[Asus  Eee Pad Transformer Prime] cassato:
rooted my tf201 by unlocking and installing cm9 thru clockwork recovery. I got the touch version of recovery and tried using that to make a backup of my ROM but it didnt work - folder was created but the transformer prime just rebooted. I tried the regular recovery and the same thing happened, below is the error log (thanks):

Starting recovery on Thu Jun 14 02:59:48 2012

can't open /dev/tty0: No such file or directory

framebuffer: fd 3 (1280 x 800)

ClockworkMod Recovery v5.8.3.4

recovery filesystem table

=========================

0 /tmp ramdisk (null) (null) 0

1 /system ext4 /dev/block/mmcblk0p1 (null) 0

2 /cache ext4 /dev/block/mmcblk0p2 (null) 0

3 /misc emmc /dev/block/mmcblk0p3 (null) 0

4 /staging ext3 /dev/block/mmcblk0p4 (null) 0

5 /data ext4 /dev/block/mmcblk0p8 (null) 0

6 /boot emmc /dev/block/mmcblk0p10 (null) 0

7 /recovery emmc /dev/block/mmcblk0p9 (null) 0

W:Unable to get recovery.fstab info for /datadata during fstab generation!

W:Unable to get recovery.fstab info for /emmc during fstab generation!

W:Unable to get recovery.fstab info for /sdcard during fstab generation!

W:Unable to get recovery.fstab info for /sd-ext during fstab generation!

I:Completed outputting fstab.

I:Processing arguments.

I:Checking arguments.

I:device_recovery_start()

Command: "/sbin/recovery"

ro.secure=1

ro.allow.mock.location=0

ro.debuggable=1

persist.sys.usb.config=mtp,adb

ro.build.id=IMM76I

ro.build.display.id=cm_tf201-userdebug 4.0.4 IMM76I eng.koush.20120601.133409 test-keys

ro.build.version.incremental=eng.koush.20120601.133409

ro.build.version.sdk=15

ro.build.version.codename=REL

ro.build.version.release=4.0.4

ro.build.date=Fri Jun 1 13:34:38 PDT 2012

ro.build.date.utc=0

ro.build.type=userdebug

ro.build.user=koush

ro.build.host=Koushik-Lion.local

ro.build.tags=test-keys

ro.product.model=Transformer Prime TF201

ro.product.brand=asus

ro.product.name=EeePad

ro.product.device=tf201

ro.product.board=cardhu

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=asus

ro.product.locale.language=en

ro.product.locale.region=US

ro.wifi.channels=

ro.board.platform=tegra

ro.build.product=tf201

ro.build.description=US_epad-user 4.0.3 IML74K US_epad-9.4.2.21-20120323 release-keys

ro.build.fingerprint=asus/US_epad/TF201:4.0.3/IML74K/US_epad-9.4.2.21-20120323:user/release-keys

ro.build.characteristics=tablet

ro.cm.device=tf201

ro.carrier=wifi-only

ro.com.android.dateformat=MM-dd-yyyy

wifi.interface=wlan0

wifi.supplicant_scan_interval=15

ro.opengles.version=131072

persist.tegra.nvmmlite=1

ro.epad.model=TF201

dalvik.vm.heapstartsize=5m

dalvik.vm.heapgrowthlimit=48m

dalvik.vm.heapsize=256m

ro.rommanager.developerid=cyanogenmod

keyguard.no_require_sim=true

ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html

ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html

ro.com.google.clientidbase=android-google

ro.com.android.wifi-watchlist=GoogleGuest

ro.setupwizard.enterprise_mode=1

ro.com.android.dataroaming=false

ro.cm.version=9.0.0-RC0-tf201-UNOFFICIAL

ro.modversion=9.0.0-RC0-tf201-UNOFFICIAL

ro.config.ringtone=CyanTone.ogg

ro.config.notification_sound=CyanMessage.ogg

ro.config.alarm_alert=CyanAlarm.ogg

dalvik.vm.lockprof.threshold=500

dalvik.vm.dexopt-flags=m=y

net.bt.name=Android

net.change=net.bt.name

dalvik.vm.stack-trace-file=/data/anr/traces.txt

ro.factorytest=0

ro.serialno=015d0787be3c180d

ro.bootmode=unknown

ro.baseband=unknown

ro.bootloader=unknown

ro.hardware=cardhu

ro.revision=0

ro.emmc=0

init.svc.recovery=running

init.svc.mischelp=restarting

init.svc.adbd=running

service.adb.root=1

I:Checking for extendedcommand...

I:Running extendedcommand...

Waiting for SD Card to mount (20s)

I:using /data/media, no /sdcard found.

SD Card mounted...

Verifying SD Card marker...

cf32f57db85e48016a5b2e3564f0c9cb

I:Running script:

I:

ui_print("ROM Manager Version 5.0.0.7");

ui_print("June 13, 2012");

assert(backup_rom("/sdcard/clockworkmod/backup/cm9_v1.0"));

parse returned 0; 0 errors encountered

ROM Manager Version 5.0.0.7

June 13, 2012

I:using /data/media, no /sdcard found.

SD Card space free: 24882MB

Backing up boot image...

Error while backing up boot image!result was NULL, message is: assert failed: backup_rom("/sdcard/clockworkmod/backup/cm9_v1.0")

I:using /data/media, no /sdcard found.