[HD2 Android NAND Development] HypoTurtle:
Is this problems with 4a? I'll help if I can (don't have a working HD2 atm so can't see the problem for myself). A boot partition size check I guess would be beneficial for magldr (only way I can think of doing that without a device to experiment on is to dump_image the boot partition and check the size of the resulting file). Can you post the aroma and boot (currently d/ling 4a but it's taking a while).

For the boot partition check:

#!/sbin/sh

echo "bootloader=MAGLDR" > /tmp/nfo.prop
output=`grep -i "clk" /proc/cmdline`
if [ -n "${output}" ]; then
echo "bootloader=cLK" > /tmp/nfo.prop
fi

output=`grep -i "haret" /proc/cmdline`
if [ -n "${output}" ]; then
echo "bootloader=HaRet" > /tmp/nfo.prop
fi

bloader=`grep -i "MAGLDR" /tmp/nfo.prop`
dump_image boot /tmp/bootpart.img
bootsize=`du -sh /tmp/bootpart.img | cut -d 'M' -f "1" `
if [ -n "${bloader}" ]; then
neededsize=11
else
neededsize=5
fi
if [ "${bootsize}" -lt "${neededsize}" ]; then
echo "boot partition is not big enough exiting"
echo "boottoosmall" > /tmp/bootsize.txt
exit 0
fi

dump_image should be available in all recoveries (I think).

My thinking when writing this script was to have updater-script being something like this:

###
#
# AROMA Installer
# (C) 2011-2012 by Ahmad Amarullah
# amarullz - xda-developers
#
###
#
# AROMA Installer Script for NexusHD2 ROM
# (C) 2012-2014 by tytung - xda-developers (tytung @ gmail.com)
#
# ( modded by macs18max added functionality to flash NativeSD boot image in cLK )
# ( modded by macs18max add 6MB to magldr ramdisk for 3.0.xx kernel)
#
# Note: If using these code below please do not remove the mentioned credits above
###

ui_print("------------------------------------------------");
ui_print(" KitKat-CM-11.0 ROM ");
ui_print("------------------------------------------------");

################
# NAND Install #
################

if file_getprop("/tmp/aroma/installtype.prop", "selected.1") == "1" then

ui_print("@ Installing to NAND...");
ui_print("@ Mounting NAND partitions...");

format("yaffs2", "MTD", "boot");
format("yaffs2", "MTD", "system");

mount("yaffs2", "MTD", "boot", "/boot");
mount("yaffs2", "MTD", "system", "/system");
mount("yaffs2", "MTD", "userdata", "/data");

# Wipe Dalvik-Cache
if file_getprop("/tmp/aroma/mods.prop", "selected.2") == "1" then
ui_print("@ Wiping Dalvik-Cache...");
delete_recursive("/data/dalvik-cache");
ui_print(" Dalvik-Cache wiped.");
endif;

# Wipe Data/Factory Reset
if file_getprop("/tmp/aroma/mods.prop", "selected.2") == "2" then
ui_print("@ Wiping Data/Factory Reset...");
unmount("/data");
format("yaffs2", "MTD", "userdata");
mount("yaffs2", "MTD", "userdata", "/data");
ui_print(" Data wiped.");
endif;

show_progress(0.9, 1400);
ui_print("@ Copying files...");
package_extract_dir("system", "/system");
# package_extract_dir("data", "/data");
show_progress(0.1, 5);
endif;

package_extract_file("boot", "/tmp");
set_perm(0, 0, 0755, "/tmp/ramdiskscript.sh");
if file_getprop("/tmp/aroma/installtype.prop", "selected.1") == "1" then
run_program("/tmp/ramdiskscript.sh", "NAND", "CM11MACS");
endif;
if file_getprop("/tmp/aroma/installtype.prop", "selected.1") == "2" then
run_program("/tmp/ramdiskscript.sh", "DataOnEXT", "CM11MACS");
endif;
if file_getprop("/tmp/aroma/installtype.prop", "selected.1") == "3" then
run_program("/tmp/ramdiskscript.sh", "NativeSD", "CM11MACS");
endif;
if file_getprop("/tmp/aroma/installtype.prop", "selected.1") == "4" then
run_program("/tmp/ramdiskscript.sh", "DirectSD", "CM11MACS");
endif;

######################
# Softkeys Selection #
######################

ui_print("@ Setting Softkeys...");
if file_getprop("/tmp/aroma/mods.prop", "selected.1") == "1" then

package_extract_file("mods/enable_softkeys.sh", "/tmp/enable_softkeys.sh");
set_perm(0, 0, 755, "/tmp/enable_softkeys.sh");
run_program("/tmp/enable_softkeys.sh");
ui_print(" Softkeys enabled.");

endif;

if file_getprop("/tmp/aroma/mods.prop", "selected.1") == "2" then

package_extract_file("mods/disable_softkeys.sh", "/tmp/disable_softkeys.sh");
set_perm(0, 0, 755, "/tmp/disable_softkeys.sh");
run_program("/tmp/disable_softkeys.sh");
ui_print(" Softkeys disabled.");

endif;

################################
# ROM Symlinks and Permissions #
################################

ui_print("@ Setting symlinks and permissions...");
ui_print(" Setting symlinks...");
symlink("../xbin/su", "/system/bin/su");
symlink("Roboto-Bold.ttf", "/system/fonts/DroidSans-Bold.ttf");
symlink("Roboto-Regular.ttf", "/system/fonts/DroidSans.ttf");
symlink("busybox", "/system/xbin/[", "/system/xbin/[[",
"/system/xbin/adjtimex", "/system/xbin/arp", "/system/xbin/ash",
"/system/xbin/awk", "/system/xbin/base64", "/system/xbin/basename",
"/system/xbin/bbconfig", "/system/xbin/blkid", "/system/xbin/blockdev",
"/system/xbin/brctl", "/system/xbin/bunzip2", "/system/xbin/bzcat",
"/system/xbin/bzip2", "/system/xbin/cal", "/system/xbin/cat",
"/system/xbin/catv", "/system/xbin/chattr", "/system/xbin/chgrp",
"/system/xbin/chmod", "/system/xbin/chown", "/system/xbin/chroot",
"/system/xbin/clear", "/system/xbin/cmp", "/system/xbin/comm",
"/system/xbin/cp", "/system/xbin/cpio", "/system/xbin/crond",
"/system/xbin/crontab", "/system/xbin/cut", "/system/xbin/date",
"/system/xbin/dc", "/system/xbin/dd", "/system/xbin/depmod",
"/system/xbin/devmem", "/system/xbin/df", "/system/xbin/diff",
"/system/xbin/dirname", "/system/xbin/dmesg", "/system/xbin/dnsd",
"/system/xbin/dos2unix", "/system/xbin/du", "/system/xbin/echo",
"/system/xbin/ed", "/system/xbin/egrep", "/system/xbin/env",
"/system/xbin/expand", "/system/xbin/expr", "/system/xbin/false",
"/system/xbin/fbsplash", "/system/xbin/fdisk", "/system/xbin/fgrep",
"/system/xbin/find", "/system/xbin/flash_lock",
"/system/xbin/flash_unlock", "/system/xbin/flashcp",
"/system/xbin/flock", "/system/xbin/fold", "/system/xbin/free",
"/system/xbin/freeramdisk", "/system/xbin/fstrim", "/system/xbin/fsync",
"/system/xbin/ftpget", "/system/xbin/ftpput", "/system/xbin/fuser",
"/system/xbin/getopt", "/system/xbin/grep", "/system/xbin/groups",
"/system/xbin/gunzip", "/system/xbin/gzip", "/system/xbin/halt",
"/system/xbin/head", "/system/xbin/hexdump", "/system/xbin/id",
"/system/xbin/ifconfig", "/system/xbin/inetd", "/system/xbin/insmod",
"/system/xbin/install", "/system/xbin/ionice", "/system/xbin/iostat",
"/system/xbin/ip", "/system/xbin/kill", "/system/xbin/killall",
"/system/xbin/killall5", "/system/xbin/less", "/system/xbin/ln",
"/system/xbin/losetup", "/system/xbin/ls", "/system/xbin/lsattr",
"/system/xbin/lsmod", "/system/xbin/lsusb", "/system/xbin/lzcat",
"/system/xbin/lzma", "/system/xbin/lzop", "/system/xbin/lzopcat",
"/system/xbin/man", "/system/xbin/md5sum", "/system/xbin/mesg",
"/system/xbin/mkdir", "/system/xbin/mke2fs", "/system/xbin/mkfifo",
"/system/xbin/mkfs.ext2", "/system/xbin/mkfs.vfat",
"/system/xbin/mknod", "/system/xbin/mkswap", "/system/xbin/mktemp",
"/system/xbin/modinfo", "/system/xbin/modprobe", "/system/xbin/more",
"/system/xbin/mount", "/system/xbin/mountpoint", "/system/xbin/mpstat",
"/system/xbin/mv", "/system/xbin/nanddump", "/system/xbin/nandwrite",
"/system/xbin/nbd-client", "/system/xbin/netstat", "/system/xbin/nice",
"/system/xbin/nohup", "/system/xbin/nslookup", "/system/xbin/ntpd",
"/system/xbin/od", "/system/xbin/patch", "/system/xbin/pgrep",
"/system/xbin/pidof", "/system/xbin/ping", "/system/xbin/pipe_progress",
"/system/xbin/pkill", "/system/xbin/pmap", "/system/xbin/poweroff",
"/system/xbin/printenv", "/system/xbin/printf", "/system/xbin/ps",
"/system/xbin/pstree", "/system/xbin/pwd", "/system/xbin/pwdx",
"/system/xbin/rdev", "/system/xbin/readlink", "/system/xbin/realpath",
"/system/xbin/renice", "/system/xbin/reset", "/system/xbin/resize",
"/system/xbin/rev", "/system/xbin/rm", "/system/xbin/rmdir",
"/system/xbin/rmmod", "/system/xbin/route", "/system/xbin/run-parts",
"/system/xbin/rx", "/system/xbin/sed", "/system/xbin/seq",
"/system/xbin/setconsole", "/system/xbin/setserial",
"/system/xbin/setsid", "/system/xbin/sh", "/system/xbin/sha1sum",
"/system/xbin/sha256sum", "/system/xbin/sha3sum",
"/system/xbin/sha512sum", "/system/xbin/sleep", "/system/xbin/sort",
"/system/xbin/split", "/system/xbin/stat", "/system/xbin/strings",
"/system/xbin/stty", "/system/xbin/sum", "/system/xbin/swapoff",
"/system/xbin/swapon", "/system/xbin/sync", "/system/xbin/sysctl",
"/system/xbin/tac", "/system/xbin/tail", "/system/xbin/tar",
"/system/xbin/taskset", "/system/xbin/tee", "/system/xbin/telnet",
"/system/xbin/telnetd", "/system/xbin/test", "/system/xbin/tftp",
"/system/xbin/tftpd", "/system/xbin/time", "/system/xbin/timeout",
"/system/xbin/top", "/system/xbin/touch", "/system/xbin/tr",
"/system/xbin/traceroute", "/system/xbin/true", "/system/xbin/ttysize",
"/system/xbin/tune2fs", "/system/xbin/umount", "/system/xbin/uname",
"/system/xbin/uncompress", "/system/xbin/unexpand", "/system/xbin/uniq",
"/system/xbin/unix2dos", "/system/xbin/unlzma", "/system/xbin/unlzop",
"/system/xbin/unxz", "/system/xbin/unzip", "/system/xbin/uptime",
"/system/xbin/usleep", "/system/xbin/uudecode", "/system/xbin/uuencode",
"/system/xbin/vi", "/system/xbin/watch", "/system/xbin/wc",
"/system/xbin/wget", "/system/xbin/which", "/system/xbin/whoami",
"/system/xbin/xargs", "/system/xbin/xz", "/system/xbin/xzcat",
"/system/xbin/yes",
"/system/xbin/zcat");
symlink("libGLESv2.so", "/system/lib/libGLESv3.so");
symlink("logcat", "/system/bin/lolcat");
symlink("mksh", "/system/bin/sh");
symlink("mount.exfat", "/system/bin/fsck.exfat",
"/system/bin/mkfs.exfat");
symlink("pigz", "/system/xbin/unpigz");
symlink("toolbox", "/system/bin/cat", "/system/bin/chcon",
"/system/bin/chmod", "/system/bin/chown", "/system/bin/clear",
"/system/bin/cmp", "/system/bin/cp", "/system/bin/date",
"/system/bin/dd", "/system/bin/df", "/system/bin/dmesg",
"/system/bin/du", "/system/bin/getenforce", "/system/bin/getevent",
"/system/bin/getprop", "/system/bin/getsebool", "/system/bin/grep",
"/system/bin/hd", "/system/bin/id", "/system/bin/ifconfig",
"/system/bin/iftop", "/system/bin/insmod", "/system/bin/ioctl",
"/system/bin/ionice", "/system/bin/kill", "/system/bin/ln",
"/system/bin/load_policy", "/system/bin/log", "/system/bin/ls",
"/system/bin/lsmod", "/system/bin/lsof", "/system/bin/md5",
"/system/bin/mkdir", "/system/bin/mkswap", "/system/bin/mount",
"/system/bin/mv", "/system/bin/nandread", "/system/bin/netstat",
"/system/bin/newfs_msdos", "/system/bin/notify", "/system/bin/printenv",
"/system/bin/ps", "/system/bin/r", "/system/bin/readlink",
"/system/bin/renice", "/system/bin/restart", "/system/bin/restorecon",
"/system/bin/rm", "/system/bin/rmdir", "/system/bin/rmmod",
"/system/bin/route", "/system/bin/runcon", "/system/bin/schedtop",
"/system/bin/sendevent", "/system/bin/setconsole",
"/system/bin/setenforce", "/system/bin/setfattr", "/system/bin/setprop",
"/system/bin/setsebool", "/system/bin/sleep", "/system/bin/smd",
"/system/bin/start", "/system/bin/stop", "/system/bin/swapoff",
"/system/bin/swapon", "/system/bin/sync", "/system/bin/top",
"/system/bin/touch", "/system/bin/umount", "/system/bin/uptime",
"/system/bin/vmstat", "/system/bin/watchprops",
"/system/bin/wipe");
symlink("/system/vendor/firmware/fw_bcmdhd.bin", "/system/etc/firmware/fw_bcmdhd.bin");
symlink("/system/vendor/firmware/fw_bcmdhd_apsta.bin", "/system/etc/firmware/fw_bcmdhd_apsta.bin");
ui_print(" Setting permissions...");
set_perm_recursive(0, 0, 0755, 0644, "/system");
set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");
set_perm(0, 3003, 02750, "/system/bin/netcfg");
set_perm(0, 3004, 02755, "/system/bin/ping");
set_perm(0, 2000, 06750, "/system/bin/run-as");
set_perm(1014, 2000, 0550, "/system/etc/dhcpcd/dhcpcd-run-hooks");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor");
set_perm(0, 2000, 0755, "/system/vendor/lib");
set_perm(0, 0, 0644, "/system/vendor/lib/libbt-vendor.so");
set_perm_recursive(0, 2000, 0755, 0755, "/system/xbin");
set_perm(0, 0, 06755, "/system/xbin/librank");
set_perm(0, 0, 06755, "/system/xbin/procmem");
set_perm(0, 0, 06755, "/system/xbin/procrank");
set_perm(0, 0, 06755, "/system/xbin/tcpdump");
set_perm(0, 0, 06755, "/system/xbin/busybox");
set_perm(0, 0, 06755, "/system/xbin/su");
set_perm_recursive(0, 2000, 0755, 0750, "/system/etc/init.d");
set_perm(0, 0, 0755, "/system/etc/init.d");
set_perm_recursive(0, 1001, 0755, 0775, "/system/etc/ppp");
set_perm(0, 0, 04755, "/system/bin/pppd");
set_perm_recursive(1000, 1000, 0771, 0644, "/data/app");
ui_print(" Symlinks and permissions done.");

###############
# Cleaning up #
###############

set_progress(0.95);
ui_print("@ Cleaning up...");
delete("/tmp");
ui_print(" Unmounting...");
unmount("/boot");
unmount("/system");
unmount("/data");
ui_print(" Done.");

set_progress(1.0);
ui_print("@ Installation Complete");
ui_print(" Please reboot.");

With all the ramdisk/boot stuff being handled by the dash script. As said I don't have a device to check whether or not it would run this way or not, but it would help debug things by having a script run. Have you considered that dalvik mightn't be being wiped properly?

Uploaded the above to devhost (devhost link) - accidentally removed checksys.sh, (ROM_NAME.prop) and SD-EXT_mounter.sh from the boot folder - used by aroma. (attached).

Just noticed I forgot to add the initrdcp function to ramdiskscr.sh

initrdcp() {
### Copying the ramdisk and checking if it needs the 6MB 00 file ###
busybox printf "%b\n" "copying ramdisk"
###### Checking bootloader
if [ ${bootloader} != cLK ]; then
###### Checking zImage type
if [ -f /tmp/zImage ]; then
`hexdump /tmp/zImage | grep '1f 8b 08'` > /tmp/zI.txt
if grep -q [COLOR="RoyalBlue"]00004210[/COLOR]"/tmp/zI.txt"; then
dd if=/dev/zero of=/tmp/6MB bs=1M count=6
fi
fi
cat /tmp/initrd-done.gz >> /tmp/6MB; cp /tmp/6MB /tmp/initrd.gz
else
cp /tmp/initrd-done.gz /tmp/initrd.gz
fi
cp /tmp/initrd.gz /boot/initrd.gz; cp /tmp/zImage /boot/zImage; cp /tmp/initrd.gz /boot_dir/initrd.gz; cp /tmp/zImage /boot_dir/zImage
}

Getting a different hexdump number for this kernel (as above).