[HTC Desire 601] lowsum:
Heres a twrp log, at first look the partition layout seems present. Hope this help!

__bionic_open_tzdata: couldn't find any tzdata when looking for localtime!

__bionic_open_tzdata: couldn't find any tzdata when looking for GMT!

__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!

Starting TWRP 2.6.3.0 on Tue Apr 8 01:39:44 2014

I:Internal path defined: '/data/media/0'

I:External path defined: '/external_sd'

I:Backup folder set to '/external_sd/TWRP/BACKUPS/SH3BHWK00393'

TW_DEFAULT_EXTERNAL_STORAGE := true

I:Lun file '/sys/devices/platform/msm_hsusb/gadget/lun0/file'

TW_INCLUDE_CRYPTO := true

Starting the UI...Pixel format: 540x960 @ 32bpp

Pixel format: BGR_565

framebuffer: fd 3 (540 x 960)

=> Linking mtab

Renaming regular /etc/recovery.fstab -> /etc/recovery.fstab.bak

Moving /etc/twrp.fstab -> /etc/recovery.fstab

=> Processing recovery.fstab

I:Processing '/boot'

I:Processing '/cache'

I:Processing '/data'

I:Processing '/recovery'

I:Processing '/system'

I:Processing '/devlog'

I:Created '/devlog' folder.

I:Processing '/external_sd'

I:Created '/external_sd' folder.

I:Backup folder set to '/external_sd/TWRP/BACKUPS/SH3BHWK00393'

I:Settings storage is '/external_sd'

Updating partition details...

I:Unmounting main partitions...

Partition Logs:

/boot | /dev/block/mmcblk0p33 | Size: 16MB

Flags: Can_Be_Backed_Up IsPresent

Primary_Block_Device: /dev/block/mmcblk0p33

Display_Name: Boot

Storage_Name: boot

Backup_Path: /boot

Backup_Name: boot

Backup_Display_Name: Boot

Storage_Path: /boot

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/cache | /dev/block/mmcblk0p36 | Size: 236MB Used: 13MB Free: 222MB Backup Size: 13MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_During_Factory_Reset Wipe_Available_in_GUI IsPresent

Primary_Block_Device: /dev/block/mmcblk0p36

Display_Name: Cache

Storage_Name: Cache

Backup_Path: /cache

Backup_Name: cache

Backup_Display_Name: Cache

Storage_Path: /cache

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/data | /dev/block/mmcblk0p37 | Size: 4787MB Used: 2189MB Free: 2597MB Backup Size: 2189MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_During_Factory_Reset Wipe_Available_in_GUI IsPresent Can_Be_Encrypted Can_Encrypt_Backup Use_Userdata_Encryption

Primary_Block_Device: /dev/block/mmcblk0p37

Length: -16384

Display_Name: Data

Storage_Name: Data

Backup_Path: /data

Backup_Name: data

Backup_Display_Name: Data

Storage_Path: /data

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/recovery | /dev/block/mmcblk0p34 | Size: 15MB

Flags: Can_Be_Backed_Up IsPresent

Primary_Block_Device: /dev/block/mmcblk0p34

Display_Name: Recovery

Storage_Name: recovery

Backup_Path: /recovery

Backup_Name: recovery

Backup_Display_Name: Recovery

Storage_Path: /recovery

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/system | /dev/block/mmcblk0p35 | Size: 1795MB Used: 1445MB Free: 350MB Backup Size: 1445MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_Available_in_GUI IsPresent

Primary_Block_Device: /dev/block/mmcblk0p35

Display_Name: System

Storage_Name: System

Backup_Path: /system

Backup_Name: system

Backup_Display_Name: System

Storage_Path: /system

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/devlog | /dev/block/mmcblk0p25 | Size: 19MB Used: 12MB Free: 6MB Backup Size: 12MB

Flags: Can_Be_Mounted Can_Be_Wiped IsPresent

Primary_Block_Device: /dev/block/mmcblk0p25

Display_Name: devlog

Storage_Name: devlog

Backup_Path: /devlog

Backup_Name: devlog

Backup_Display_Name: devlog

Storage_Path: /devlog

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/external_sd | /dev/block/mmcblk1p1 | Size: 30019MB Used: 12682MB Free: 17336MB Backup Size: 12682MB

Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI Removable IsPresent Is_Storage Is_Settings_Storage

Primary_Block_Device: /dev/block/mmcblk1p1

Alternate_Block_Device: /dev/block/mmcblk1

Display_Name: Micro SDcard

Storage_Name: Micro SDcard

Backup_Path: /external_sd

Backup_Name: external_sd

Backup_Display_Name: Micro SDcard

Storage_Path: /external_sd

Current_File_System: vfat

Fstab_File_System: vfat

Backup_Method: files

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

I:Loading package: TWRP (/external_sd/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 main2

I:Loading page install

I:Unable to open '/sdcard'

I:Loading page flash_confirm

I:Loading page flash_zip

I:Loading page flash_done

I:Loading page clear_vars

I:Loading page confirm_action

I:Loading page action_page

I:Loading page singleaction_page

I:Loading page action_complete

I:Loading page filecheck

I:Loading page rebootcheck

I:Loading page wipe

I:Loading page advancedwipe

I:Loading page formatdata

I:Loading page formatdata_confirm

I:Loading page backup

I:Loading page backupname1

I:Loading page backupname2

I:Loading page backupencryption

I:Loading page backupencryption2

I:Loading page checkbackuppassword

I:Loading page backup_run

I:Loading page restore

I:Loading page restore_read

I:Loading page restore_decrypt

I:Loading page try_restore_decrypt

I:Loading page restore_select

I:Loading page renamebackup

I:Loading page restore_run

I:Loading page selectstorage

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 timezone

I:Loading page screen

I:Loading page advanced

I:Loading page partsdcard

I:Loading page htcdumlock

I:Loading page lock

I:Loading page filemanagerlist

I:Loading page filemanageroptions

I:Loading page choosedestinationfolder

I:Loading page filemanagerrenamefile

I:Loading page filemanagerrenamefolder

I:Loading page filemanagerchmod

I:Loading page filemanagerconfirm

I:Loading page filemanageracction

I:Loading page decrypt

I:Loading page trydecrypt

I:Loading page terminalfolder

I:Loading page terminalcommand

I:Loading page sideload

I:Loading page installsu

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Switching packages (TWRP)

SELinux contexts loaded from /file_contexts

Kernel does not have support for reading SELinux contexts.

E:Cannot load volume /misc!

E:Cannot load volume /misc!

Startup Commands: ro.cm.device=zara

ro.cm.version=11-20131222-UNOFFICIAL-zara

ro.adb.qemud=1

ro.com.google.clientidbase=android-google

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

ro.com.android.dataroaming=false

ro.com.android.wifi-watchlist=GoogleGuest

ro.ril.hsxpa=1

ro.ril.gprsclass=10

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.boot.dq=PASS

ro.boot.lb=1

ro.boot.cid=BM___001

ro.boot.mid=0P4E23000

ro.boot.emmc=true

ro.boot.mode=recovery

ro.boot.hasfp=0

ro.boot.ddrmid=(0x6)

ro.boot.nledhw=0

ro.boot.carrier=BM

ro.boot.keycaps=qwerty

ro.boot.hardware=zara

ro.boot.pagesize=2048

ro.boot.serialno=SH3BHWK00393

ro.boot.devicerev=1

ro.boot.bootloader=2.22.0000

ro.boot.efuse_info=NNSL

ro.boot.batt_poweron=good_battery

ro.emmc=0

ro.wifi.channels=

ro.allow.mock.location=0

ro.board.platform=

ro.build.id=KOT49H

ro.build.date=Sat Dec 21 20:35:51 CST 2013

ro.build.date.utc=0

ro.build.host=dev

ro.build.tags=test-keys

ro.build.type=userdebug

ro.build.user=unjust

ro.build.display.id=cm_zara-userdebug 4.4.2 KOT49H 5435a969bc test-keys

ro.build.product=zara

ro.build.selinux=1

ro.build.version.sdk=19

ro.build.version.release=4.4.2

ro.build.version.codename=REL

ro.build.version.incremental=5435a969bc

ro.build.description=cm_zara-userdebug 4.4.2 KOT49H 5435a969bc test-keys

ro.build.fingerprint=htc/cm_zara/zara:4.4.2/KOT49H/5435a969bc:userdebug/test-keys

ro.build.characteristics=default

ro.config.ringtone=Orion.ogg

ro.config.alarm_alert=Hassium.ogg

ro.config.notification_sound=Argon.ogg

ro.secure=0

ro.carrier=unknown

ro.cmlegal.url=http://www.cyanogenmod.org/docs/privacy

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.name=cm_zara

ro.product.board=

ro.product.brand=htc

ro.product.model=zara

ro.product.device=zara

ro.product.locale.region=US

ro.product.locale.language=en

ro.product.manufacturer=htc

ro.baseband=unknown

ro.bootmode=recovery

ro.hardware=zara

ro.revision=1

ro.serialno=SH3BHWK00393

ro.9kramdump=0

ro.bootloader=2.22.0000

ro.debuggable=0

ro.modversion=11-20131222-UNOFFICIAL-zara

ro.rommanager.developerid=cyanogenmod

ro.factorytest=0

ro.setupwizard.enterprise_mode=1

net.bt.name=Android

net.change=net.bt.name

init.svc.healthd=running

init.svc.ueventd=running

init.svc.recovery=running

init.svc.choice_fn=stopped

dalvik.vm.lockprof.threshold=500

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

persist.sys.usb.config=adb

persist.sys.dalvik.vm.lib=libdvm.so

persist.sys.root_access=1

persist.service.adb.enable=1

keyguard.no_require_sim=true

I:Copying file /cache/recovery/log to /cache/recovery/last_log

I:Attempt to load settings from settings file...

I:Loading settings from '/external_sd/TWRP/.twrps'.

I:Backup folder set to '/external_sd/TWRP/BACKUPS/SH3BHWK00393'

I:Copying file /etc/recovery.fstab to /cache/recovery/recovery.fstab

I:Version number saved to '/cache/recovery/.version'

__bionic_open_tzdata: couldn't find any tzdata when looking for CST6CDT!

__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!

I:Switching packages (TWRP)

I:Set page: 'advanced'

I:Set page: 'main'

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Set page: 'settings'

I:Set page: 'timezone'

__bionic_open_tzdata: couldn't find any tzdata when looking for EST5EDT!

__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!

I:Set page: 'settings'

I:Set page: 'main'

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Set page: 'mount'

I:Set page: 'main'

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Set page: 'advanced'

I:Set page: 'confirm_action'

I:Set page: 'action_page'

I:Copying file /tmp/recovery.log to /external_sd/recovery.log