[Nexus S 4G Android Development] TheBurgh:
Below is the error that I get when I try to nandroid backup. I have flashed other recoveries and have no problem with nandroid backups. Please Help:

Starting recovery on Tue Dec 20 13:08:32 2011

Pixel format: 480x800 @ 32bpp

Pixel format: RGB_565

framebuffer: fd 3 (480 x 800)

Loading volume table...

recovery filesystem table

0 /tmp ramdisk (null) (null)

1 /sdcard vfat /dev/block/platform/s3c-sdhci.0/by-name/media (null)

2 /system ext4 /dev/block/platform/s3c-sdhci.0/by-name/system (null)

3 /cache yaffs2 cache (null)

4 /data ext4 /dev/block/platform/s3c-sdhci.0/by-name/userdata (null)

5 /misc mtd misc (null)

6 /boot mtd boot (null)

7 /recovery mtd recovery (null)

8 /bootloader mtd bootloader (null)

9 /radio mtd radio (null)

10 /wimax mtd wimax (null)

11 /efs yaffs2 efs (null)

E:failed to mount /sdcard (No such file or directory)

I:Loading package: TWRP (/script/ui.xml)

I:Loading package: TWRP (/sdcard/TWRP/theme/ui.zip)

I:Loading package: TWRP (/res/ui.xml)

I:Loading resources...

I:Loading variables...

I:Loading pages...

I:Loading page main

I:Loading page install

I:Loading page flash_confirm

I:Loading page flash_zip

I:Loading page flash_done

I:Loading page wipe_cachedalvik

I:Loading page wipe_installdone

I:Loading page wipe

I:Loading page wipe_cache_confirm

I:Loading page wipe_cache

I:Loading page wipe_dalvik_confirm

I:Loading page wipe_dalvik

I:Loading page wipe_rotate_confirm

I:Loading page wipe_rotate

I:Loading page wipe_data_confirm

I:Loading page wipe_data

I:Loading page wipe_system_confirm

I:Loading page wipe_system

I:Loading page wipe_sdcard_confirm

I:Loading page wipe_sdcard

I:Loading page wipe_sdext_confirm

I:Loading page wipe_sdext

I:Loading page wipe_battery_confirm

I:Loading page wipe_battery

I:Loading page wipe_done

I:Loading page backup

I:Loading page backup_run

I:Loading page backup_done

I:Loading page backup_success

I:Loading page backup_failed

I:Loading page restore

E:error opening /sdcard/TWRP/BACKUPS/37339852924200EC

I:Loading page restore_setrestoredata

I:Loading page restore_select

I:Loading page restore_run

I:Loading page restore_done

I:Loading page restore_success

I:Loading page restore_failed

I:Loading page mount

I:Loading page usb_mount

I:Loading page usb_umount

I:Loading page reboot

I:Loading page settings

I:Loading page timezonemain

I:Loading page timezoneminus

I:Loading page timezoneplus

I:Loading page advanced

I:Loading page copylog_done

I:Loading page partsdcard

I:Loading page partsdcardaction

I:Loading page partsdcard_done

I:Loading page fixperms

I:Loading page fixperms_done

I:Switching packages (TWRP)

Processing arguments (1)...

Fixing execute permissions for /cache

mtd: successfully wrote block at 0

I:Set boot command "boot-recovery"

I:=> Installing busybox into /sbin

I:=> Linking mtab

I:=> Getting locations

W:Device does not support /proc/emmc

I:=> Let's update filesystem types.

I:=> And update our fstab also.

I:=> Created /efs folder.

I:=> Update the usage statistics.

E:Unable to stat '/sd-ext/.'

+----------+-----------------------------+------+----------+----------+---+---+

| Mount | Block Device | fst | Size(KB) | Used(KB) | M | B |

+----------+-----------------------------+------+----------+----------+---+---+

| | | mtd | 0 | 0 | 0 | u |

| system | /dev/block/mmcblk0p1 | ext4 | 524288 | 213040 | 1 | f |

| data | /dev/block/mmcblk0p2 | ext4 | 1048576 | 262984 | 1 | f |

| boot | /dev/block/mtdblock2 | mtd | 8192 | 8192 | 0 | i |

| recovery | /dev/block/mtdblock3 | mtd | 8192 | 8192 | 0 | i |

| cache | /dev/block/mtdblock4 | yaffs2 | 480768 | 2840 | 1 | f |

| sdcard | /dev/block/mmcblk0p3 | vfat | 13978607 | 5930928 | 1 | n |

| | | | 0 | 0 | 0 | n |

| andsec | /sdcard/.android_secure | vfat | 4 | 4 | 0 | f |

| sd-ext | /dev/block/mmcblk0p4 | | 0 | 0 | 1 | f |

| efs | /dev/block/mtdblock6 | yaffs2 | 6912 | 1600 | 1 | f |

| | | | 0 | 0 | 0 | n |

| | | | 0 | 0 | 0 | n |

+----------+-----------------------------+------+----------+----------+---+---+

Command: "/sbin/recovery"

ro.secure=0

ro.allow.mock.location=1

ro.debuggable=1

persist.service.adb.enable=1

ro.build.id=GRJ90

ro.build.display.id=GRJ90

ro.build.version.incremental=138666

ro.build.version.sdk=10

ro.build.version.codename=REL

ro.build.version.release=2.3.5

ro.build.date=Fri Dec 16 20:13:30 CST 2011

ro.build.date.utc=0

ro.build.type=eng

ro.build.user=TeamWin

ro.build.host=teamw.in

ro.build.tags=test-keys

ro.product.model=Nexus S 4G

ro.product.brand=google

ro.product.name=sojus

ro.product.device=crespo4g

ro.product.board=herring

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=samsung

ro.product.locale.language=hdpi

ro.product.locale.region=

ro.wifi.channels=

ro.board.platform=s5pc110

ro.build.product=crespo4g

ro.build.description=sojus-user 2.3.5 GRJ90 138666 release-keys

ro.build.fingerprint=google/sojus/crespo4g:2.3.5/GRJ90/138666:user/release-keys

rild.libpath=/vendor/lib/libsec-ril.so

rild.libargs=-d /dev/ttyS0

ro.sf.lcd_density=240

ril.ecclist=911,#911,*911

ro.cdma.home.operator.numeric=310120

ro.cdma.home.operator.alpha=Sprint

ro.telephony.default_network=4

ro.wimax.interface=uwbr0

ro.opengles.version=131072

wifi.interface=eth0

wifi.supplicant_scan_interval=15

dalvik.vm.heapsize=32m

keyguard.no_require_sim=true

ro.ril.hsxpa=1

ro.ril.gprsclass=10

ro.config.notification_sound=OnTheHunt.ogg

ro.config.alarm_alert=Alarm_Classic.ogg

ro.rommanager.developerid=cyanogenmod

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.dateformat=MM-dd-yyyy

ro.com.android.dataroaming=false

ro.config.ringtone=Playa.ogg

ro.modversion=CyanogenMod-7.1.0-RC1-NS4G-KANG

ro.kernel.android.checkjni=1

ro.setupwizard.mode=OPTIONAL

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=37339852924200EC

ro.bootmode=unknown

ro.baseband=D720SPRKE1

ro.carrier=SPR

ro.bootloader=D720SPRKC5

ro.hardware=herring

ro.revision=34

init.svc.dmesg=stopped

init.svc.recovery=running

init.svc.adbd=running

mtd: successfully wrote block at 0

I:Set boot command ""

I:Switching packages (TWRP)

I:Set page: 'settings'

I:Set page: 'main'

I:Set page: 'advanced'

Copied recovery log to /sdcard.

I:Set page: 'copylog_done'

I:Set page: 'advanced'

I:Set page: 'main'

I:Set page: 'backup'

I:Set page: 'backup_run'

[BACKUP STARTED]

* Backup Folder: /sdcard/TWRP/BACKUPS

* Verifying filesystems...

* Verifying partition sizes...

E:Unable to stat '/sd-ext/.'

+----------+-----------------------------+------+----------+----------+---+---+

| Mount | Block Device | fst | Size(KB) | Used(KB) | M | B |

+----------+-----------------------------+------+----------+----------+---+---+

| | | mtd | 0 | 0 | 0 | u |

| system | /dev/block/mmcblk0p1 | ext4 | 524288 | 213040 | 1 | f |

| data | /dev/block/mmcblk0p2 | ext4 | 1048576 | 262984 | 1 | f |

| boot | /dev/block/mtdblock2 | mtd | 8192 | 8192 | 0 | i |

| recovery | /dev/block/mtdblock3 | mtd | 8192 | 8192 | 0 | i |

| cache | /dev/block/mtdblock4 | yaffs2 | 480768 | 2852 | 1 | f |

| sdcard | /dev/block/mmcblk0p3 | vfat | 13978607 | 5930944 | 1 | n |

| | | | 0 | 0 | 0 | n |

| andsec | /sdcard/.android_secure | vfat | 4 | 4 | 0 | f |

| sd-ext | /dev/block/mmcblk0p4 | | 0 | 0 | 1 | f |

| efs | /dev/block/mtdblock6 | yaffs2 | 6912 | 1600 | 1 | f |

| | | | 0 | 0 | 0 | n |

| | | | 0 | 0 | 0 | n |

+----------+-----------------------------+------+----------+----------+---+---+

* Total number of partition to back up: 3

* Total size of all data, in KB: 484216

* Available space on the SD card, in KB: 8047663

I:Estimated Total time: 162 Estimated remaining time: 162

I:=> Filename: system.ext4.win

I:=> Size of /system is 213040 KB.

[SYSTEM (208 MB)]

...Backing up /system partition.

* Done.

* Verifying backup size.

* File size: 207889408 bytes.

* Generating md5...

....MD5 Created.

[SYSTEM DONE (35 SECONDS)]

I:Partition Backup time: 35

I:Estimated Total time: 162 Estimated remaining time: 89

I:=> Filename: data.ext4.win

I:=> Size of /data is 262984 KB.

[DATA (256 MB)]

...Backing up /data partition.

tar: ./gps/secgpsd.socket: socket ignored

tar: ./misc/wifi/sockets/wpa_ctrl_152-2: socket ignored

tar: ./misc/wifi/sockets/wpa_ctrl_152-3: socket ignored

* Done.

* Verifying backup size.

* File size: 252594688 bytes.

* Generating md5...

....MD5 Created.

[DATA DONE (53 SECONDS)]

I:Partition Backup time: 53

I:Estimated Total time: 162 Estimated remaining time: 0

I:=> Filename: boot.mtd.win

I:=> Size of boot is 8192 KB.

[BOOT (8 MB)]

...Backing up boot partition.

mtd: ECC errors (0 soft, 64 hard) at 0x00000000

mtd: ECC errors (0 soft, 64 hard) at 0x00040000

mtd: ECC errors (0 soft, 64 hard) at 0x00080000

mtd: ECC errors (0 soft, 64 hard) at 0x000c0000

mtd: ECC errors (0 soft, 64 hard) at 0x00100000

mtd: ECC errors (0 soft, 64 hard) at 0x00140000

mtd: ECC errors (0 soft, 64 hard) at 0x00180000

mtd: ECC errors (0 soft, 64 hard) at 0x001c0000

mtd: ECC errors (0 soft, 64 hard) at 0x00200000

mtd: ECC errors (0 soft, 64 hard) at 0x00240000

mtd: ECC errors (0 soft, 64 hard) at 0x00280000

mtd: ECC errors (0 soft, 64 hard) at 0x002c0000

* Done.

* Verifying backup size.

* File size: 5242880 bytes.

I: * Expected size: 8388608 Got: 5242880

E: File size is incorrect. Aborting.

I:Set page: 'backup_done'

I:Set page: 'backup_failed'

-- Error occured, check recovery.log. Aborting.

I:Set page: 'main'

I:Set page: 'advanced'