To ensure that your HBA is always passed through under the same PCI ID, you should define the PCIe passthrough with a stable device ID. You can do this as follows:
1. determine device ID (Vendor & Device)
Use the following command to determine the unique device ID:
lspci -nn | grep -i sas
If you cannot find your HBA, you can also search for storage or SATA devices in general:
lspci -nn | grep -i "storage\|sata\|sas\|hba"
This will give you an output like:
07:00.0 Serial Attached SCSI controller [1000:0072] (rev 03)
Where 1000:0072 is the vendor:device ID.
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2. bind device permanently
Open the file /etc/modprobe.d/vfio.conf or create it if it does not exist:
nano /etc/modprobe.d/vfio.conf
Add the following line to bind the device to the vfio-pci driver:
options vfio-pci ids=1000:0072
(If your HBA has a different ID, replace 1000:0072 accordingly).
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3. update initramfs
You should then regenerate the initramfs so that the changes are applied:
update-initramfs -u
If you are using Proxmox with ZFS, this command may be necessary:
update-initramfs -u -k all
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4. set blacklist for other drivers
To make sure that your HBA is not taken over by another driver, add the following to /etc/modprobe.d/blacklist.conf:
blacklist mpt3sas
blacklist megaraid_sas
If your HBA is a different type, you may need to use other drivers such as ahci or
