!IMPORTANT! - CHECK FOR POSSIBLE DATA CORRUPTION​
Quick Steps to check for possible data corruption:
1. Navigate to LOST.DIR Folder in Internal/External SD card using any file explorer (My Files, ES File Explorer, Astro Explorer, etc.)
2. If this folder is empty then you have nothing to worry about - no data corruption! Otherwise, delete ALL of these files (Labelled with various numbers)
3. Reboot device/Restart media scan for internal/external SD card
4. If files reappear straight after reboot/rescan, then there's a possibility that there are damaged files located on the phone or your SD card is damaged/error with file system used.
[If LOST.DIR folder remains empty after reboot/rescan then your SD card/DATA is safe]
Locating damaged files:
- Open the file using any file explorer (My Files, ES File Explorer, Astro Explorer, etc.) and choose to open as "Text" [Alternatively, you can connect/mount it to your PC and open the files with notepad]
- Text should indicate location of possible corrupted file, navigate yourself to this file
- Make backup of file on PC
- Reboot device/Restart media scan for internal/external SD card
- Check LOST.DIR again if any files are recreated, if files are again recreated, then move to next section.
SD card is damaged/error with file system used:
- If you are using a lagfix (especially those with EXT2 as LOOPS), then disable them and/or return to the RFS file system.
- Reboot device/Restart media scan for internal/external SD card
- Check LOST.DIR again if any files are recreated, if files are again recreated, then I would suggest you reflash your ROM and repartition/format
- If LOST.DIR files continue to reappear instantly after a reboot/rescan, then I would suggest you flash back to stock and contact your device maker for warranty claims.
Possible Causes for creation of files in LOST.DIR:
- Improperly turning off device, such as pulling out battery when device is still on
- Interrupted media scan
- Files copied for PC were corrupted initially
- Damaged SD Card
- Fake SD card
- Disconnecting your device when mounted as mass storage device to your PC (without first properly unmounting it)
Evidence/Reference: http://tinyurl.com/4bccju4
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x86-Dark said:
I have 1022 files in my LOST.DIR in the Micro SD :/...and only 2 in the sdcard.
I think i have some corruption issues...
Click to expand...
Click to collapse
Having lots of files in your LOST.DIR does not necessarily mean that you have any data corruption - As noted by some users, it is safe to have these files, but I believe if these files continuous reappear in LOST.DIR, right after a reboot, then you have might have a problem
Delete the files, reboot, and navigate back into LOST.DIR folder and if files are recreated then you possibly have data corruption, if LOST.DIR folder remains empty then you do not have to worry about data corruption
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EXTRA INFO (Edited by me - thanks to rschenck for clarification/original post):
The LOST.DIR is where the system stores orphaned, damaged or corrupted files it finds during the file system check as it boots up. It would be expected that most all of you will have at least a few orphaned files in there. They are perfectly safe to delete, however, if after rebooting the system, MORE files are created in LOST.DIR then these aren't orphans, they are corrupted files and could signal a problem.
Hopefully when you delete them, they will not be replaced at reboot and you will gain some peace of mind that their is no evident DATA/SDcard Corruption/failure
This is a very important housekeeping/maintenance procedure to extend the lives of our phone, especially for those using EXT2 or loops.
Best of luck,
Peter
My lost.dir folder is empty.
I didn't use a lagfix for quite some time though.
I only recently used and ext4 lagfix which has been enabled for about a month or so.
Qazz~ said:
My lost.dir folder is empty.
I didn't use a lagfix for quite some time though.
I only recently used and ext4 lagfix which has been enabled for about a month or so.
Click to expand...
Click to collapse
Then your ext4 file system is good to go I'm using ext2 and my lost.dir fodler is empty too
Wrong section and useless post (as it was in speedmode section) as its too panicky and unnecessary (it is perfectly safe to have these files, and even if we have we don't need to remove lagfix, just switch on the brain).
dupel said:
Wrong section and useless post (as it was in speedmode section) as its too panicky and unnecessary (it is perfectly safe to have these files, and even if we have we don't need to remove lagfix, just switch on the brain).
Click to expand...
Click to collapse
Oh .... I'm sorry. If a moderator sees this post as useless then please feel free to delete it. Was just trying to help
my lost.dir is empty, and i haven't use lagfix
I have 1022 files in my LOST.DIR in the Micro SD :/...and only 2 in the sdcard.
I think i have some corruption issues...
/sarcastic mode on
I never wanted find out this thread
/sarcastic mode off
currydude said:
Oh .... I'm sorry. If a moderator sees this post as useless then please feel free to delete it. Was just trying to help
Click to expand...
Click to collapse
Why? I found it so usefull...Thanks!
x86-Dark said:
I have 1022 files in my LOST.DIR in the Micro SD :/...and only 2 in the sdcard.
I think i have some corruption issues...
/sarcastic mode on
I never wanted find out this thread
/sarcastic mode off
Click to expand...
Click to collapse
Having lots of files in your LOST.DIR does not necessarily mean that you have any data corruption.
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Delete the files, reboot, and navigate back into LOST.DIR folder and if files are recreated then you possibly have data corruption, if LOST.DIR folder remains empty then you do not have to worry about data corruption
dupel said:
Wrong section and useless post (as it was in speedmode section) as its too panicky and unnecessary (it is perfectly safe to have these files, and even if we have we don't need to remove lagfix, just switch on the brain).
Click to expand...
Click to collapse
^^
This..perfectly safe.
currydude said:
Having lots of files in your LOST.DIR does not necessarily mean that you have any data corruption.
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Delete the files, reboot, and navigate back into LOST.DIR folder and if files are recreated then you possibly have data corruption, if LOST.DIR folder remains empty then you do not have to worry about data corruption
Click to expand...
Click to collapse
Deleted everything and rebooted...no file has reappeared fheeew!
x86-Dark said:
Deleted everything and rebooted...no file has reappeared fheeew!
Click to expand...
Click to collapse
That's good to hear I hope my post is clear enough .... Again, having lots of files in LOST.DIR does not necessarily mean that your internal/external SD card is damaged, it just means that there has been some form of data corruption and by deleting and reboot, you can confirm that your SD is not damage but instead there has been some data that was corrupted.
I think those files can also be the result of disconnecting your phone when mounted as mass storage device to your pc (without first properly unmounting it)
MarkSGS said:
I think those files can also be the result of disconnecting your phone when mounted as mass storage device to your pc (without first properly unmounting it)
Click to expand...
Click to collapse
Oh yea! I forgot about that too, thank you for your contribution - will add to O.P.
can someone verify this, please?
auralzx said:
can someone verify this, please?
Click to expand...
Click to collapse
If LOST.DIR folder remains empty after reboot/rescan then your SD card/DATA is safe
Having files in the LOST.DIR folder does not mean that your SD card is damaged/data corruption - but if they reappear after reboot/rescan then there's a possibility of it.
Hmm...
I have some files in LOST.DIR folder, some in my internal and many in my external. I have deleted those files in both SD then reboot. My external SD's LOST.DIR remain empty after reboot, but in my internal SD there are 2 files reappear.
I am using ext 4 + ext 2 loops...
Thank you very much for sharing this, I will try to figure it out...
I get 2-3 files in LOST.dir on my internal SD. I have only tried this twice so far. I'm using EXT4. So what now?
Sent from my GT-I9000M using XDA App
No lagfix Eclair lost Dir has a few files in it .
Moved on lagfixed rooted customised etc etc .Six months a few files in Lost Dir .
Yesterday got about a dozen files in the directory . Why well simple all Titanium backup files and i had a problem with a restore on that app .
Conclusion and from OP post any file that gets damaged is moved to this folder .
A folder to keep an eye on just in case as a warning of possible corruption or bigger problems .
jje
TerraBuzz said:
Hmm...
I have some files in LOST.DIR folder, some in my internal and many in my external. I have deleted those files in both SD then reboot. My external SD's LOST.DIR remain empty after reboot, but in my internal SD there are 2 files reappear.
I am using ext 4 + ext 2 loops...
Thank you very much for sharing this, I will try to figure it out...
Click to expand...
Click to collapse
Remove your loops then check LOST.DIR again. (and/or refer to the Locating damaged files section)
#1RAGE said:
I get 2-3 files in LOST.dir on my internal SD. I have only tried this twice so far. I'm using EXT4. So what now?
Sent from my GT-I9000M using XDA App
Click to expand...
Click to collapse
Again, if files do not reappear right after reboot/rescan, then you do not have to worry.
JJEgan said:
.Conclusion and from OP post any file that gets damaged is moved to this folder .
A folder to keep an eye on just in case as a warning of possible corruption or bigger problems
Click to expand...
Click to collapse
Exactly
Hi, recently I try to change my Recovery and for some strange reason I lost "aparently" all my sdcard content because I can't mount from recovery and either from the phone using AndroZip, my question is: if I format the sdcard and lost .android_secure directory I'm able to access my phone without problems?
Cheers and thx in advance
yes you are fine. The .android_secure folder has to do with paid applications and it will be regenerated automatically.
If you move apps to sd, they go in there. You should move any apps that are on sd to internal memory before you delete it
I felt like I needed a signature.... here it is
tvall said:
If you move apps to sd, they go in there. You should move any apps that are on sd to internal memory before you delete it
I felt like I needed a signature.... here it is
Click to expand...
Click to collapse
I must remember that.
Thx all of yours
I created a backup zip file of some images that were in the main sdcard folder that's found within the mnt folder and I was trying to delete said zip file as I thought I'd made a mistake with the zip file and somehow I ended up deleted most of the folders within the sdcard folder!
I checked out the Storage section within settings and it has the following information:
Total space]
13.11GB
Apps
3.28GB
Pictures, videos
245MB
Misc.
8.33GB
Available
1.31GB
Even though the information in the Internal Storage section is correct, when I check my folders using a file explorer software on my device which is rooted and running AOKP, it shows that the folders and files that I deleted are still missing.
Is there anyway to access the internal memory via an ADB-type software that will allow me to recover the files and folders that were deleted by accident as well as let me back up the internal memory to a PC once the recovery is done? (That is, when I can access the damn device as it's being a pain in the ass trying to detect it on my laptop!)
I use Recuva from Piriform located HERE ! It found and restored 234 MP3's that I guess I was pocket deleting on my DHD.
Thanks for the link. I'll check it out as soon as I can get my device recognised on my laptop and netbook!
hi folks,
can anyone explain to me how the the available internal memory is reported in settings->storage on the i9505? mine seems pretty nonsensical.
its reported as follows:
total space 9.25gb
applications 1.74gb
pictures videos 12.54mb
audio 240kb
downloads 20mb
miscellaneous 435mb
available 2.32gb
furthermore, es file explorer is reporting that 6.92gb out of 9.25gb available memory is used, which matches the 2.32gb available reported in settings->storage.
so where is the remaining 4.7gb??!?
i used the sd card analyser in es file explorer to see what's going on and where the data is but adding up all the data there does not account for the missing 4.7gb??
any clues?
whatsisnametake2 said:
hi folks,
can anyone explain to me how the the available internal memory is reported in settings->storage on the i9505? mine seems pretty nonsensical.
its reported as follows:
total space 9.25gb
applications 1.74gb
pictures videos 12.54mb
audio 240kb
downloads 20mb
miscellaneous 435mb
available 2.32gb
furthermore, es file explorer is reporting that 6.92gb out of 9.25gb available memory is used, which matches the 2.32gb available reported in settings->storage.
so where is the remaining 4.7gb??!?
i used the sd card analyser in es file explorer to see what's going on and where the data is but adding up all the data there does not account for the missing 4.7gb??
any clues?
Click to expand...
Click to collapse
Hi,
Have you perhaps made a nandroid backup which saved to your internal memory?
hi malybru. no - i've done nandroid to extSdCard. if i had mistakenly done it to internal, the data would show up in the clockworkmod folder anyway, which it doesn't.
i have flashed to official BTU roms from odin, without wipe, and rooted afterwards each time. could this have anything to do with it?
when i attach the phone to my windows laptop and examine the internal memory in windows explorer, under properties the phone memory is saying 6.92gb used out of 9.25, yet when i select all the files and go to properties, it only adds up to 500-500mb?!?
whatsisnametake2 said:
hi malybru. no - i've done nandroid to extSdCard. if i had mistakenly done it to internal, the data would show up in the clockworkmod folder anyway, which it doesn't.
i have flashed to official BTU roms from odin, without wipe, and rooted afterwards each time. could this have anything to do with it?
when i attach the phone to my windows laptop and examine the internal memory in windows explorer, under properties the phone memory is saying 6.92gb used out of 9.25, yet when i select all the files and go to properties, it only adds up to 500-500mb?!?
Click to expand...
Click to collapse
Hi,
I use a great app from the market,called "FX File Explorer"
It has a "View " button at the bottom of the page which will show you a breakdown of the data on your phone.
Click it when you are in your Main Storage.
It might help to locate some stuff that should not be there.
If not,it's still a great app to have.
yes es file explorer has the same thing. there's no sign anywhere of the missing 4.7gb data! all the files add up to about 600mb.
i still have no clue about this. how about if i backup all the files, reformat internal storage in recovery, copy files back?
i had this problem before.. then i checked data/media.. there should only be 3 folders there which are: 0, legacy and obb.. move every other folder to 0.. hope this helps..
dannyella said:
i had this problem before.. then i checked data/media.. there should only be 3 folders there which are: 0, legacy and obb.. move every other folder to 0.. hope this helps..
Click to expand...
Click to collapse
you sir are a genius. that was it. there was a clockworkmod folder in data/media with a nandroid backup in it. deleted it and missing storage recovered! thanks!
First of all... I wanted to start this post off by saying yes, I know I'm an idiot.
Now that that's out of the way....
A few weeks ago, I got so excited to flash a custom ROM, that somehow when I ran TWRP and backed up my system to the external SD card, I also wiped my external SD card. Because I'm an idiot. I don't know how or why it happened really. I just know it did.
I had previously saved EVERYTHING to my external SD card, thinking that was the safest place for the data... and now the past two years of my life documented in photographs are gone.
I have tweaked out on running custom phone software since the days of the original Razr and flashing Alltel firmware on it... and this is the first major screw up I've ever done.
Now... does TWRP back up that data somewhere, somehow? Or is it just system data/apps that get backed up? If TWRP didn't save it somewhere, is there possibly somewhere that the contents of my external SD card were MOVED upon installation of the custom ROM?
ircphoenix said:
A few weeks ago, I got so excited to flash a custom ROM, that somehow when I ran TWRP and backed up my system to the external SD card, I also wiped my external SD card.
Click to expand...
Click to collapse
You should never store your sole backup copy on the same device as is being backed up as you probably realize now.
Anyway, it's not clear from your post if you were storing a redundant copy of your backup on your external SD card or if you had configured TWRP to use your external SD card as the primary folder and therefore sole backup copy. The default location is usually /data/media/0/TWRP. Try a search for TWRP folders using a root aware file browser. With any luck you will find a backup on your internal SD card.
If not, then the only way to recover would be to try a data recovery program on your external SD card. Unless you do Google /cloud backups as well?
.
Recuva does most of the work well, and there is an option to restore the directory structure too if you poke around in the settings. Puran File Recovery works where Recuva did not in recovering some images and videos.
Both I have tried after an accidental format of the SD card from the phone settings.
They are both free desktop software.
Important to take not not to copy any files over to the affected card, or even your recovered files as well. Only do so when you are sure you have recovered all that you can onto a desktop folder.
Sent from my SM-G900F using Tapatalk
fffft said:
Anyway, it's not clear from your post if you were storing a redundant copy of your backup on your external SD card or if you had configured TWRP to use your external SD card as the primary folder and therefore sole backup copy.
Click to expand...
Click to collapse
The second scenario is what I believe I did. And I think when it created the backup, it wiped the external SD to suit it's needs. Problem being that the Nandroid backup wanted 6 gigs ish of space, and I had 4.5 or so remaining on the internal SD.... don't know what stuff I had on there... but *shrug*
Markuzy said:
Recuva does most of the work well, and there is an option to restore the directory structure too if you poke around in the settings. Puran File Recovery works where Recuva did not in recovering some images and videos.
Click to expand...
Click to collapse
Thank you for the tip. I will try both of these. I think the nandroid backup wrote over the areas on the SD where the pictures were stored. You'd think it would pick the empty space before the occupied space... but I guess since it wiped it clean prior to backing up, it was ALL empty space. *sigh*
Thank you both very much for your help.