diff --git a/debian-bookworm.source.pkr.hcl b/debian-bookworm.source.pkr.hcl
index 1db54f7..b1b6cf6 100644
--- a/debian-bookworm.source.pkr.hcl
+++ b/debian-bookworm.source.pkr.hcl
@@ -34,8 +34,9 @@ source "proxmox-iso" "debian-12-bookworm-cloudinit-template" {
     disks {
         disk_size = "8G"
         format = "qcow2"
+        ssd = true
         storage_pool = "local"
-        type = "virtio"
+        type = "scsi"
     }
 
     network_adapters {
diff --git a/http/preseed.cfg b/http/preseed.cfg
index a6b4e70..56e1441 100644
--- a/http/preseed.cfg
+++ b/http/preseed.cfg
@@ -72,7 +72,7 @@ d-i clock-setup/ntp boolean true
 # but otherwise the device name must be given in traditional, non-devfs
 # format (so e.g. /dev/sda and not e.g. /dev/discs/disc0/disc).
 # For example, to use the first SCSI/SATA hard disk:
-d-i partman-auto/disk string /dev/vda
+d-i partman-auto/disk string /dev/sda
 
 # In addition, you'll need to specify the method to use.
 # The presently available methods are:
@@ -145,7 +145,7 @@ d-i grub-installer/with_other_os boolean true
 
 # Due notably to potential USB sticks, the location of the MBR can not be
 # determined safely in general, so this needs to be specified:
-d-i grub-installer/bootdev  string /dev/vda
+d-i grub-installer/bootdev  string /dev/sda
 # To install to the first device (assuming it is not a USB stick):
 #d-i grub-installer/bootdev  string default