Old BIOS: start partition at specific place

Some BIOSes dont't boot from partitions starting at sector 1024.
Some are even more peculiar and only start from sector 63.
This patch adds an option for the binary_hdd target to manually
configure the partition start.

2 files changed, 23 insertions, 3 deletions

diff --git a/scripts/build/binary_hdd b/scripts/build/binary_hdd
index c958aff9a..0ffb20a7f 100755
--- a/scripts/build/binary_hdd
+++ b/scripts/build/binary_hdd
@@ -172,7 +172,12 @@ esac
 case "${LB_BUILD_WITH_CHROOT}" in
 	true)
 		Chroot chroot "parted -s ${FREELO} mklabel ${PARTITION_TABLE_TYPE}" || true
-		Chroot chroot "parted -a optimal -s ${FREELO} mkpart primary ${PARTITION_TYPE} 0% 100%" || true
+		if [ "x${LB_HDD_PARTITION_START}" = "x" ]; then
+			Chroot chroot "parted -a optimal -s ${FREELO} mkpart primary ${PARTITION_TYPE} 0% 100%" || true
+		else
+                        Echo_message "using partition start at ${LB_HDD_PARTITION_START}"
+			Chroot chroot "parted -s ${FREELO} mkpart primary ${PARTITION_TYPE} ${LB_HDD_PARTITION_START} 100%" || true
+		fi
 		Chroot chroot "parted -s ${FREELO} set 1 boot on" || true
 		Chroot chroot "parted -s ${FREELO} set 1 lba off" || true
 
@@ -184,7 +189,12 @@ case "${LB_BUILD_WITH_CHROOT}" in
 
 	false)
 		parted -s ${FREELO} mklabel ${PARTITION_TABLE_TYPE} || true
-		parted -a optimal -s ${FREELO} mkpart primary ${PARTITION_TYPE} 0% 100% || true
+		if [ "x${LB_HDD_PARTITION_START}" = "x" ]; then
+			parted -a optimal -s ${FREELO} mkpart primary ${PARTITION_TYPE} 0% 100% || true
+		else
+                        Echo_message "using partition start at ${LB_HDD_PARTITION_START}"
+			parted -s ${FREELO} mkpart primary ${PARTITION_TYPE} ${LB_HDD_PARTITION_START} 100% || true
+		fi
 		parted -s "${FREELO}" set 1 boot on || true
 		parted -s "${FREELO}" set 1 lba off || true
 
diff --git a/scripts/build/config b/scripts/build/config
index fbe986588..e5810b45d 100755
--- a/scripts/build/config
+++ b/scripts/build/config
@@ -69,6 +69,7 @@ USAGE="${PROGRAM}   [--apt apt|aptitude]\n\
 \t    [--isohybrid-options OPTION|\"OPTIONS\"]\n\
 \t    [--hdd-label LABEL]\n\
 \t    [--hdd-size MB]\n\
+\t    [--hdd-partition-start [parted unit, e.g. 63s]\n\
 \t    [--iso-application NAME]\n\
 \t    [--iso-preparer NAME]\n\
 \t    [--iso-publisher NAME]\n\
@@ -139,7 +140,7 @@ Local_arguments ()
 		security:,updates:,backports:,binary-filesystem:,binary-images:,
 		apt-indices:,bootappend-install:,bootappend-live:,bootappend-live-failsafe:,bootloaders:,checksums:,compression:,config:,zsync:,build-with-chroot:,
 		debian-installer:,debian-installer-distribution:,debian-installer-preseedfile:,debian-installer-gui:,
-		grub-splash:,isohybrid-options:,hdd-label:,hdd-size:,iso-application:,iso-preparer:,iso-publisher:,
+		grub-splash:,isohybrid-options:,hdd-label:,hdd-size:,hdd-partition-start:,iso-application:,iso-preparer:,iso-publisher:,
 		iso-volume:,jffs2-eraseblock:,memtest:,net-root-filesystem:,net-root-mountoptions:,
 		net-root-path:,net-root-server:,net-cow-filesystem:,net-cow-mountoptions:,net-cow-path:,
 		net-cow-server:,net-tarball:,firmware-binary:,firmware-chroot:,swap-file-path:,swap-file-size:,
@@ -566,6 +567,11 @@ Local_arguments ()
 				shift 2
 				;;
 
+			--hdd-partition-start)
+				LB_HDD_PARTITION_START="${2}"
+				shift 2
+				;;
+
 			--iso-application)
 				LB_ISO_APPLICATION="${2}"
 				shift 2
@@ -1198,6 +1204,10 @@ LB_HDD_LABEL="${LB_HDD_LABEL}"
 # (Default: ${LB_HDD_SIZE})
 LB_HDD_SIZE="${LB_HDD_SIZE}"
 
+# \$LB_HDD_PARTITION_START: set start of partition for the hdd target for BIOSes that expect a specific boot partition start (e.g. "63s"). If empty, use optimal layout.
+# (Default: ${LB_HDD_PARTITION_START})
+LB_HDD_PARTITION_START="${LB_HDD_PARTITION_START}"
+
 # \$LB_ISO_APPLICATION: set iso author
 # (Default: ${LB_ISO_APPLICATION})
 LB_ISO_APPLICATION="${LB_ISO_APPLICATION}"