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Questions tagged [ext3]

ext3 (third extended filesystem) is a journaled file system that is commonly used by the Linux kernel.

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how to locate the root cause of a corrupted ext3 filesystem

I have a 4G Compact Flash card with a 2.5G ext3 partition. The file system has become corrupted. I am not necessarily interested in fixing the file system as identifying exactly what is corrupted in ...
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How did my ext3 superblocks get so messed up? And how to fix them?

I've recently found an old external hard disk and I have no idea what's on it. There was only one partition, encrypted with dm-crypt. Luckily I still remembered some of the passphrases that I used ...
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statvfs returns invalid information

My eMMC partition is ext4 formatted and has about 100MB. When I issue statvfs() on that partition, I get huge return value for f_blocks field of struct statvfs. struct statvfs { unsigned long ...
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Cannot mount USB External HD with ext3, possible hardware failure

I'm a Software Engineer with limited SysEng experience. I have a few weeks old "WD 4 TB Elements Portable External Hard Drive", that is a USB 4 TB External HD. I've installed it on Raspberry ...
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1 answer
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How to resize root ext3 file system without LVM

My Debian vmware image has run out of space. I've expanded the disk image but now need to increase my root partition to see the additional space. My volume is setup as follows Disk /dev/sda: 50 GiB, ...
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Issue with device after formatting

I need some help with an SSD disk drive that I am using, or trying to. I encrypted the SSD with cryptsetup, then I forgot about it (there were some files). I rewrote the disk drive completely (using ...
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Why is the EXT3 FS size much smaller vs. partition size?

We have a partition, which is exactly 50 GByte sized: # fdisk -l /dev/sdb Disk /dev/sdb: 50 GiB, 53687091200 bytes, 104857600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/...
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Corrupted ext3 when accessing with ext4 subsystem

I have been facing issues when accessing multiple HDDs with ext3 using the ext4 kernel subsystem. # tune2fs -l /dev/sdj1 tune2fs 1.41.12 (17-May-2010) Filesystem volume name: <none> Last ...
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1 answer
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How to enlarge an ext3/ext4 filesystem through debugfs?

I’m in a situation where I want to enlarge the default size of an ext4 filesystem used by the firmware. The problem is resize2fs is doing extra things like clearing some filesystems features and ...
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2 votes
1 answer
750 views

File timestamps precision - ext3 with nanoseconds, ext4 with milliseconds

People say ext3 supports file timestamp precision up to seconds and ext4 up to nanoseconds. What happens is that my old VPS running Ubuntu 12.04 with an ext3 filesystem always (as far as I can ...
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Can I resize a filesystem without resizing the partion in advance?

Quick question: Can I resize a filesystem without resizing the partition in advance? The question aims at growing, but information on shrinking might be useful for future reference too. Here's the ...
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why can gnome disks not format ext2 or ext3?

Why does the GUI tool for formatting disks have no option to format with ext2 and ext3 filesystems? Why would a tool used for formatting exclude these filesystems? What is the rationale behind this ...
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Are file system such as ext3 stored in SSD sequentially?

There are superblock, group descriptor table, inode bitmap, data bitmap , inode table ,etc. As I understood. these are stored in virtual memory sequentially. Are these metadata(superblock, group ...
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1 answer
230 views

Convert / and /boot from ext3 to btrfs

Is it possible to convert / and /boot file system from ext3 to btrfs? I have not experienced converting previously but I seen that filesystem from ext3 needs to be unmounted. Filesystem ...
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2 votes
1 answer
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disk %util reaches 100% constantly when avgrq-sz is small

On my system with 4.9.86 kernel I have noticed weird behaviour with my disk (HDD with 5400 rpm), the %util goes 100% for quite some time constantly (for 5 minutes or so), I do see the avrg-rq size is ...
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What can cause a difference of 3 gigabytes on two identical trees?

I've just copied a dir tree to another disk with cp -a. This tree is ~70GB big with millions of files, and diff was taking forever to finish, so I was looking for other methods to compare the dirs. ...
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Can I get rid of "ext4-rsv-conversion" process?

uname -a gives: Linux devuan 4.9.0-6-amd64 #1 SMP Debian 4.9.88-1 (2018-04-29) x86_64 GNU/Linux All filesystems on all disks in this box are ext3 (~15T worth over six disks) ps -A gives: ... 14684 ? ...
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How to convert USB driver from ext3 to ext2 without losing data?

This USB driver has two partitions, one is ext3 and another NTFS. Now I want to convert the ext3 partition to ext2, is it possible? The partition has around 200G data and I have no spare disk or ...
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filesystems: recovering filenames from ext4 when there is no root inode or journal?

The root inode and journal have both been wiped from my ext4 filesystem accidentally when I zeroed the first few megabytes of my partition. My data, however, has all been successfully recovered with ...
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Corrupt SD-card on embedded linux

I'm working on an EmbeddedArm TS-7553 ARM device, running a 2.6.24 Linux. I'm developing on an Ubuntu 14.04 32bit virtual VirtualBux guest. I downloaded their SD-card image (2gbsd-noeclipse-mar292017....
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2 votes
3 answers
765 views

Is there any way to perform fsck automatically after power failure?

I have a USB HDD with an ext3 file system, (it's a Plex server media drive), connected to my Raspberry Pi, and after power failure it is not mounting automatically and has a superblock reading problem....
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3 votes
1 answer
702 views

Recovering a file on ext3

This is actually a ctf game: Enigma 2017 practice at hackcenter.com We have to recover a deleted file on ext3. I am following this tutorial. The inode is 1036. istat gives Group 0 fsstat undelete....
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9 votes
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Permission denied for only a single file in a directory as root user on an ext3 filesystem under RAIDiator OS

I have a ReadyNAS box named "storage" that I believe is based on Debian. I can ssh into it as root. I'm trying to reconfigure the webserver, but I'm running into a file permissions problem that I ...
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Why is a filesystem type ext3/ext4 simultaneously?

My root directory looks like that: When I installed Ubuntu I create partition as ext4, but now it shows: Filesystem type:ext3/ext4. Another thing is that the pie chart shows three chart and ...
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How do I get ext3/ext4 filesystem features to apply in mke2fs?

As many of you know, ext3/ext4 have filesystem features that make up the special functionalities that they have already, some of these features you can get them from "dumpe2fs", for example this ...
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Access a physical Ext3 drive under Windows host system for defrag?

Access a physical Ext3 drive under Windows host system for defrag? Note: Debunking the myth of Linux Filesystems not getting fragmented. http://www.webupd8.org/2010/03/install-defrag-...
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1 answer
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What is the most recent technique to implement quotas?

Is the quota approach still in use to limit the usage of disk space and/or the concurrency between users. Quota works with aquota.user files in the concerned directories AND some settings in /etc/...
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1 answer
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"mounting ext3 file system using the ext4 subsystem" - what does this mean exactly?

I am running Ubuntu 16.04.1, and my main partition is formatted as ext3. Checking syslog I see : mounting ext3 file system using the ext4 subsystem does this mean that the partition is mounted as ext4?...
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Why is formatting a USB as FAT32 quicker than formatting as EXT3?

I often use gparted to format my USBs. Whenever I format a USB as FAT32, it takes just a few seconds to complete. Whenever I format a USB as EXT3, it takes a few minutes to complete. Why is there such ...
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8 votes
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Optimize ext4 for always full operation

Our application writes data to disk as a huge ring buffer (30 to 150TB); writing new files while deleting old files. As such, by definition, the disk is always "near full". The writer process ...
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2 votes
1 answer
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No such file or directory for files with accented characters

I am just trying to salvage files off the disk I pulled from a dying Maxtor Shared Storage enclosure (failed to come back up after powering it off, presumably because the OS image on the disk got ...
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2 votes
1 answer
517 views

correct method to corrupt super block in ext3 filesystem associated with drbd

I am trying to simulate file system super block corruption. During this experiment I could not understand the difference between below super block corruption. Please help to know the difference. A ...
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2 votes
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Finding files contained in particular block group

How do I see/list what files have blocks in a particular block group? I'm looking at a small disk image with an ext3 file system. Can I use debugfs, and if so, how?
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How to Change Settings To Allow Writing To USB Hard Drive In Debian

I have a external USB hard drive formatted in ext3 that I would like to use with my Debian Jessie system. By default the system will automount a USB hard drive in read-only mode when I plug in the USB ...
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3 votes
2 answers
2k views

Are hard links for directories possible on ext2/3/4 filesystems?

I've read that the command (and perhaps the system call, too) for creating hard links will not let one create hard links for directories. I also understand that hard links can pose problems for path-...
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2 votes
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Theoretical minimal number of blocks in group - ext2

I have a theoretical question. I don't know if it is proper place for it, but I think that you can help me :) If minimal number of busy blocks in each group is always > 3 ? Honestly, I have no ...
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10 votes
1 answer
19k views

Difference between installing GRUB on MBR sector or first sector on boot partition?

Kickstart gives two options to install the GRUB bootloader either on "MBR" or "first sector of /boot partition". If we choose to install it on /boot partition then what would 512 bytes of MBR contain?...
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General ratio regarding FS <-> LV

Based on New FS size differs from LV size We need a 4 GByte sized FS on top of an LV. OS: RHEL6, 64bit. Question: How big LV is needed to have a 4096 MByte sized FS on it? Are there any percentages ...
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1 vote
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323 views

Are there any size restrictions when increasing an EXT3 File System?

I have a volume group, which has a size of approximately 30 TByte. It has an EXT3 File System on it: SERVER:/home/usfman # dumpe2fs -h /dev/mapper/datavg-foolv dumpe2fs 1.41.9 (22-Aug-2009) ...
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3 votes
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set partition bootable with gdisk GPT

Using GPT, how do I set this disk: sda1 ext3 FUJITSUMHV2080B so that the partition is bootable? Or, do I need to reformat using the install disk?
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Add AFP shares to ext3 partition

Is it possible to add an AFP service / protocol to an existing ext3 partition? I have a linux server that I want to share with Apple clients. The clients want to use TIME MACHINE which will only ...
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How to create a disk image with a partition table that can be easily resized to the target device?

I want to create a disk image with two partition, boot partition and rootfs partition. I want boot to be a fixed size and rootfs to be easily resizeable to fill the target device after the image is ...
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Ext3 system calls during file creation and modification [closed]

I'm trying to learn more about Linux and its file system and I'm stuck on understanding the difference between the ext3 and ext2 file systems with regards to system calls during file creation and ...
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3 votes
2 answers
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MDADM RAID 0 Failure

Last night I noticed my system clock on my Ubuntu Server was 5 minutes fast so I ran an 'ntpdate pool.ntp.org' command and went to bed. This morning I noticed that SAMBA shares were not working. ...
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2 votes
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How do distribution installers avoid ext2/3/4 initialization?

When I format a volume with ext4, I have two options regarding initialization. I can either use lazy_itable_init=1 (the default setting) to delay initialization until after the volume is first mounted,...
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What happens to directory entry when a file is renamed [closed]

What exactly happens to the directory entry when a file is renamed? Is it that the entry of the oldfile is flushed and the newfile is replaced at it's place or a completely new entry is made at the ...
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3 votes
1 answer
1k views

ext3 vs ext4 - same disk size, less usable disk space under ext4 comparing to ext3. why?

Files copied from ext3 filesystem do not fit on same size ext4 filesystem. How to reproduce: create two 1GB files, setup loop device for each, create filesystem one ext3, one ext4, mount, rsync ...
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8 votes
4 answers
5k views

How do I create small disk image with large partitions

I am building a disk image for an embedded system (to be placed on an 4GB SD card). I want the system to have two partitions. A 'Root'(200Mb), and a 'Data' partition(800Mb). I create an empty 1GB ...
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Delete and recreate of NTFS file format in Extended partition will maintain driver letter?

One of my computer system is having the disk partition like below 1-Primary (NTFS) (boot) 2-Primary (NTFS) (Windows C: Drive) (windows XP OS) + (software installed) 3-Primary (NTFS) (Windows D: ...
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Ext3 Journaling Question on inode and disk layout

I have the following questions about Journaling and JBD(journaling block device): Why Journal Inode number comes as 8 when we do ./dumpe2fs? Where on disk partition do we store journaled blocks? ...
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