You typically need root access to see things in the /cache/recovery directory, but I've seen some devices that do not.
Here's what things look like on my N5:
Code:
shell@hammerhead:/ $ [B][COLOR="Blue"]ll /cache/recovery[/COLOR][/B]
ll /cache/recovery
/cache/recovery: Permission denied
1|shell@hammerhead:/ $ [COLOR="blue"][B]su[/B][/COLOR]
su
root@hammerhead:/ # [COLOR="blue"][B]ll /cache/recovery[/B][/COLOR]
ll /cache/recovery
-rw-r--r-- root root 0 1970-01-28 16:55 last_install
-rw------- root root 5 1970-01-25 23:37 last_locale
-rw-r----- root root 164699 1970-01-28 16:55 last_log
-rw-r----- root root 165998 1970-01-28 13:07 last_log.1
-rw-r----- root root 573643 1970-01-27 13:55 last_log.2
-rw-r----- root root 6578 1970-01-25 22:41 last_log.3
root@hammerhead:/ #
The "last_log" file should contain the goodies, but I'm guessing they roll-over after every reboot, so grabbing them all would be a good idea.
edit: oh, you'd want to grab these files soon (preferably immediately) after one of your OTA installation sessions so we can be sure that one of them will contain the information about what's going on.
It's been hours since I updated the phone, but I could give you my logs in a text form. Here it is:
...................................................................................................
Starting recovery on Mon May 5 12:43:12 2014
recovery filesystem table
=========================
0 /tmp ramdisk (null) (null) 0
1 /data ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/userdata (null) 0
2 /cache ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/cache (null) 0
3 /system ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/system (null) 0
4 /misc emmc /dev/block/platform/omap/omap_hsmmc.1/by-name/misc (null) 0
5 /persist ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/persist (null) 0
6 /mlt ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/mlt (null) 0
7 /dvp ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/divxkey (null) 0
8 /ve ext4 /dev/block/platform/omap/omap_hsmmc.1/by-name/ve (null) 0
9 /boot emmc /dev/block/platform/omap/omap_hsmmc.1/by-name/boot (null) 0
10 /recovery emmc /dev/block/platform/omap/omap_hsmmc.1/by-name/recovery (null) 0
I:Boot command: boot-recovery
I:Got arguments from /cache/recovery/command
framebuffer: fd 4 (540 x 960)
[RAINEDAY]Display_Width = 540
[RAINEDAY]bnr_recovery = 0, bnr_recovery_s = 0
backup_img = /cache/7c3d73ff84aead1a3ab54509d7528a5042144b5f.ota_update.zip
E:missing bitmap /cache/7c3d73ff84aead1a3ab54509d7528a5042144b5f.ota_update.zip
(Code -1)
END OF while ~~~
Command: "/sbin/recovery" "--update_package=/cache/7c3d73ff84aead1a3ab54509d7528a5042144b5f.ota_update.zip"
ro.boot.serialno=016073271601501A
ro.serialno=016073271601501A
ro.bootmode=unknown
ro.baseband=unknown
ro.bootloader=unknown
ro.hardware=lgep769board
ro.revision=6
ro.factorytest=0
ro.lge.hidden_resetmode=0
ro.secure=1
ro.allow.mock.location=0
ro.debuggable=0
EXTERNAL_STORAGE_MOUNT=/storage/sdcard0
EXTERNAL_ADD_STORAGE_MOUNT=/storage/external_SD
persist.sys.usb.config=mtp_only
ro.build.id=JZO54K
ro.build.display.id=JZO54K
ro.build.version.incremental=LGMS76910e.4E255E4D
ro.build.version.sdk=16
ro.build.version.codename=REL
ro.build.version.release=4.1.2
ro.build.date=2013. 11. 07. (목) 18:21:37 KST
ro.build.date.utc=1383816097
ro.build.type=user
ro.build.user=sunhong2.kim
ro.build.host=Orange
ro.build.tags=release-keys
ro.product.model=LGMS769
ro.product.brand=MetroPCS
ro.product.name=u2_mpcs_us
ro.product.device=u2
ro.product.board=u2
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=LGE
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=omap4
ro.build.product=u2
ro.build.description=u2_mpcs_us-user 4.1.2 JZO54K LGMS76910e.4E255E4D release-keys
ro.build.fingerprint=MetroPCS/u2_mpcs_us/u2:4.1.2/JZO54K/LGMS76910e.4E255E4D:user/release-keys
ro.build.characteristics=default
wifi.interface=wlan0
dalvik.vm.heapsize=256m
com.ti.omap_enhancement=true
ro.lge.audio_soundexception=true
ro.lge.audio_soundprofile=true
dolby.audio.hdmi.channels=0
persist.sys.account=0
ro.lk.version=LK MAY-2012
af.resampler.quality=3
persist.sys.system_volume_index=7
persist.sys.system_volume_value=0.5957
persist.sys.sound_enable=2
persist.gsm.sms.forcegsm7=0
ro.build.target_country=US
ro.build.target_operator=TMO
ro.build.target_operator_ext=MPCS_TMO
ro.config.ringtone=Lifes_Good.ogg
ro.config.notification_sound=Olive.ogg
ro.config.alarm_alert=Alarm_1.ogg
ro.metropcs.ui=1
wlan.chip.vendor=brcm
wlan.chip.version=bcm4330x
wifi.supplicant_scan_interval=20
wifi.lge.patch=true
wifi.lge.hanglessid=true
wifi.lge.offdelay=false
dhcp.dlna.using=false
wifi.lge.supportp2p5g=no
wifi.lge.cc.table=true
persist.sys.CIQ.enable=0
ro.com.google.clientidbase=android-om-lge
ro.com.google.clientidbase.gmm=android-om-lge
ro.com.google.clientidbase.yt=android-om-lge
ro.com.google.clientidbase.am=android-om-lge
ro.com.google.clientidbase.ms=android-metropcs-us
ro.com.google.gmsversion=4.1_r6
ro.setupwizard.mode=DISABLED
ro.livewallpaper.map=DISABLED
ro.com.google.apphider=off
keyguard.no_require_sim=true
ro.com.android.dataroaming=true
ro.com.android.dateformat=MM-dd-yyyy
ro.carrier=unknown
ro.opengles.version=131072
ro.sf.lcd_density=240
ime_split_keyboard=false
hwui.render_dirty_regions=false
ime_trace_apply=true
ime_vibration_pattern=0:50
ro.device.hapticfeedback=1
ime_onehand_keyboard=no
ro.lge.overlay=true
ro.build.target_ril_platform=ifx
ro.ril.wake_lock_timeout=300000
rild.libpath=/system/lib/lge-ril.so
persist.radio.rr.enable=1
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=64m
ro.lge.swversion=LGMS76910e
ro.lge.basebandversion=L6260_MODEM_SIC_01.1305.00
ro.lge.capp_optimusui=true
ro.lge.capp_core=true
ro.lge.lcd_default_brightness=153
ro.lge.lcd_auto_brightness_mode=false
ro.lge.capp_themeicon=true
ro.lge.capp_drm=true
ro.lge.capp_smartcard=true
ro.lge.capp_smartcard_oma=true
ro.lge.capp_divx_drm=true
ro.lge.capp_almond=true
ro.lge.capp_resource=true
ro.lge.capp_wapservice=true
ro.lge.capp_quickclip_key=true
ro.lge.capp_ghost_finger=true
ro.lge.capp_touch_scroller=true
ro.lge.capp_touch_ldi=true
ro.lge.capp_touch_flcik_noti=true
ro.lge.capp_key_light_off=true
ro.lge.capp_key_exception=true
ro.lge.capp_keyled_timeout=true
ro.lge.capp_valid_batteryid=false
ro.lge.capp_menu_long=true
ro.lge.capp_mdm=true
ro.lge.capp_lockscreen=true
ro.lge.capp_compat=true
ro.lge.capp_bubble_popup=true
ro.lge.capp_smf=true
ro.lge.capp_art=true
lge.signed_image=true
ro.lge.capp_qwindow=true
ro.lge.fonts=true
net.tethering.noprovisioning=false
net.change=net.bt.name
persist.lg.data.fd=
drm.service.enabled=true
ro.lge.capp_smartcard_ac_gp=false
ro.lge.capp_smartcard_ac_gto=true
ro.lge.capp_smartcard_lgril=true
ro.lge.capp_smartcard_uicc=true
ro.lge.capp_smartcard_smartmx=false
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
init.svc.ueventd=running
sys.factory.qem=0
init.svc.brd=running
init.svc.recovery=running
init.svc.adbd=running
Finding update package...
I:Update location: /cache/7c3d73ff84aead1a3ab54509d7528a5042144b5f.ota_update.zip
Opening update package...
I:1 key(s) loaded from /res/keys
Verifying update package...
I:comment is 1666 bytes; signature 1648 bytes from end
I:whole-file signature verified against key 0
I:verify_file returned 0
Installing update...
Verifying current system...
failed to stat "/system/app/MetroAppStore.1.8.1.odex": No such file or directory
file "/system/app/MetroAppStore.1.8.1.odex" doesn't have any of expected sha1 sums; checking cache
failed to stat "/cache/saved.file": No such file or directory
failed to load cache file
script aborted: assert failed: apply_patch_check("/system/app/MetroAppStore.1.8.1.odex", "b3895800b5ea86931abbe63a84375a23be57b447", "5a7c62093f69a5fcbb3b313982b370a21818a58a")
assert failed: apply_patch_check("/system/app/MetroAppStore.1.8.1.odex", "b3895800b5ea86931abbe63a84375a23be57b447", "5a7c62093f69a5fcbb3b313982b370a21818a58a")
E:Error in /cache/7c3d73ff84aead1a3ab54509d7528a5042144b5f.ota_update.zip
(Status 7)
Installation aborted.
I:timed out waiting for key input; rebooting.