[Zenfone 5 Q&A, Help & Troubleshooting] smnshuvo:
It is looping in the boot and flashing new rom or raw doesn't help. Download the log from attachment. Not possible to attach here fully.

__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 2.8.6.0 on Fri Feb 21 11:08:19 2014
(pid 137)
BOARD_HAS_NO_REAL_SDCARD := true
RECOVERY_SDCARD_ON_DATA := true
TW_POWER_BUTTON := 116
I:Lun file '/sys/devices/virtual/android_usb/android0/f_mass_storage/lun/file'
TW_INCLUDE_CRYPTO := true
I:TW_BRIGHTNESS_PATH := /sys/class/backlight/psb-bl/brightness
I:Found brightness file at '/sys/class/backlight/psb-bl/brightness'
I:TWFunc::Set_Brightness: Setting brightness control to 255
Starting the UI...Pixel format: 720x1280 @ 32bpp
Pixel format: BGRA_8888
Not using qualcomm overlay, 'psbfb'
framebuffer: fd 4 (720 x 1280)
TW_SCREEN_BLANK_ON_BOOT := true
Unable to locate '/twres/images/curtain.jpg'
Did you set a TW_THEME in your config files?
=> Linking mtab
Renaming regular /etc/recovery.fstab -> /etc/recovery.fstab.bak
Moving /etc/twrp.fstab -> /etc/recovery.fstab
=> Processing recovery.fstab
I:Processing '/boot'
E:Unknown File System: 'osip'
I:Processing '/recovery'
E:Unknown File System: 'osip'
I:Processing '/fastboot'
E:Unknown File System: 'osip'
I:Processing '/cache'
I:Created '/cache' folder.
I:Processing '/system'
I:Processing '/data'
I:Setting up '/data' as data/media emulated storage.
I:Created '/emmc' folder.
I:mount -o bind '/data/media' '/emmc' process ended with RC=0
I:mount -o bind '/data/media/0' '/emmc' process ended with RC=0
I:mount -o bind '/data/media/0' '/emmc' process ended with RC=0
I:Processing '/factory'
I:Processing '/config'
I:Created '/config' folder.
I:Processing '/sdcard'
I:Created '/sdcard' folder.
I:Processing '/usb_otg'
I:Created '/usb_otg' folder.
I:Backup folder set to '/data/media/0/TWRP/BACKUPS/Medfield9762FC26'
I:Settings storage is '/data/media/0'
Updating partition details...
I:Data backup size is 1MB, free: 12402MB.
I:Can't probe device /dev/block/mmcblk0p3
E:Unable to mount '/factory'
I:Actual block device: '/dev/block/mmcblk0p3', current file system: 'ext4'
I:Unable to mount '/sdcard'
I:Actual block device: '', current file system: 'vfat'
...done
I:Unmounting main partitions...

Partition Logs:
/cache | /dev/block/mmcblk0p6 | Size: 495MB Used: 0MB Free: 495MB Backup Size: 0MB
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/mmcblk0p6
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

/system | /dev/block/mmcblk0p9 | Size: 1259MB Used: 993MB Free: 266MB Backup Size: 993MB
Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_Available_in_GUI IsPresent
Primary_Block_Device: /dev/block/mmcblk0p9
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

/data | /dev/block/mmcblk0p10 | Size: 12435MB Used: 1MB Free: 12402MB Backup Size: 1MB
Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_During_Factory_Reset Wipe_Available_in_GUI IsPresent Can_Be_Encrypted Has_Data_Media Can_Encrypt_Backup Use_Userdata_Encryption Is_Storage Is_Settings_Storage
Symlink_Path: /data/media/0
Symlink_Mount_Point: /emmc
Primary_Block_Device: /dev/block/mmcblk0p10
Crypto_Key_Location: /dev/block/mmcblk0p3/userdata_footer
Display_Name: Data
Storage_Name: Internal Storage
Backup_Path: /data
Backup_Name: data
Backup_Display_Name: Data
Storage_Path: /data/media/0
Current_File_System: ext4
Fstab_File_System: ext4
Backup_Method: files
MTP_Storage_ID: 65537

/factory | /dev/block/mmcblk0p3 | Size: 0MB Used: 0MB Free: 0MB Backup Size: 0MB
Flags: Can_Be_Mounted Can_Be_Wiped IsPresent
Primary_Block_Device: /dev/block/mmcblk0p3
Display_Name: factory
Storage_Name: factory
Backup_Path: /factory
Backup_Name: factory
Backup_Display_Name: factory
Storage_Path: /factory
Current_File_System: ext4
Fstab_File_System: ext4
Backup_Method: files

/config | /dev/block/mmcblk0p5 | Size: 27MB Used: 0MB Free: 26MB Backup Size: 0MB
Flags: Can_Be_Mounted Can_Be_Wiped IsPresent
Primary_Block_Device: /dev/block/mmcblk0p5
Display_Name: config
Storage_Name: config
Backup_Path: /config
Backup_Name: config
Backup_Display_Name: config
Storage_Path: /config
Current_File_System: ext4
Fstab_File_System: ext4
Backup_Method: files

/sdcard | | Size: 0MB Used: 0MB Free: 0MB Backup Size: 0MB
Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI Removable Is_Storage
Primary_Block_Device: /dev/block/mmcblk1p1
Display_Name: MicroSD
Storage_Name: MicroSD
Backup_Path: /sdcard
Backup_Name: sdcard
Backup_Display_Name: MicroSD
Storage_Path: /sdcard
Current_File_System: vfat
Fstab_File_System: vfat
Backup_Method: files
MTP_Storage_ID: 65538

/usb_otg | /dev/block/sda1 | Size: 7372MB Used: 7363MB Free: 9MB Backup Size: 7363MB
Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI Removable IsPresent Is_Storage
Primary_Block_Device: /dev/block/sda1
Alternate_Block_Device: /dev/block/sda
Display_Name: USB-OTG
Storage_Name: USB-OTG
Backup_Path: /usb_otg
Backup_Name: usb_otg
Backup_Display_Name: USB-OTG
Storage_Path: /usb_otg
Current_File_System: vfat
Fstab_File_System: vfat
Backup_Method: files
MTP_Storage_ID: 65539

SELinux contexts loaded from /file_contexts
Full SELinux support is present.
I:Not using /misc, not defined in fstab.
I:Not using /misc, not defined in fstab.
Startup Commands:
bt.version.driver=V18.23.38.1.0
ro.sf.lcd_density=320
ro.adb.secure=0
ro.com.android.dateformat=MM-dd-yyyy
ro.com.android.dataroaming=false
ro.ime.lowmemory=false
ro.ril.status.polling.enable=0
ro.asus.ui=1.0
ro.asus.amax.lite=1
ro.boot.mode=fota
ro.boot.spid=0000:0000:0003:0002:0000:0021
ro.boot.wakesrc=05
ro.boot.hardware=redhookbay
ro.boot.serialno=Medfield9762FC26
ro.boot.bootmedia=sdcard
ro.epad.model=ASUS_T00F
ro.hwui.texture_cache_size=24.0f
ro.hwui.text_large_cache_width=2048
ro.hwui.text_small_cache_width=2048
ro.hwui.text_large_cache_height=512
ro.hwui.text_small_cache_height=1024
ro.spid.gps.pmm=disabled
ro.spid.gps.tty=ttyMFD3
ro.twrp.boot=1
ro.twrp.version=2.8.6.0
ro.wifi.channels=
ro.allow.mock.location=0
ro.board.platform=clovertrail
ro.build.id=KVT49L
ro.build.app.version=044000307_201407220024
ro.build.csc.version=CN_A500CG_2.22.40.54_20150527_44_user
ro.build.asus.sku=CN
ro.build.asus.version=2.22.40.54
ro.build.asus.version.pensdk=1
ro.build.date=Wed May 27 23:01:57 CST 2015
ro.build.date.utc=39999717
ro.build.host=ReleaseServer
ro.build.tags=release-keys
ro.build.type=user
ro.build.user=jenkins
ro.build.display.id=ASUS_T00F_CN_user_2.22.40.54_20150527_44 release-keys
ro.build.product=ASUS_T00F
ro.build.version.sdk=19
ro.build.version.release=4.4.2
ro.build.version.codename=REL
ro.build.version.incremental=CN_a500cg-CN_user_2.22.40.54_20150527_44-user-20150527
ro.build.description=a500cg-user 4.4.2 KVT49L CN_user_2.22.40.54_20150527_44 release-keys
ro.build.fingerprint=asus/CN_a500cg/ASUS_T00F:4.4.2/KVT49L/CN_user_2.22.40.54_20150527_44:user/release-keys
ro.build.characteristics=default
ro.config.hwrlib=T9_x86
ro.config.xt9ime.max_subtype=7
ro.config.ringtone=Festival.ogg
ro.config.alarm_alert=BusyBugs.ogg
ro.config.personality=compat_layout
ro.config.newmail_sound=NewMail.ogg
ro.config.sentmail_sound=SentMail.ogg
ro.config.notification_sound=NewMessage.ogg
ro.config.calendaralert_sound=CalendarEvent.ogg
ro.secure=0
ro.system.simtype=2
ro.carrier=unknown
ro.contact.simtype=1
ro.product.cpu.abi=x86
ro.product.cpu.abi2=armeabi-v7a
ro.product.name=CN_a500cg
ro.product.board=clovertrail
ro.product.brand=asus
ro.product.model=ASUS_T00F
ro.product.device=ASUS_T00F
ro.product.locale.region=CN
ro.product.locale.language=zh
ro.product.manufacturer=asus
ro.baseband=unknown
ro.bootmode=fota
ro.hardware=redhookbay
ro.opengles.version=131072
ro.revision=0
ro.streaming.video.drs=true
ro.bootloader=unknown
ro.debuggable=1
ro.factorytest=0
ro.blankphone_id=1
ro.additionalbutton.operation=0
rs.gpu.rsIntrinsic=0
rs.gpu.filterscript=0
rs.gpu.renderscript=0
drm.service.enabled=true
gps.version.driver=6.19.6.216527
gsm.net.interface=rmnet0
net.bt.name=Android
net.change=net.bt.name
init.svc.adbd=running
init.svc.healthd=running
init.svc.ueventd=running
init.svc.recovery=running
init.svc.watchdogd=running
init.svc.killservices=stopped
init.svc.flash_recovery=stopped
init.svc.set_permissive=stopped
twrp.crash_counter=0
widi.uibc.enable=false
widi.media.extmode.enable=false
wifi.version.driver=5.90.195.89.32
panel.physicalWidthmm=62
panel.physicalHeightmm=110
dalvik.vm.heapsize=256m
dalvik.vm.heapmaxfree=6m
dalvik.vm.heapminfree=2m
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=96m
dalvik.vm.stack-trace-file=/data/anr/traces.txt
dalvik.vm.heaptargetutilization=0.75
dalvik.jit.code_cache_size=1048576
persist.sys.cta.security=0
persist.sys.usb.config=mtp,adb
persist.sys.dalvik.vm.lib=libdvm.so
persist.tcs.config_name=XMM6360_CONF_FLASHLESS
persist.tel.hot_swap.support=true
persist.asus.cb.debug=0
persist.asus.message.gcf.mode=0
persist.asus.message.debug=0
persist.system.at-proxy.mode=0
persist.telproviders.debug=0
service.adb.root=1
keyguard.no_require_sim=true

I:Copying file /cache/recovery/log to /cache/recovery/last_log
tw_get_context got selinux context: u:object_r:media_rw_data_file:s0
I:Got default contexts and file mode for storage files.
I:Attempt to load settings from settings file...
I:Loading settings from '/data/media/0/TWRP/.twrps'.
I:Backup folder set to '/usb_otg/TWRP/BACKUPS/Medfield9762FC26'
I:Copying file /etc/recovery.fstab to /cache/recovery/recovery.fstab
I:Version number saved to '/cache/recovery/.version'
I:Unable to mount '/sdcard'
I:Actual block device: '', current file system: 'vfat'

MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
I:Set page: 'filemanagerlist'
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
MtpServer::run fd: 14

I:addFile '/data/system/dropbox' including root: 0
setting selinux context: u:object_r:system_data_file:s0
I:addFile '/data/tombstones' including root: 0
setting selinux context: u:object_r:tombstone_data_file:s0
I:addFile '/data/modem' including root: 0
setting selinux context: u:object_r:system_data_file:s0
I:addFile '/data/fota_tmp' including root: 0
setting selinux context: u:object_r:system_data_file:s0
I:Thread id 0 tarList done, 0 archives.
I:Thread ID 0 finished successfully.
I:InfoManager saving '/usb_otg/TWRP/BACKUPS/Medfield9762FC26/Backup Zenny/data.info'
I:createTarFork() process ended with RC=0
I:Partition Backup time: 0
* Generating md5...
I:MD5 for /usb_otg/TWRP/BACKUPS/Medfield9762FC26/Backup Zenny/data.ext4.win: 7ca6a2975319ef42df224188cdf6b853 data.ext4.win

* MD5 Created.
MtpServer::run fd: 14
E:request read returned -1, errno: 5, exiting MtpServer::run loop
E:Unable to locate '/boot' partition for backup process.
Average backup rate for file systems: 8 MB/sec
Average backup rate for imaged drives: 0 MB/sec
[991 MB TOTAL BACKED UP]
Updating partition details...
I:Data backup size is 1MB, free: 12402MB.
I:Can't probe device /dev/block/mmcblk0p3
E:Unable to mount '/factory'
I:Actual block device: '/dev/block/mmcblk0p3', current file system: 'ext4'
I:Unable to mount '/sdcard'
I:Actual block device: '', current file system: 'vfat'
...done
I:Unmounting main partitions...
[BACKUP COMPLETED IN 138 SECONDS]

I:Copying file /tmp/recovery.log to /usb_otg/TWRP/BACKUPS/Medfield9762FC26/Backup Zenny/recovery.log