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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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1answer
91 views

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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2answers
56 views

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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1answer
163 views

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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1answer
28 views

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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2answers
338 views

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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0answers
94 views

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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3answers
214 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....
3
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1answer
465 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....
10
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1answer
2k views

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 ...
0
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1answer
401 views

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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0answers
464 views

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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1answer
1k views

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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0answers
374 views

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/...
2
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1answer
3k views

“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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2answers
45 views

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 ...
7
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2answers
740 views

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 ...
1
vote
1answer
446 views

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 ...
2
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1answer
302 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 ...
3
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0answers
46 views

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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0answers
40 views

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 ...
0
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2answers
841 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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0answers
62 views

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 ...
6
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1answer
11k 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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1answer
27 views

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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1answer
122 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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0answers
6k views

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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2answers
181 views

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 ...
0
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1answer
197 views

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 ...
1
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1answer
61 views

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 ...
3
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2answers
640 views

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. ...
2
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0answers
96 views

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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0answers
82 views

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 ...
3
votes
1answer
791 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 ...
7
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4answers
3k 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 ...
0
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1answer
158 views

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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0answers
216 views

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? ...
6
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1answer
548 views

How are the reserved GDT blocks used after online resizing in ext3 file system

I am working on Ext3 and after looking at FS layout - ext3 reserves ~1024 blocks as Reserved Group Descriptor Table (reserved GDT blocks are between Group Descriptor blocks and Bitmap blocks). These ...
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0answers
815 views

no ext2/ext3/ext4 directory in /lib/modules/linux version/kernel/fs/

I have installed Linux 3.5 kernel and have compiled e2fsprogs as well. I have my own version of ext3 file system - lets say it is myfs. I have compiled myfs as well. Now I have few questions: How to ...
1
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1answer
1k views

How much space does an inode occupy?

In Windows, when a file/folder is created, it is associated with an FRN (a unique number which is like an Index into the MFT). All the file metadata is stored in the MFT which occupies a reserved size ...
0
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1answer
234 views

Centos missing ext3.ko

Earlier I encountered this error. lv_root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY Which may be caused by the constant power failure here in our office. I fixed it by inserting a centos 6.4 disc ...
3
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2answers
808 views

Unable to mount root filesystem rw with journal

Trying to understand the whole journalling setup and from what I've read and tried, it's eluding me somehow. The root filesystem is ext3. Examining it via tune2fs -l /dev/root shows that '...
2
votes
1answer
1k views

Smallest file block size (ext 3, 4)

I'm curious, what is the smallest size a file can really be on Linux? (Assuming Ext3 fs, so why not ext4 fs as well). Sure you can write a file that only contains one byte, or maybe even less; but ...
0
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2answers
4k views

check if a filesystem is marked dirty

I saw some kernel errors from months ago in syslog that said an inode was marked dirty. I want to fsck the system but a reboot would be undesirable at this time. What sort of checks can I do safely ...
1
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1answer
168 views

Delay before new/modified file appears

I'm seeing two separate cases where there's a (random?) delay before a new or modified file appears. The first case is my Rails development environment: I modify a code file (in vim) and save it, ...
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0answers
1k views

extracting the data block pointed to by an inode fails to correspond to the data in the file [closed]

This question is a spinoff from the following: How to extract raw ext3 inode data from disk? I have a file /tmp/foo, whose contents are a simple text string "AAA". I would like to locate the disk ...
3
votes
1answer
2k views

How to extract raw ext3 inode data from disk?

On an ext3 (or ext2/4, pick your flavor) filesystem, how would one extract raw byte data that corresponds to a particular inode directly from the hard drive? Is it possible given, say, an inode number ...
3
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1answer
173 views

Many transient files on journaled filesystem?

Writing and deleting many files quickly I'm going to write many temporary files per second, over a sustained period. Each will be deleted after some milliseconds. Say we have an image processing ...
1
vote
1answer
3k views

Converting NTFS to Ext3

I recently partitioned a new drive in windows to NTFS. I want to make it ext3 so that I can transfer a WUBI Ubuntu installation onto it. I don't care about the data on this partition. Is there a ...
14
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1answer
13k views

Advantages/disadvantages of increasing “commit” in fstab

I have done many obscure system optimizations in the past, but I got rid of most of them after powertop told me I should set my USB ports to autosuspend, which forced them to an eternal sleep, and ...
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1answer
3k views

Why does df show Available 0 when 1K-blocks minus Used is greater than 0? [duplicate]

Why does it show 0 in the available column? [root@server log]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda2 4128448 4096484 0 100% / It's an ...