Develop Bugs

Can't mount block /dev/block/mmcblk0

Basically, every time I go to clockwork recovery and try to wipe data and cache, I get this error.
cant mount block /dev/block/mmcblk0
I have reformatted many times my sd, even with rom manager but with no luck.
Still get the same error.
From what I understand, if I flash a rom that supports aps2sd+ then I cant install any apps from market because it cannot mount my sd card.

You probably have an ext2 partition which clockwork can't handle. I had to convert mine to ext3 to be able to format it in recovery. Apps were still being saved there, though.
Sent from my HTC Desire using Tapatalk

jastonas said:
Basically, every time I go to clockwork recovery and try to wipe data and cache, I get this error.
cant mount block /dev/block/mmcblk0
I have reformatted many times my sd, even with rom manager but with no luck.
Still get the same error.
From what I understand, if I flash a rom that supports aps2sd+ then I cant install any apps from market because it cannot mount my sd card.
Click to expand...
Click to collapse
I had this problem while my ext was ext4. I had a ROM that was OK using ext4 but clockwork wouldn't back it up, so I reformated SD with ext3.
Sent from my HTC Desire using XDA App

pexon said:
I had this problem while my ext was ext4. I had a ROM that was OK using ext4 but clockwork wouldn't back it up, so I reformated SD with ext3.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Everything ok now....
Sent from my HTC Desire using XDA App

s2e cant find my sd-ext partition

i formatted my sdcard then i made and sd-ext partition trough cwm 5.0.2.6
and s2e cant seem to find it.

oop i accidently posted it twice delete this one please op

Make it with partition wizard, not cwm
Sent from my GT-S5660 using xda premium

Can't Format to Ext4

i try to partition my sdcard to ext4
with amonra recovery i try to partition to ext2 - ext3 and then ext3 - ext4
when formating to ext3 i can mount the sdcard , but when i formating to ext4, sdcard wont mounting.
and i can't make a2sd programs works well.. as well in Titanium Backup ext partition not show.
can all u help me?
#sory my bad english
EDIT: i'm using sandisk ultra 8gb class 10 sdcard

seethegoeh said:
i try to partition my sdcard to ext4
with amonra recovery i try to partition to ext2 - ext3 and then ext3 - ext4
when formating to ext3 i can mount the sdcard , but when i formating to ext4, sdcard wont mounting.
and i can't make a2sd programs works well.. as well in Titanium Backup ext partition not show.
can all u help me?
#sory my bad english
Click to expand...
Click to collapse
Go to 'mount' in Recovery, mount /sdcard, and try again.

MBQsniper said:
Go to 'mount' in Recovery, mount /sdcard, and try again.
Click to expand...
Click to collapse
already tried but still can't mount..
is evo can read ext4 partition? or only ext3?
which one is better, ext3 or ext4?
are u using ext4 partition? how do you do it?

Are you on a kernel that supports ext4?

ca1ne said:
Are you on a kernel that supports ext4?
Click to expand...
Click to collapse
i dunno about that..
but i'm using EnergyRom with ChopSuey kernel..
so not every kernel can supports ext4?
which kernels should I use for my supersonic to supports ext4?

I know the Mason kernel supports ext. 4. Read the OP for the ROM you're using and make sure ext. 4 is supported.
Sent using my HTC EVO 4G and a magic wand

seethegoeh said:
i dunno about that..
but i'm using EnergyRom with ChopSuey kernel..
so not every kernel can supports ext4?
which kernels should I use for my supersonic to supports ext4?
Click to expand...
Click to collapse
If its a sense rom only underworld kernel and classic kernel support ext 4 and if its aosp rom mostly every kernel supports it.
Sent from my PC36100 using xda app-developers app

Scratch what I said above. I forgot Energy is a Sense ROM, so you'll need a Sense ROM that supports ext. 4, assuming it's supported by the ROM.
Sent using my HTC EVO 4G and a magic wand

FinZ28 said:
Scratch what I said above. I forgot Energy is a Sense ROM, so you'll need a Sense ROM that supports ext. 4, assuming it's supported by the ROM.
Sent using my HTC EVO 4G and a magic wand
Click to expand...
Click to collapse
All roms with a2sd support it and that's most roms all you need is kernel support
Sent from my PC36100 using xda app-developers app

evo4gnoob said:
All roms with a2sd support it and that's most roms all you need is kernel support
Sent from my PC36100 using xda app-developers app
Click to expand...
Click to collapse
ok il'll try to try another kernels..
but the problems is, the sdcard won't mount in recovery menu when format to ext4..
if i format to ext2 or ext3, recovery can mount sdcard..
so.. what is the problems? recovery or kernels? who that make the sdcard can't mount...

seethegoeh said:
ok il'll try to try another kernels..
but the problems is, the sdcard won't mount in recovery menu when format to ext4..
if i format to ext2 or ext3, recovery can mount sdcard..
so.. what is the problems? recovery or kernels? who that make the sdcard can't mount...
Click to expand...
Click to collapse
1. Maybe your card doesn't support ext3 or
2. Format the whole card after you back up everything on it. Then do the partion and then move everything back to the SD card
3. Update ext1 to ext2
4. Wipe using superwipe or whatever method you use, flash the rom, same session flash your kernal underworld number 8 for your sense rom, then same session flash your apps2sd script I use cronmod INT2EXT4+ it moves your partion to your internal memory and I have 900mb on my internal memory 300 apps installed and 400mb of internal memory left and because its internal my phone is fast as hell with no lag.. then reboot and take a look around to see if the script stuck.. if so then get rid of armon installer use smelkous recovery you can go back into it and update your partion without having to format your SD card again.. so then you would update to ext3 but you may have to uninstall your app2sd script and then reflash it once you get your ext4 up and running.. I will link cronmod so you can read the op he also has a app2sd script as well
Sent from my PC36100 using Tapatalk 2
---------- Post added at 08:20 AM ---------- Previous post was at 08:20 AM ----------
http://forum.xda-developers.com/showthread.php?t=1716124
Sent from my PC36100 using Tapatalk 2

monty_python said:
1. Maybe your card doesn't support ext3 or
2. Format the whole card after you back up everything on it. Then do the partion and then move everything back to the SD card
3. Update ext1 to ext2
4. Wipe using superwipe or whatever method you use, flash the rom, same session flash your kernal underworld number 8 for your sense rom, then same session flash your apps2sd script I use cronmod INT2EXT4+ it moves your partion to your internal memory and I have 900mb on my internal memory 300 apps installed and 400mb of internal memory left and because its internal my phone is fast as hell with no lag.. then reboot and take a look around to see if the script stuck.. if so then get rid of armon installer use smelkous recovery you can go back into it and update your partion without having to format your SD card again.. so then you would update to ext3 but you may have to uninstall your app2sd script and then reflash it once you get your ext4 up and running.. I will link cronmod so you can read the op he also has a app2sd script as well
Sent from my PC36100 using Tapatalk 2
---------- Post added at 08:20 AM ---------- Previous post was at 08:20 AM ----------
http://forum.xda-developers.com/showthread.php?t=1716124
Sent from my PC36100 using Tapatalk 2
Click to expand...
Click to collapse
Nice..I will test it..
Big thanks..
Edit: how do I know that my sdcard was formated to ext2/ext3 or ext4?
Sent from my PC36100 using xda premium

seethegoeh said:
Nice..I will test it..
Big thanks..
Edit: how do I know that my sdcard was formated to ext2/ext3 or ext4?
Sent from my PC36100 using xda premium
Click to expand...
Click to collapse
Just look for smelkous 4.2 I believe it is, I think its pretty str8 forward as far as ext upgrades if its capable of being upgraded to ext3 or ext4, but not all SD cards can be updraded to ext 3 or 4
Sent from my PC36100 using Tapatalk 2

monty_python said:
Just look for smelkous 4.2 I believe it is, I think its pretty str8 forward as far as ext upgrades if its capable of being upgraded to ext3 or ext4, but not all SD cards can be updraded to ext 3 or 4
Sent from my PC36100 using Tapatalk 2
Click to expand...
Click to collapse
I mean, how to detect that my sdcard in ext4 partition position? Any apps to detect that?
Sent from my PC36100 using xda premium

Use terminal emulator
Type su, hit enter
Then, a2sd check.
Should tell you your ext
An enviousOG

[Q] CWM Recovery can't backup sd-ext partition (via Nandroid)

I created the SDCard partitions using ClockWorkMod v5.0.2.0, now when I try to take a Nandroid backup,it works through all the partitions, until sd-ext and gives the following error :
"Could not mount sd-ext. sd-ext backup may not be supported on this device. Skipping backup of sd-ext" followed by the usual "Generating md5 sum..."
Click to expand...
Click to collapse
I have a 512 MB Ext .Phone recognizes the sd-ext without any problem. I have mounted and configured it using S2E.
WTH is going wrong ?Any ideas ?
Thanks

optimusodd said:
I created the SDCard partitions using ClockWorkMod v5.0.2.0, now when I try to take a Nandroid backup,it works through all the partitions, until sd-ext and gives the following error :
I have a 512 MB Ext .Phone recognizes the sd-ext without any problem. I have mounted and configured it using S2E.
WTH is going wrong ?Any ideas ?
Thanks
Click to expand...
Click to collapse
S2E here, too - how did you partition the card - CWM? (I'd guess usually that shouldn't lead into problems...)
Did you also mount the partition manually in CWM? (I'm pretty sure that I didn't - but that's still an open question / if I have to / should) - what CWM version?

eventcom said:
S2E here, too - how did you partition the card - CWM? (I'd guess usually that shouldn't lead into problems...)
Did you also mount the partition manually in CWM? (I'm pretty sure that I didn't - but that's still an open question / if I have to / should) - what CWM version?
Click to expand...
Click to collapse
Yep,obviously,I used CWM 5.0.2.0 for the partition of the card.
I am using CWM 5.0.2.0 for the Nandroid backup and I have also tried via ROM manager to no avail.
SD-Ext is already mounted
Hbu?Have you achieved the Nandroid backup(including ext) without any problem ?What CWM did you use ?

I just don't understand why CWM can't back it up when it was created by itslef.
Does CWM 5.0.2.0 supports ext3/4 ?
I am pretty sure I created ext3 partiton using it and now when I mount my SD card via ADB,it shows the file system as ext2

optimusodd said:
I just don't understand why CWM can't back it up when it was created by itslef.
Click to expand...
Click to collapse
Have you made nandroid with cwm 5.0.2.0 ?

Yep

Then surely it looks some issue with your SD-ext,I would recommend you to repartition using minitool partition wizard,For now you could use app extractor app to restore your apps/data from nandroid.

you can try cwm 5.0.2.8 (the latest available) this is the link of the tread
http://forum.xda-developers.com/showthread.php?t=1566677
I know that the recovery have some problems creating / formatting partitions ext (eg creates ext4 but reformat in ext3 when you wipe), then I suggest GParted utility on the ubuntu live cd to partition the microsd.

Wasimk32 said:
Then surely it looks some issue with your SD-ext,I would recommend you to repartition using minitool partition wizard,For now you could use app extractor app to restore your apps/data from nandroid.
Click to expand...
Click to collapse
BTW,I have already backed up my applications using TB and the app data should be in internal memory as it was not moved to ext.
I just want to have the recovery fixed to backup.
You can't just copy the whole SD card on the PC as it can't read the sdext# directory.
Most of the people recommend CWM for the partiton of the card and they didn't have any problem with that.Which recovery did you use ?
Doh! I am clueless

tb save the app to a folder on fat32 (microsd) You must backup this partition before reformatting the entire micro sd or use gparted to erase/formatting only the ext partition

quack75 said:
you can try cwm 5.0.2.8 (the latest available) this is the link of the tread
http://forum.xda-developers.com/showthread.php?t=1566677
I know that the recovery have some problems creating / formatting partitions ext (eg creates ext4 but reformat in ext3 when you wipe), then I suggest GParted utility on the ubuntu live cd to partition the microsd.
Click to expand...
Click to collapse
I try to flash the recovery first.

optimusodd said:
I try to flash the recovery first.
Click to expand...
Click to collapse
good idea :good:
you are s off then PC49IMG.zip is easy to use
tries but does not work for everyone else you have to use adb:highfive:

quack75 said:
tb save the app to a folder on fat32 (microsd) You must backup this partition before reformatting the entire micro sd or use gparted to erase/formatting only the ext partition
Click to expand...
Click to collapse
I have already backed up my SD card on PC.
you are s off then PC49IMG.zip is easy to use
tries but does not work for everyone else you have to use adb
Click to expand...
Click to collapse
I prefer FASTBOOT

I had been using cwm 5.0.2.8 for a long time with no issues while backing up and restoring nandroid including sd-ext.
But due to mirroring bug in temporary 2.5.0.7 with 5.0.2.8,i downgraded to v5.0.2.0.
From then I started to have problems in restoring nandroids made previously with v5.0.2.8.I did everything again(partitioning,backup and restore) with 5.0.2.0,and it all started to work as before again.
So,I jumped to a conclusion that if you create sd-ext with specific cwm version then you should use the same version to backup or restore nandroids.
I know this sounds silly but proved to be good in my case.I might be wrong though.

Wasimk32 said:
I had been using cwm 5.0.2.8 for a long time with no issues while backing up and restoring nandroid including sd-ext.
But due to mirroring bug in temporary 2.5.0.7 with 5.0.2.8,i downgraded to v5.0.2.0.
From then I started to have problems in restoring nandroids made previously with v5.0.2.8.I did everything again(partitioning,backup and restore) with 5.0.2.0,and it all started to work as before again.
So,I jumped to a conclusion that if you create sd-ext with specific cwm version then you should use the same version to backup or restore nandroids.
I know this sounds silly but proved to be good in my case.I might be wrong though.
Click to expand...
Click to collapse
my experience with cwm 5.0.2.8 I restore old backups made with 4.0.1.4 without any problems and found it very useful for advanced restore

Flashed recovery 5.0.2.8,now when i try to backup(nandroid) it goes like this :
Backing up boot image...
Backing up recovery image...
Backing up system...
MildlyAlarming.ogg
Click to expand...
Click to collapse
Nothing happens after that(waited for 30 mints) and when i try to reboot the device it gets stuck on htc logo for few mints and then boot into recovery.
Doh!Seriously,I am fed up with this ****.

optimusodd said:
Flashed recovery 5.0.2.8,now when i try to backup(nandroid) it goes like this :
Nothing happens after that(waited for 30 mints) and when i try to reboot the device it gets stuck on htc logo for few mints and then boot into recovery.
Doh!Seriously,I am fed up with this ****.
Click to expand...
Click to collapse
best bet is to re partition.

sorry for the late reply
optimusodd said:
Most of the people recommend CWM for the partiton of the card and they didn't have any problem with that.Which recovery did you use ?
Click to expand...
Click to collapse
I'm using 4.0.1.4 - by accident because of that wrong PC49IMG file in the index thread and I'm really too lazy to update.
Re. your problems: There are a few reports that CWM (all versions) sometimes fails with wiping/formatting (or does it a bit dirty) so I'd guess this very likely could also happen with partitioning (if I'm correct the partitions will be wiped and formatted also, then). I really would just repartition again - and afterwards I'd do a complete wipe/format of the sd-ext - just to make sure...
Keep in mind that a sdcard is not a hard drive...

Hello, first calm down, you have just installed a recovery
second probably the trouble (as you have already said) is the card, the formatting you? if you do not want to lose the data on your ext partition with gparted can copy them like a fat partition
even if given the situation I suggest you start from scratch. deep Formatting
partition with ubuntu live cd and flash the rom (I understand that will not boot up right? The ext partition is recognized as the first boot). There is a possibility that the micro sd does not work well anyway good luck I hope I can help you
Inviato dal mio HTC Wildfire con Tapatalk 2

/dev/block/mmcblk0p2 - sde-ext error!

Hi, I've got a problem on my HTC Desire.
When i try to clean delvik or wipe sd-ext, i have an error like this:
Code:
E: Can't mount /dev/block/mmcblk0p2
(File exists)
Error mounting /sd-ext/!
I've tried to format SD card (made ext3 as primary), but no dice - still can;t mount sd-ext.
It is possible now to install ROM (LeeDroid), but ut freezes on bootscreen.
HELP!

What did u use to partition ur sdcard?
Sent from my non-Jelly & Icecream HTC Desire

Why is the ext primary the fat partition needs to be the first partition on sd card.

Same Problem With Me!
i have the same problem. partitioned my SD card for ext4 512MB n rest FAT32. i used Gparted Linux OS for this as described in Android Development Post: [Video Tutorial] Noob Proof Everything Desire Guide UPDATED [04/04/11][Video Tut]
http://forum.xda-developers.com/showthread.php?t=1016084
followed each n every step. using ICS 4.0.4 by Sandvold.
http://forum.xda-developers.com/showthread.php?t=1355660
when i try to use ext4 it says:
E: Can't mount /dev/block/mmcblk0p2
(File exists)
Error mounting /sd-ext/!
plzzzzzzzz help! using HTC Desire!

Like colin says Fat32 first then ext partition second. Try using 4ext recovery to partition sdcard, it does the job perfect
Sent from my non - JB HTC Desire

jmcclue said:
What did u use to partition ur sdcard?
Sent from my non-Jelly & Icecream HTC Desire
Click to expand...
Click to collapse
Mini tool partition wizard HE.
I've found the info, that both partitions have to be set as "primary".
I had FAT 32 as primary, and ext3 as logical, but it didn't work either.
I will try to set ext4 instead of ext3, maybe that would work. I'll let you know in the evening CET.

thats ur problem, minitool, it creates bad partitions and dont align them properly. use 4ext recovery, works perfect.
Sent from my HTC Desire

4ext recovery failed to solve the problem!
jmcclue said:
thats ur problem, minitool, it creates bad partitions and dont align them properly. use 4ext recovery, works perfect.
Sent from my HTC Desire
Click to expand...
Click to collapse
i used 4ext recovery.... but still same problem!
can u suggest something different or step by step?
i used both ext4 n ext3.... but didnt helped!

What he means is, use the recovery named 4EXTRecovery. Search for the recovery image here in xda or google it, then flash it via fastboot OR download the 4EXTRecovery Updater from here if your current rom is rooted. (you can also use the updater to just download the recovery image in case your current rom ist not rooted). Then boot into recovery and partition your sd, first partition fat32, second 4ext.
BTW primary in this context doesn't mean first partition, but means that the partition type is primary (as opposed to logical).