='0' unit='6'/\u003e\n      \u003caddress type='drive' controller='1' bus='0' target='0' unit='0'/\u003e\n    \u003ccontroller type='usb' index='0' model='qemu-xhci'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='scsi' index='0' model='virtio-scsi'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='0' model='pcie-root'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='scsi' index='1' model='lsilogic'\u003e    \u003c!-- BUG: Should be virtio-scsi --\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='virtio-serial' index='0'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='1' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='2' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='3' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='4' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='5' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='6' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='7' model='pcie-to-pci-bridge'\u003e\n    \u003c/controller\u003e\n    \u003ccontroller type='pci' index='8' model='pcie-root-port'\u003e\n    \u003c/controller\u003e\n      \u003caddress type='virtio-serial' controller='0' bus='0' port='1'/\u003e\nroot@NODE159:/var/log/cloudstack/agent# \n```\n\n### versions\n\n- CloudStack Version: 4.20.1.0\n- CPU Architecture: aarch64\n- Hypervisor: KVM\n\n### The steps to reproduce the bug\n\n1.Initial State 5 disks attached\n2.Hot-add 6th disk while VM running\n3.reboot VM\n...\n\n\u003cimg width=\"1483\" height=\"459\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/d662cb6b-5c97-4e76-878a-98a1d33c2245\" /\u003e\n\n\n### What to do about it?\n\n_No response_","author":{"url":"https://github.com/gw769","@type":"Person","name":"gw769"},"datePublished":"2025-11-18T09:03:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/12090/cloudstack/issues/12090"}