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

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

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 ...
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1answer
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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 ...
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Debian stucks at formatting 33%

I'm trying to install Debian Squeeze 6.0.5 on a new HP Proliant Microserver N40L with 4 GB RAM and 1.5 GHZ and 2 new Seagate BARRACUDA 2TB HDD (delivered yesterday). The installation stuck at the ...
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1answer
217 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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14 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 ...
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3answers
4k views

What mount option to use for ext3 file system to minimise data loss or corruption?

I have an embedded setup using an initramfs for the root file system but using a custom ext3 partition mounted on a compact flash IDE drive. Because data integrity in the face of power loss is the ...
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2answers
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ext3 root filesystems goes read-only with aborted journal even after repairs

Short version: ext3 root filesystem on rackspace (xen) VM detects aborted journal on boot and mounts read-only. I've attempted to repair this from a rescue environment with tune2fs and e2fsck as ...
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2answers
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“Converting” a filesystem from ext3 to ext4

I've read on some Q&A on this website that one can "convert" an ext3 filesystem to ext4 without formatting, by issuing tune2fs -O extents,uninit_bg,dir_index /dev/dev-name And then running ...
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1answer
418 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 ...
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7answers
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Tell fs to free space from deleted files NOW

Is there a way to tell the kernel to give back the free disk space now? Like a write to something in /proc/ ? Using Ubuntu 11.10 with ext4. This is probably an old and very repeated theme. After ...
0
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1answer
109 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 ...
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Mounting Ext3 in linux different user

I am trying to mount an ext3 based memory stick in Linux based development board. I used mount with -u and -g for mounting the fat based memory stick with different user. When I tried the same ...
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2answers
5k views

largefile feature at creating file-system

Is useful to use -T largefile flag at creating a file-system for a partition with big files like video, and audio in flac format? I tested the same partition with that flag and without it, and using ...
8
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5answers
584 views

How to search for files with immutable attribute set?

For config auditing reasons, I want to be able to search my ext3 filesystem for files which have the immutable attribute set (via chattr +i). I can't find any options for find or similar that do ...
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1answer
181 views

debug mkfs.ext3 command output

I was creating a new file system in my external HDD. While formatting, I had to format this partition to the remaining available partition which is somewhere around 850GB. Now, I created an ext3 file ...
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3answers
602 views

Is maximum individual file size in ext3 imposed on mysql tables?

I am reading about the file systems in Linux from here. This particular sentence kind of confuses me. For ext3, Maximum individual file size can be from 16 GB to 2 TB. Overall ext3 file ...
4
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1answer
107 views

What is the difference between fsck options -y and -p?

The ext2/3/4 filesystem checker has two options that seem to be very similar, -p and -y. Both seem to perform an automatic repair, but the manpage states that -p can exit when it encounters certain ...
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1answer
40 views

Can an entire ext3 filesystem be corrupted if the system loses power?

I understand that any files being written to during power loss can get corrupted, but is it possible for an entire ext3 filesystem to become corrupted during a power loss event? If so, how? Thanks!
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Mount EXT3 with 16KB blocks

I have a failing Sparc based Netgear ReadyNAS that uses LVM on Raid with EXT3 partitions with a 16KB block size. I would like to pull the drives out of the NAS and mount them read only in a Linux box. ...
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3answers
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EXT3: If block size is 4K, why does ls -l show file sizes below that?

If you run ls -l on a file that contains one letter, it will list as 2B in size. If your file system is in 4k blocks, I thought it rounded files up to the block size? Is it because ls -l actually ...
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3answers
45 views

Verify semantic integrity of filesystem

I just started up my linux box to find that one of my filesystem's had errors: I had to login as root to run fsck and hit y repeatedly. There were a lot of errors. So many that I used silly putty and ...
4
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2answers
295 views

Reliable way to detect ext2 or ext3 or ext4?

I need to detect a filesystem type from a C/C++ program using the filesystem superblock. However, I don't see much differences between superblocks for ext2 and ext4. The s_rev_level field is the same ...
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2answers
567 views

ext3 Filesystem shows full to most apps, but only 77% full to DF

Var is showing as full to many apps like Nagios, Puppet, and the LVM tools (pvs, vgs, etc) df -h output 6.0G 4.3G 1.4G 77% /var vgs output /var/lock/lvm/V_rootvg:aux: open failed: No space ...
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1answer
75 views

Why is it impossible to change the inode count of an ext filesystem?

I know that it isn't possible to change the inode count of an ext filesystem after its creation, but I haven't been able to find any explanation on why it isn't. Can anyone enlighten me?
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1answer
66 views

mke2fs difference between -i and -I options

sudo mke2fs Usage: mke2fs [-c|-l filename] [-b block-size] [-C cluster-size] [-i bytes-per-inode] [-I inode-size] [-J journal-options] [-G flex-group-size] [-N number-of-inodes] [-m ...
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fdisk -l shows ext3 file system as HPFS/NTFS

I have an external HDD which I formatted as NTFS partition in Windows. Now, I formatted this HDD in my linux system using the below command. mkfs.ext3 /dev/sdb1 It was formatted successfully. ...
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2answers
31 views

Tool to create a bad physical location report on disk

I am in need of a tool that would run on an Ubuntu system that would be able to report the following: Bad physical locations on a disk (cylinders, sectors) Files that are affected by these bad ...
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1answer
295 views

md raid1 ext3 and 4k sectors slow with directory operations

I recently moved from a hardware RAID1 enclosure to using two eSATA drives with md. Everything seems to be working fine, except for the fact that directory traversals/listings sometimes crawl (on the ...
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linux io stack analysis

I'm trying to understand the Linux IO stack by analyzing blktrace trace. Below is the trace i captured by executing simple fio sequential write with no Direct IO (5 x 8k request size). 8,16 1 ...
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2answers
932 views

How to clean journals in ext3/ext4 filesystem? [closed]

Some preamble: I'm taking bitwise copy of disk devices (via dd command) from twin hosts (i.e. with the same virtualized hardware layout and software packages, but with different history of usage). To ...
5
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1answer
302 views

zerofree verbose returns what?

zerofree -v /dev/sda1 returned 123642/1860888/3327744. The man page does not explain what those numbers are: http://manpages.ubuntu.com/manpages/natty/man8/zerofree.8.html I found some code on ...
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1answer
548 views

How can I dump the contents of a filesystem's superblock?

I understand that I can list the location of a filesystem's superblocks using the following commands. Example First get the device handle for the current directory. $ df -h . Filesystem ...
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1answer
180 views

Is there a problem using resize2fs too often?

I have a partition which contains MySQL data which is constantly growing. My LVM PV has precious little free space remaining and therefore I find I'm frequently adding additional space to my /var ...
3
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1answer
66 views

Automatically set file attributes in a given directory

Let's say I want to set one or more attributes (in the chattr sense) on every file created in a given directory. Is there a way to achieve this automatically, like umask does for file permissions ? ...
2
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3answers
650 views

Safe to disable boot fsck on read-only ext3 file system?

I have a large, frequently read, ext3 file system mounted read-only on a system that is generally always hard power cycled about 2-3 times per day. Because the device is usually powered off by ...
2
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1answer
138 views

Minimizing “idle” writes on a file system

Leaving out many details, I need to create a read/write file system on a device with the following main goals: Eliminate all writes while data is not being explicitly written. Reduce all indirect ...
2
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1answer
345 views

How can I restore my linux?

I had an hard-drive with two partitions: one was 460GB NTFS and the other was 5GB ext3 Ubuntu 10.10. I wanted to extend the Ubuntu partition, so I was going to shrink the NTFS partition by 15GB, but I ...
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1answer
188 views

What would happen if we mounted a file system that e2fsck is already running on?

It is generally a bad idea to e2fsck a file system while the file system is mounted (the man page mentions one specific situation where it is safe: -n given, and -c, -l or -L not given, and even then ...
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is it safe to backup ext4 partition with partimage , which is detected as a ext3 partition

I use partimage to backup my ext4 partition, but during backup, the partition was detected as an ext3 partition. So I'm wondering if this can cause something bad.
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174 views

What caused this ext3 filesystem / mounting problem?

((K)Ubuntu 12.04, kernel 3.2.0-38-generic, fstype ext3) I recently came across the 'great idea' of using hibernation to save state in my main OS, while I boot another OS. I've done this without ...
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3answers
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Unable to mount ext2 hard drive

I have been trying to mount an ext2 hard drive in ubuntu server, but when i run sudo mount /dev/sdb /media/mynewdrive -t ext2 I get wrong fs type, bad option, bad superblock on /dev/sdb1, missing ...
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357 views

Testing ext3 filesystem on embedded device [closed]

My set up: An embedded device with flash memory on it. Flash is partitioned into ext3 filesystem partitions. Have busybox on it. My Goal: To uncover errors /bugs/ problems on ext3 filesystems. ...
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1answer
209 views

Cannot make anyfs-tools. My e2fslibs package seems not to be the compatible version

anyfs-tools promises to convert a ntfs partition into ext3. That's what I want to do. (I have backed up what was necessary). But when I try to compile anyfs-tools I get a make compilation error ...
3
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3answers
331 views

Convert old /home from ext3 to ext4

I have an old /home partition, that dates back to former linux systems, and it is still in ext3 format. Whereas the rest of my system, / and some other mounted point are devices formated in ext4. I ...
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2answers
203 views

decreasing “reserved block count” does not show up in df output

By default my ext3 file system had 122060 blocks(5%) reserved. I decreased this to 24412(1%), but there were no changes in df output: root@t60:~# df -P Filesystem 1024-blocks Used ...
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319 views

Confusion with how to restore corrupt ext3 files if power outage occurs during a file write

I am running a small embedded system. Because the system will never be gracefully shutdown and will just have the power cable unplugged, I am running an initramfs but mounting an ext3 partition on a ...
6
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1answer
1k views

Is it possible to disable file permissions on a ext3 or ext4 file-system?

Is it possible to disable file permissions on an ext3/4 file-system? Just wondering if it's possible to completely disable or ignore file permissions on a ext3 or ext4 file system. Perhaps a mounting ...
5
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3answers
115 views

What makes ext3 determine how frequently to perform file system checks when no options are specified?

I created two partitions on a 1.5 TB drive, the first was 1 TB, the latter was the remaining .5 TB. Both were formatted as ext3. I don't mind the automatic filesystem checks occurring every so often, ...
3
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1answer
103 views

md5sum change after mount?

I have a ext3 filesystem on a .img file. After mounting and unmounting it, I noticed that the md5sum is changed, even if no file inside was changed! md5sum myfilesystem.img XXXX myfilesystem.img ...
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31 views

Recover files from ext3 formatted external hard drive [duplicate]

Possible Duplicate: Recovering deleted files on fedora I have an external hard drive that I had been using to store some photographs, but I accidentally installed Lubuntu on it. I'd like to ...