diff --git a/efiboot/loader/entries/01-archiso-x86_64-linux.conf b/efiboot/loader/entries/01-archiso-x86_64-linux.conf
index d59262f..0d10611 100644
--- a/efiboot/loader/entries/01-archiso-x86_64-linux.conf
+++ b/efiboot/loader/entries/01-archiso-x86_64-linux.conf
@@ -3,4 +3,4 @@ linux   /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 initrd  /%INSTALL_DIR%/boot/intel-ucode.img
 initrd  /%INSTALL_DIR%/boot/amd-ucode.img
 initrd  /%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL%
+options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G
diff --git a/efiboot/loader/entries/02-archiso-x86_64-speech-linux.conf b/efiboot/loader/entries/02-archiso-x86_64-speech-linux.conf
index 06f5466..c3a5e16 100644
--- a/efiboot/loader/entries/02-archiso-x86_64-speech-linux.conf
+++ b/efiboot/loader/entries/02-archiso-x86_64-speech-linux.conf
@@ -3,4 +3,4 @@ linux   /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 initrd  /%INSTALL_DIR%/boot/intel-ucode.img
 initrd  /%INSTALL_DIR%/boot/amd-ucode.img
 initrd  /%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% accessibility=on
+options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G accessibility=on
diff --git a/efiboot/loader/entries/03-archiso-x86_64-ram-linux.conf b/efiboot/loader/entries/03-archiso-x86_64-ram-linux.conf
index 9c7a51a..b645b3b 100644
--- a/efiboot/loader/entries/03-archiso-x86_64-ram-linux.conf
+++ b/efiboot/loader/entries/03-archiso-x86_64-ram-linux.conf
@@ -3,4 +3,4 @@ linux   /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 initrd  /%INSTALL_DIR%/boot/intel-ucode.img
 initrd  /%INSTALL_DIR%/boot/amd-ucode.img
 initrd  /%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% copytoram
+options archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G copytoram
diff --git a/syslinux/archiso_pxe-linux.cfg b/syslinux/archiso_pxe-linux.cfg
index e8c9a7b..015e019 100644
--- a/syslinux/archiso_pxe-linux.cfg
+++ b/syslinux/archiso_pxe-linux.cfg
@@ -6,7 +6,7 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, NBD)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% archiso_nbd_srv=${pxeserver} checksum verify
+APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% archiso_nbd_srv=${pxeserver} checksum verify cow_spacesize=1G
 SYSAPPEND 3
 
 LABEL arch64_nfs
@@ -17,7 +17,7 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, NFS)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archiso_nfs_srv=${pxeserver}:/run/archiso/bootmnt checksum verify
+APPEND archisobasedir=%INSTALL_DIR% archiso_nfs_srv=${pxeserver}:/run/archiso/bootmnt checksum verify cow_spacesize=1G
 SYSAPPEND 3
 
 LABEL arch64_http
@@ -28,5 +28,5 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, HTTP)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archiso_http_srv=http://${pxeserver}/ checksum verify
+APPEND archisobasedir=%INSTALL_DIR% archiso_http_srv=http://${pxeserver}/ checksum verify cow_spacesize=1G
 SYSAPPEND 3
diff --git a/syslinux/archiso_sys-linux.cfg b/syslinux/archiso_sys-linux.cfg
index 0d85fcc..1f35178 100644
--- a/syslinux/archiso_sys-linux.cfg
+++ b/syslinux/archiso_sys-linux.cfg
@@ -6,7 +6,7 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, BIOS)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL%
+APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G
 
 # Accessibility boot option
 LABEL arch64speech
@@ -17,7 +17,7 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, BIOS) with ^speech
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% accessibility=on
+APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G accessibility=on
 
 # Copy to RAM boot option
 LABEL arch64ram
@@ -28,4 +28,4 @@ ENDTEXT
 MENU LABEL Arch Linux install medium (x86_64, BIOS, Copy to RAM)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
-APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% copytoram
+APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% cow_spacesize=1G copytoram