The ext4 or fourth extended filesystem is a journaling file system for Linux, developed as the successor to ext3.

learn more… | top users | synonyms

0
votes
0answers
78 views

Data recovery after formating from ntfs to ext

Ok, my 320GB internal laptop HDD was partioned as (1) 20GB partion EXT4 (2) about 290GB extended partion to two NTFS partions (3) 4GB SWAP partion Sure ubuntu is installed on the "EXT" partition ...
1
vote
0answers
67 views

Ext4 Data Recovery Help

My data is on an Ext4 disk that is very corrupt, here is the output from fsck.ext4: http://paste.debian.net/plain/47345 (There are 664 inodes containing multiply-claimed blocks.) Why has this ...
2
votes
1answer
406 views

Recovering a file after having formatted from NTFS to EXT4

I used to have windows 7 but I've recently formatted my hard drive to install kubuntu and I've just realized that I forgot to backup a hidden .dat file which defines my bitcoin wallet. Is it possible ...
0
votes
1answer
2k views

how do i format my hard drive to ntfs from ext4 [duplicate]

I have a usb with my windows ISO loaded and ready. Problem is there is no ntfs partition on my hard drive for windows to load onto. I don't want to complicate things by running 2 operating systems. ...
0
votes
2answers
512 views

Superblock set in the future, fixing system clock

I keep getting errors messages about my Superblock mount time being in the future, and insisting on doing fsck on every boot and I have to go in from the recovery options to do this every time. Here ...
0
votes
1answer
358 views

Change root file-system type (LVM)

I have an Ubuntu 13.04 server configured in this way: % df -TPh ...
2
votes
0answers
13 views

Is there a way to find the LBAs for free blocks in ext4

tune2fs can show the number of free blocks. Is there a method/tool to find the actual logical block addresses for each free block? Thanks in advance
1
vote
1answer
997 views

How to recover files from a partition that was previosuly NTFS under Wndows but after Ubuntu installation had been converted to ext4?

I had accidentally installed Ubuntu 13.04 on Windows 8 while trying to Dual Boot. I had a single partition(973GB) which had windows with NTFS filesystem. But by the accidental install of ubuntu the ...
0
votes
1answer
352 views

How to mount EXT4 drives from another system

I had a testbed 13.04 server which had a boot volume partitioned into three, root, swap and Workspace as well as two other drives running in raid 1. The Workspace and raid volumes were setup using LVM ...
0
votes
2answers
931 views

Trying to mount backup of /dev/sda as ext4 for recovery, fdisk reports invalid partition table

I used dd if=/dev/sda of=~/backup.img where /dev/sda was an ext4 filesystem. I want to perform recovery on it which means I need to mount it as ext4 filesystem using extundelete application. Can ...
2
votes
2answers
2k views

Do I use ext4 for all partitions (such as / and /boot)? What are the other formats used for?

I'm installing ubuntu onto a new laptop with 24gb SSD and a 500gb HDD. I wanted to put / and swap onto the SSD and /home onto the HDD. Is there anything I shouldn't use ext4 for? I do not ever intend ...
0
votes
1answer
641 views

Can not install Ubuntu (13.04 / 12.04) due to ext4 error

I was trying to install Ubuntu 12.04 LTS Desktop 64bit Edition on my new PC. (1TB SATA HDD) I set my mainboard to use BIOS to boot up. At first I tried installing next to Windows 7, got errors. Now I ...
1
vote
1answer
1k views

EXT4 Filesystem seems to have disappeared

I previously had an LVM consisting of a few different drives, including two 4TB Seagate USB's. I migrated my data off the drives. Copy -> Shrink -> Copy -> Shrink Once the drive was removed I ...
0
votes
0answers
140 views

Recover data from a corrupted encrypted hard drive where cfdisk still sees a crypto_LUKS partition

I'm trying to recover files from an encrypted hard drive that seems to have forgotten that it was ext4. When I do a dmesg | grep sd I get: [ 3422.805164] sd 6:0:0:0: [sdb] 488397168 512-byte logical ...
1
vote
2answers
218 views

sha256sum/md5sum gives different results for big files (Ext4/Full disk Encryption)

Yesterday I reinstalled Ubuntu 13.04 64-bit on my computer (4GB RAM), and for the first time I decided to use Full Disk Encryption (all default settings). Today while running backups my computer ...
4
votes
0answers
151 views

How to format an external drive to ext4 in Ubuntu 13.04 [duplicate]

In Ubuntu 13.04 the Disk Utility has been renamed to Disks and has a completely new interface. Using this new version of Disks I want to format my external hard drive to ext4, but the answers to this ...
0
votes
2answers
124 views

Shrinking down ext4 partition not working, Oracle VM (W8 host / Ubuntu 13.04 guest)

I've been trying to follow a myriad of directions all to no avail. I have a 49.4gb drive that is only using 12.1gb of space. I would like to reduce this drive to 20gb in order for it to be used on a ...
0
votes
1answer
257 views

e4defrag - what does output mean?

e4defrag shows many lines like (filename) 100% [ OK ] or (filename) 0% [ NG ], and at finish shows success/failures. Does NG mean it was not moved, OK means it was defragmented? What are the ...
1
vote
2answers
883 views

How can I change permissions on external drives right after formatting with GParted? [duplicate]

Using GParted, I have formatted an external HDD to ext4. As it turns out the default is that I have no write access. How can I change permissions on external drives?
1
vote
1answer
443 views

Mount error on new, empty External HDD - ext4

Apologies if this seems like a very similar question to others already on the site. I have searched for a few hours now for solutions, but nothing seems to be quite the same. I recently (2 days ago) ...
0
votes
0answers
120 views

How to fix ext4 and grub issues?

I had run a fsck for my HDD. Because its lag, I performed a hard restart. After that, I cant boot into my system and its show grub-rescue. I had fixed to repair my ext4 issue, but I still facing my ...
1
vote
1answer
114 views

Is IT possible to make a ext4 external HD completely open?

I bought a new external HD in order to use it like a usb key to exchange files between different computers, and I formatted it using ext4 The problem is that everytime I upload some files I have to ...
1
vote
0answers
814 views

very high IOWait + extremely slow hdparm -tT

I have been running 12.04 on my Fujitsu Siemens Lifebook E751 for almost a year without any problems, and then several days ago I noticed a very high CPU IOwait that makes the system poorly responsive ...
0
votes
1answer
295 views

Simple way to recover a deleted file in a sub-dir of an encrypted home directory (ext4 file-system)

I need a simple way to do it, such as one command or program to which: specify the directory the file was in ask for the list of the recoverable files found specify which files have to be undeleted ...
0
votes
0answers
24 views

Resizing FS failed

Tried to resize a partition according to the following list (resizing from 2TB to 4TB): Unmount fs ('/dev/sdb') run cfdisk and delete partition table in cfdisk create new partition table using all ...
0
votes
1answer
85 views

Does the freequent use of CAT command badly affect the hard disk performance?

One the programs I've written requires merging many files into one, every 3 seconds. The merged file can be bigger than 1GB. I'm using cat command to do this. Cat seems to work pretty fast even ...
0
votes
1answer
236 views

noexec option enabled in fstab is not getting applicable for limited user. Is it a bug?

noexec option enabled in fstab is not getting applicable for limited user. Is it a bug? cat /etc/fstab # / was on /dev/sda2 during installation UUID=fd7e2645-3cc4-4c6c-8b1b-016711c2fd07 / ...
1
vote
4answers
5k views

Ext4 file system format dirve not shows in Windows 8

To install Ubuntu 13.04 formatted a drive with Ext4 file system format. After format it can't open the drive from windows 8 Os login. Whenever I try to open the drive following error shows : Thanks ...
1
vote
1answer
62 views

Does the length of a filename change the amount of space it takes up?

Using a ext3 or ext4 file system, assuming that the files have similar checksums, would the following files: 8c87dba9cf4dbc27c0d54083311ffeef6821e8426f5a8d50165d84f5eef80103.npz 1.npz Take up a ...
1
vote
1answer
235 views

Using Ext4 partitions on external storage

If I want to use a USB flash memory or an external hard disk to transfer data and at the same time I want to use ext4 partitions on them. How could I do that without getting problems regarding ...
1
vote
0answers
259 views

Why's Clonezilla not able to complete the backup of my HDD (ext4)

I have a single HDD with one single partition. What I need is to make an entire backup image of it and burn it to a DVD so that, in case of a messup, I can restore the entire HDD, as it was before. ...
0
votes
0answers
64 views

Inadvertently installed Ubuntu to USB drive, need to recover NTFS FAT

I ran the Ubuntu installer on my desktop PC already running Windows 7. The PC has a 2 TB USB hard drive attached to it that holds pretty much every file I've ever owned. I thought I was installing to ...
1
vote
3answers
3k views

Converting my C:\ to NTFS from EXT4

I was playing with my computer attempting to install Ubuntu 12.04.2 LTS i386, and I accidentally converted my C:\ with Windows on it to EXT4, and Windows hangs on boot. All of windows is still on the ...
2
votes
2answers
80 views

Can I have two internal disks - one ext4 and one ntsf?

Can I have two internal disks - one ext4 and one ntfs? I am putting together a small home server with ubuntu desktop. I also want to use it for windows 7 backups, so if I install a ntsf hdd as well ...
0
votes
1answer
2k views

ext4 partition works but fdisk shows no valid partition table

I have a 1TB disk with a single ext4 partition. here's some output of parted print all command Model: ATA Hitachi HDS72101 (scsi) Disk /dev/sdb: 1000GB Sector size (logical/physical): 512B/4096B ...
3
votes
3answers
126 views

Amount of data written on a partition

Is there any way to find out how much data have been written on the partition since it was created? Talking about ext4 fs.
0
votes
0answers
92 views

setting time from ext4 superblock in embedded system

In an embedded system it seems the battery is not present/working, so I need to get around the 'Superblock last write time is in the future' warning. The time of the system will be set back many ...
0
votes
1answer
454 views

Does copying files from NTFS to EXT4 degrade/corrupt the files?

The reason I ask is I am very new to Ubuntu, but I want to get into mobile development. I installed Ubuntu alongside windows 8 but it just doesn't run quite as well as I would expect so a friend ...
0
votes
0answers
50 views

how to access ext4 partition

i had already installed ubuntu on other partition. in installer i've chosen option "overwrite Windows 7" because i haven't got option to update the ubuntu. How do I access to ext4 partitions of the ...
6
votes
1answer
8k views

How to expand the ext4 primary partition size in a VMware Player virtual disk?

I have a VMware Player virtual machine setup, running Ubuntu 10.04 as the a guest OS. The VM was created on a 20GB virtual drive, with a single partition for working space. Finally I got to the point ...
0
votes
1answer
172 views

Resize ext4 /home partition from start sector

I need to resize my ext4 /home partition to make space to my boot partition before it. The thing is to do so I need to change the start sector of my home partition (the boot partition is extended on ...
2
votes
1answer
173 views

Ubuntu and fat partition, why and can I change it?

I have a mac from 2006 and it is already not supported by new Apple system. So I did get back to Linux and I did chose Ubuntu 13.04. I did install Ubuntu side by side with OSX, but I did notice that ...
0
votes
1answer
274 views

ntfsresize -b -f not working chkdsk /r freezing

I've got a failing hard drive. Don't have the funds atm to buy a new hard drive. So I need to hold up. My main operating system is now ubuntu which is able to run the hard drive fine without any ...
1
vote
2answers
866 views

How to backup Ubuntu partition via Windows?

I wanted to make a backup of my Ubuntu (12.04) partition before upgrading to 13.04, but I've come up against a snag. None of the tools I can find can make an image of the currently-mounted drive - ...
-1
votes
2answers
430 views

Hide ubuntu partition in win7 [closed]

I was searching forum but I didn't find solution to my problem. I've installed Ubuntu 13.04 and Win7 on one HDD in UEFI mode. I'm able to boot in both OS'es separately from grub (added some entries). ...
0
votes
0answers
197 views

ext4 is full but checked OK with fsck and badsector and shows plenty of free space

I need your opinion on this, any idea welcomed: I have a PC with separated / and /home FSs. The root fs has ext4 on sda5, Ubuntu is Precise Pangolin LTS 3.2.0-40-generic-pae. I had a package update ...
0
votes
0answers
117 views

Recovering directory structure from accidental install of Ubuntu 12.10 on ext partition

I mistakenly installed 12.10 Desktop on my 3TB data drive I specified , and upon realizing it, I tried to recover data by looking for the old partition map--which of course was not there. However, I ...
1
vote
1answer
177 views

Hard Disk Formatting Error

so here is the situation.. I installed Ubuntu, pretty sweet.... all was going well till i tried to install an application " LPCXpresso IDE for ARM micro controllers" now the PC hung up as soon as the ...
1
vote
1answer
400 views

Cannot format USB drive to ext4 [duplicate]

i'm trying to format USB drive (some noname 32GB) to EXT4. It always hangs on step writing superblocks ... and always stops writing numbers after it reach to 125/256. I'm use command mkfs.ext4 ...
0
votes
1answer
918 views

How to shrink an ext4 /home partition without using a LiveCD and losing data?

I need to shrink an ext4 /home partition (/dev/sda9) to make space for something else. I would prefer avoid live CDs (boot troubles with new EFI and. I don't have a CD/USB in hand in the office). I ...