diff --git a/bsp-files/kickstarts/pre_disk_aio.cfg b/bsp-files/kickstarts/pre_disk_aio.cfg
index 09d831dc..a45cdff7 100755
--- a/bsp-files/kickstarts/pre_disk_aio.cfg
+++ b/bsp-files/kickstarts/pre_disk_aio.cfg
@@ -82,10 +82,11 @@
 ROOTFS_SIZE=20000
 LOG_VOL_SIZE=8000
 SCRATCH_VOL_SIZE=16000
-PLATFORM_BACKUP_SIZE=10000
 BOOT_SIZE=500
 EFI_SIZE=300
 
+PLATFORM_BACKUP_SIZE=$persistent_size
+
 # The default disk size thresholds must align with the ones in
 #   config/.../sysinv/common/constants.py
 #   which are DEFAULT_SMALL_DISK_SIZE
diff --git a/bsp-files/kickstarts/pre_disk_controller.cfg b/bsp-files/kickstarts/pre_disk_controller.cfg
index 1d246027..a2a9fb46 100755
--- a/bsp-files/kickstarts/pre_disk_controller.cfg
+++ b/bsp-files/kickstarts/pre_disk_controller.cfg
@@ -5,10 +5,11 @@
 ROOTFS_SIZE=20000
 LOG_VOL_SIZE=8000
 SCRATCH_VOL_SIZE=16000
-PLATFORM_BACKUP_SIZE=10000
 BOOT_SIZE=500
 EFI_SIZE=300
 
+PLATFORM_BACKUP_SIZE=$persistent_size
+
 ROOTFS_OPTIONS="defaults"
 profile_mode=`cat /proc/cmdline |xargs -n1 echo |grep security_profile= | grep extended`
 if [ -n "$profile_mode" ]; then
diff --git a/bsp-files/kickstarts/pre_disk_setup_common.cfg b/bsp-files/kickstarts/pre_disk_setup_common.cfg
index 07b0304f..b5e48081 100644
--- a/bsp-files/kickstarts/pre_disk_setup_common.cfg
+++ b/bsp-files/kickstarts/pre_disk_setup_common.cfg
@@ -22,6 +22,10 @@ fi
 if [ -z "$rootfs_device" ]; then
     rootfs_device=$(get_disk_dev)
 fi
+if [ -z "$persistent_size" ]; then
+    # Default backup partition size in MiB
+    persistent_size=30000
+fi
 
 # Get root and boot devices
 orig_rootfs_device=$rootfs_device