Failed to Mount Cache (Invalid Argument)

A year or two back, in the good old days, I was trying to wipe cache partition of my girlfriend’s Nexus 5. I powered off the phone as it was taking too long to clear cache partition. So when I tried to reboot the phone. It got stuck on the start screen where the logo kept on loading, but the phone won’t start. It took me a while to figure out its fix. When I went back to the recovery menu. There I saw this error failed to mount cache (Invalid Argument). I spend some time looking for its fix and it the end I was successful. If you are facing the same issue then try out the below guide to fix failed to mount cache error.

Fix Failed to Mount Cache (Invalid Argument) error on Android Phone:

When this error (Failed to mount cache) occurred on my girlfriend’s LG Nexus 5. I didn’t have any clue on how to fix it. I tried a lot of things, one thing I didn’t try was factory reset as it would have deleted all her data. She didn’t even have a backup of the data, so factory reset wasn’t an option. It had all our memories and messages that we couldn’t afford to lose. I came across failed to mount cache error while trying to wipe cache partition of her nexus phone. So I was sure there must be some issue with the cache formatting.

In order to fix failed to mount cache issue, you have to go to recovery menu and mount system and then clear cache again. It will fix the issue.

If you don’t know how to do that. Follow the step to step guide below to fix failed to mount cache invalid argument error:

Note: The following guide won’t erase your data from the phone. So don’t worry about losing your pictures and contacts while trying out the fix below.

  • First of all, you will have to get into the recovery menu.
  • Press and hold volume down and power button.
  • A screen will appear with Android on the back and “Start” written inside the box which is pointing towards the power button.
  • Now Press Volume down button twice. It will show the recovery menu inside the box.
  • Press the power button to select.
  • Now your phone will reboot and it will show you an Android icon on the back.
  • Press and hold the Power button and tap on Volume Up button.
  • Now you will see the recovery menu. On the bottom of the screen, you will see this error Failed to Mount Cache (invalid argument)
  • Now use volume buttons to navigate to Mount System/Cache. Press the power button to select it.
  • Now navigate to Wipe Cache Partition and press power button.
  • Wait for a while it will wipe your cache partition. Even if it fails to clear cache partition. you will be good to go.

Note: This step can take up to 30 minutes depending on your phone. So just hold your horses and let it clear wipe partition.

  • Now select the option Reboot System Now” from the same screen.

Note: If your phone fails to clear cache again. Just mount system/cache and reboot system. It will work out.

Update (July 7th,2016): I used the above guide to fix my phone when I had the same error. If it is not working for you then you should try flashing stock firmware/software on your phone:

Your phone will reboot and it will start working properly. I have personally used this method to fix failed to mount cache partition on my Nexus 5. I really hope this works for you guys as well.

I personally had this issue on LG Nexus 5. I have seen many people asking me how to fix failed to mount cache error in a number of different Android devices like ASUS and Samsung which I have no clue about. You guys can try the guide above if it didn’t work and your phone is still bricked then try to flash stock firmware on your phone. There are cases when this error arises because of some hardware issue, then you can not fix it by tweaking the software or operating system.

If you have any issue or query regarding how to fix failed to mount cache. Let me know in the comments. If this guide fixed the error. Don’t forget to drop feedback in the comments below. If you know of some other method that can be helpful in fixing this issue, please let us know so we can update the guide.

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yashodhan amare
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yashodhan amare

i m facing same issue , while clearing cache partition my phone get stuck & then i restarted the phone. But phone was not getting on & stuck on cyanogen welcome screen. ( using oneplusone ) then i tried as u guided & still not resolved Actuually i am not able mount cache partition. i am using twrp 3.0.0-0 recovery , in which i selected mount option — then i tried to select cache partition but its not selecting.

what could be issue ??

JAI
Guest
JAI

exactly my problem—I can only select oem and sdcard to mount in twrp

yashodhan amare
Guest
yashodhan amare

Also i dont want loose my data , is there is any option to copy this data to external device ??

can i mount usb device in recovery mode using some linux commands & copy my phone data into that ??

Nathan
Guest
Nathan

First of all thank you for taking the time to post this. I went through all your steps and I am stuck on the last one. It just gets stuck on the formatting /cache message at the bottom of the screen and I cant get out. I have left it for half an hour but it does not leave the screen! WAIT WAIT… it just completed and gave me the option to reboot while I was writing this! Looks like its fixed. Thanks man! you are the best! No idea why the format took half an hour but seems to… Read more »

Abadi
Guest
Abadi

i have same problem. I tried your procedure,but unfortunately didn’t solve it. Same issue still existing

Brar
Guest
Brar

1st of all thanks for this post..
I followed your procedure but problem not solved.
When I click on mount system cache it give same error failed to.mount cache..
Then I select wipe cache then also I give same error failed to mount cache.. Then I select reboot from same menu.. Phone get restart but my problem is not solved it get stucked in logo.

Plzzz help me

Willow
Guest
Willow

Hey, I was like oh this doesn’t work for me either. But as I was searching or answers it worked. Just give it time after you reach the final step. It may say it has failed and it will look as if nothing has changed, but give it time and it eventually gives you the option to restart your phone.

Natalia
Guest

THANK YOU SOOO MUCH… THIS SOLUTION WORKED OUT FOR ME

Alex
Guest
Alex

I have the same issue, i followed your instructions and the problem is remained, the phone it get stuck in the animation(flying dots) screen I charged my Nexus 5 (which is not rooted) when I was going to turn it on it got stuck in the “flying dots” animation. it does not work. I also tried going into recovery mode and doing a wipe cache partition, no result as well. However, when going to the recovery mode, there is the following message at the bottom of the screen: E: failed to mount /cache (invalid argument) E: can’t mount /cache/recovery/log E:… Read more »

Ali
Guest
Ali

Hey bro
I Have Exactly the same problem as you have.
I’m so confused what has happened to my phone…
My Phone Is Samsung Galaxy Mega 6.3
I Installed the Official 4.4.2 KitKat Android using Odin again. But The Problem Still Remained.
Wipe Cache Partition is just 2 secs for me not 30 minutes… everything it shows are Errors! Failed to mound /cache …. (Red Font) and Cache Wipe Complete. (Yellow Font) But nothing happened….

Pedro Santos
Guest
Pedro Santos

I have the exact same issue on my Nexus 7 2013. Tried to wipe cache and restore factory settings and all I get is the same thing you get (below). The guys at ubrokeifix were not able to fix it. Is there any other way such as popping it open and replace the flash memory as it seems the partition table might be corrupt (I don’t know). Google discontinued the Nexus 7 and there are only rumors about a replacement. Any help? – Wiping data… Formatting / data… E: failed to mount / cache (Invalid argument) Formatting / cache… E:… Read more »

Anonymous
Guest
Anonymous

restart your mobile and wait

happy singh
Guest

I m facing the same issue on my karbonn sparkle v when i was updating my system by ota 6.0 to 6.0.1 marshmallow. it couldn’t be updated completely and all of the sudden it stopped. and thereafter, i did the wipe cache partition then

there are the following messages at the bottom of the screen:

E: failed to mount /cache (invalid argument)

E: can’t mount /cache/recovery/log

E: can’t open /cache/recovery/log

E: failed to mount /cache (invalid argument)

E: can’t mount /cache/recovery/last_log

E: can’t open /cache/recovery/last_log

E: failed to mount /cache (invalid argument)

E: can’t mount /cache/recovery/last_install

E: can’t open /cache/recovery/last_install

E: failed to mount /cache (invalid argument)

paresh
Guest
paresh

Same problem with sparkle v

Nathalie
Guest
Nathalie

Thanks for your post. It did not work for me, unfortunately. How do I install the operating system again?

Nathalie
Guest
Nathalie

I have a nexus 5 16 Gb bought in June 2013

Rahim
Guest
Rahim

THANKS!!! This has got to be the easiest fix I found online! You’re the best Abdullah

Shefali
Guest
Shefali

i have the same problem but my device is micromax android one , does the procedure change?

sri
Guest

Hi i got this problem same on my device micromax canvas a1. could u resolved this problem

Shefali B C Baraik
Guest
Shefali B C Baraik

i have the same problem but my device is micromax android one , does the procedure change???

Joerg
Guest
Joerg

I had exactly the same problem on the Nexus 5 running 6.0.1. I followed the advice and was worried at first as the “mount” command returned an error as well. But I proceeded to wipe the cache – and the phone is now rebooting well. Thank you very much for your help!

Amol
Guest
Amol

Thank you. It worked out for me..No need to do factory reset.

Kanchi Gupta
Guest
Kanchi Gupta

Hey! Really desperate here…so well I put my sisters phone on update and well it was updating to 6.0.1 so ofcourse the error thing happened and well I did do all the steps you put in and it still didn’t exit the bootloop….the phones status is locked and it was never really connected to my laptop so the drivers and settings aren’t installed. It is almost impossible to ADB the update and fix it and THE DATA CAN ABSOLUTELY NOT BE LOST.

Do you see any other way?

AA
Guest
AA

I have the same problem on Asus Zenfone 5 A501CG, but i am not getting the mount cache partition option in the recovery menu..
Plz help!

Tray Russell
Guest
Tray Russell

Worked for me! I wasn’t able to get the phone out of the flying lollipop, and this got it booted and it’s doing an update right now. Thank you!!!

DJC
Guest
DJC

Thanks, this worked for me.

Vyacheslav
Guest
Vyacheslav

Thanks, this worked for me too.

Zee Barron
Guest

hello I have a Galaxy Note 8.0 GT-N5110 PLEASE HELP ME!

Derek
Guest
Derek

You made my day !!! Many thx

SoftwareGamers
Guest

I have Dell Venue 8 3830, My phone is softbrick from 3 months. Whenever I try to flash my tablet (I am using Fastboot) when Type command ” fastboot flash system system.img.gz ” It says sending files and after few seconds tablet screen becomes black and nothing happens please help me…!!!

Max Mustermann
Guest
Max Mustermann

I had the same problem with a nexus 5! /cache wasn’t mountable anymore and thus not delete-able. 🙁 Yet I had the hope that a corrupt /cache might be the reason for the device’s boot loop… In Recovery I unfortunately could not erase /cache using the corresponding menu entry, but fastboot should be able to help! What finally solved this issue for me was to follow guide [1] to get the device connected in fastboot mode to my iMac [2], followed by unlocking and erasing the cache. — $ cd ~/Library/Android/sdk/platform-tools/ $ ./fastboot devices 0712f42d0592ee04 fastboot $ ./fastboot oem unlock… Read more »

Tony
Guest
Tony

Hi I have a nexus 5 and the phone got into this situation after a forced update last night.

I really hate these “force feeding” from google as is always trouble. I need to recover my data at least

I followed your tips, but I don’t see the “Mount the Cache” selection as you said.

Any reason why i don’t see that option?

Please advice,
Thanks in advance

Paulina
Guest
Paulina

You are so awesome! I do not believe I’ve read anything like
that before. So wonderful to find somebody with some original thoughts
on this subject matter. Seriously.. many thanks for starting this up.
Thiss web site is one thing that’s needed on the web, someone with
a bit of originality!

basha
Guest
basha

i 2 have same problem rgarding to zenfone 5 T00J
my catch is also cleared and after restarts my mobile it not opening it strucks in the asus logo while buffering in the starting

sonu
Guest
sonu

micromax aq4501 plz help mee

Jatin
Guest
Jatin

Thanks. It worked for me. I cleared the cache partition. Though it was still showing error but after 2-3 minutes the option for rebooting appeared and then I could reboot the phone.

Ryan Wood
Guest

OMG THANK YOU SOO MUCH YOU JUST SAVED ME FROM BUYING A NEW PHONE (AROUND $800). THANKS SOOO MUCH

Mimmi
Guest
Mimmi

It spent a long time to do this but I wiped cache partition completely. Thank you.

Anonymous
Guest
Anonymous

I have the same problem on samsung galaxy s3 I don’t want to lose my data what can I do????

Neena
Guest
Neena

Hello,
My HTC one M9 is facing a boot loop issue. Tried to do a factory reset but the error ” cant mount cache” came up. The phone does not have an mount cache option in the recovery menu. please help

Anonymous
Guest
Anonymous

You sir are a life saver.

Saishyam Menon
Guest

Hi I have a karbonn sparkle v ,
I get the same error when i do all the above steps.
E: can’t open /cache/recovery/ last_log…
E: can’t mount cache
E: failed to mount /cache (invalid argument)
But i don’t see the mount system/ cache option in the recovery menu .
Also could you please provide a link from where i can download stock rom for Karbonn sparkle v Android one , if I need to do that!

Please help.
Thanks

Alessandro
Guest
Alessandro

did u solve? i can’0tt flag/ mount the cache

Thilan kavindu
Guest
Thilan kavindu

It does not solve the problem.

James McLaughlin
Guest
James McLaughlin

I get to the point of unlocking my bootloader and my phone automatically reboots back to the bootloop spinning dots. It stayed like this overnight and when I set it back to bootloader, it was locked again.

syd
Guest
syd

hi man, stil the same after doing what u said, i have tried ADB sideload not workign, i tried cache not woring, i tried mount not working it allreads the same E: failed to mount / cache ( invalid argument)
E: failed to mount / cache / recovery / last-install

Abdullah Akbar Shafi
Guest

May be your phone is hard bricked.

mpo
Guest
mpo

did find a solution

Maryse Lapointe
Guest
Maryse Lapointe

Thank you so much!!!

Karen
Guest
Karen

I have a samsung galaxy tab 2 10.1 and this didnt work with it. I have tried all of the options in the recovery menu and none work.

Alperen Atur
Guest
Alperen Atur

i love you, it worked !

Abdullah Akbar Shafi
Guest

Glad it worked.

Syed Sheraz Bukhari
Guest
Syed Sheraz Bukhari

qmobilez8 bhi y be asy he kr rha h plzz is ka kya kru
qmobile z8 e failed to mount cache invalid argume

dd7rg5
Guest
dd7rg5

first method worked! thanks u so much, i flashed cwm ported by me to my smartphone and i was with bootloop and that error, flashed stock recovery, sme errors, i make the first method and worked, sry for my bad english

Reinhard Schäfer
Guest
Reinhard Schäfer

Thank you very much for your guide. I´ve tried many things to resolve the issue after falshing twrp in the old method with fastboot erase cache…. you´re guide was the way to the solution. After mounting system (new twrp) and wiping cache it´s today important to reboot into recovery and all runs well. I´ve reflashed my rom and i could use my phone as before. All the best for you.