[Lenovo Yoga Book Guides, News, & Discussion] west0ne:
I've not had a chance to try the twrp yet but will give it a go but in the mean time.

Thanks.

Here is the diskinfo.

--------------------------
Internal Storage (MMC)
--------------------------
* Cache (android_cache) [mmcblk0p12] (/cache) [ext4]
Used: 14.3 MB, Free: 241 MB, Total space: 256 MB
* System (android_system) [mmcblk0p13] (/system) [ext4]
Used: 3.2 GB, Free: 582 MB, Total space: 3.8 GB
* Data (android_data) [mmcblk0p14] (/data) [ext4]
Used: 9.2 GB, Free: 43.7 GB, Total space: 53 GB
--------------------------
SD Card
--------------------------
* SD card [mmcblk1p1] (/mnt/media_rw/B260-11FE, /storage/B260-11FE) [vfat]
Used: 11.5 GB, Free: 17.4 GB, Total space: 29 GB
--------------------------
Memory
--------------------------
* RAM
Used: 992 MB, Free: 2.8 GB, Total space: 3.8 GB

Here's the build.prop

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=MMB29M
ro.build.display.id=YB1-X90F_USR_S000239_1612091428_WW06_BP_ROW
ro.build.version.incremental=YB1-X90F_USR_S000239_1612091428_WW06_BP_ROW
ro.build.version.sdk=23
ro.build.version.preview_sdk=0
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=6.0.1
ro.build.version.security_patch=2016-10-01
ro.build.version.base_os=
ro.build.date=2016年 12月 09日 星期五 15:04:15 CST
ro.build.date.utc=1481267055
ro.build.type=user
ro.build.user=buildslave
ro.build.host=bjws76
ro.build.tags=release-keys
ro.build.flavor=yeti_10_row_wifi-user
ro.product.ota.model=Lenovo YB1-X90F
ro.product.model=Lenovo YB1-X90F
ro.product.brand=Lenovo
ro.product.name=yeti_10_row_wifi
ro.product.device=yeti
ro.product.board=r2_cht_ffd
ro.lenovo.mtpname=YOGA BOOK
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=x86_64
ro.product.cpu.abilist=x86_64,x86,armeabi-v7a,armeabi,arm64-v8a
ro.product.cpu.abilist32=x86,armeabi-v7a,armeabi
ro.product.cpu.abilist64=x86_64,arm64-v8a
ro.product.manufacturer=LENOVO
ro.product.locale=en-US
ro.wifi.channels=
ro.board.platform=gmin
# ro.build.product is obsolete; use ro.product.device
ro.build.product=yeti
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description=yeti_10_row_wifi-user 6.0.1 MMB29M YB1-X90F_USR_S000239_1612091428_WW06_BP_ROW release-keys
ro.build.fingerprint=Lenovo/yeti_10_row_wifi/yeti:6.0.1/MMB29M/LenovoYB1-X90F_S000239_161209:user/release-keys
ro.build.characteristics=tablet
# end build properties

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.camera.rec.pixel_format=0x10F
sys.powerctl.no.shutdown=1
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=144m
dalvik.vm.heapsize=384m
dalvik.vm.heaptargetutilization=0.75
dalvik.vm.heapminfree=512k
dalvik.vm.heapmaxfree=8m
ro.dalvik.vm.isa.arm=x86
ro.enable.native.bridge.exec=1
ro.dalvik.vm.isa.arm64=x86_64
ro.enable.native.bridge.exec64=1
ro.setupwizard.mode=OPTIONAL
ro.com.google.gmsversion=6.0_r7
ro.opengles.version=196609
ro.ycbcr.pixel_format=0x10F
ro.spid.gps.FrqPlan=FRQ_PLAN_26MHZ_2PPM
ro.spid.gps.RfType=GL_RF_4752_BRCM_EXT_LNA
ro.spid.gps.pmm=disabled
drm.service.enabled=true
keyguard.no_require_sim=true
ro.com.android.dataroaming=false
ro.config.ringtone=Ring_Synth_04.ogg
ro.config.notification_sound=Notice.ogg
ro.carrier=unknown
ro.config.alarm_alert=New_Morning.ogg
ro.lenovo.device=tablet
ro.com.google.clientidbase=android-lenovo
persist.backgrounddata.enable=false
ro.lenovo.wificert=no
ro.lenovo.childmode=true
ro.lenovo.mtpname=YOGA
BOOK
ro.product.ota.model=Lenovo
YB1-X90F
debug.show_anr_dialog=false
log.tag.VibeTonz=ERROR
ro.lenovo.operator=open
ro.yeti.telephony.call=false
ro.lenovo.region=row
ro.lenovo.sim=none
ro.lenovo.tablet=wifi
ro.lenovo.platform=intel
ro.lenovo.bqb=pass
ro.lenovo.cta=false
ro.lenovo.videocall=false
persist.sys.timezone=Asia/Shanghai
persist.sys.language=zh
persist.sys.country=CN
ro.product.locale.language=zh
ro.product.locale.region=CN
persist.sys.dalvik.vm.lib.2=libart
dalvik.vm.isa.x86_64.variant=silvermont
dalvik.vm.isa.x86_64.features=default
dalvik.vm.isa.x86.variant=silvermont
dalvik.vm.isa.x86.features=default
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.expect.recovery_id=0x543ffafdb4f6e02c750f8f5883ce5d8b763f13a3000000000000000000000000