ext3 is the default file system for many Linux distributions.

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Do large folder sizes slow down IO performance?

We have a Linux server process that writes a few thousand files to a directory, deletes the files, and then writes a few thousand more files to the same directory without deleting the directory. What ...
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2answers
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how can i move ext3 partition to the beginning of drive without losing data?

I have a 500GB external drive. It had two partitions, each around 250GB. I removed the first partition. I'd like to move the 2nd to the left, so it consumes 100% of the drive. How can this be ...
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3answers
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Surprising corruption and never-ending fsck after resizing a filesystem

System in question has Debian Lenny installed, running a 2.6.27.38 kernel. System has 16Gb memory, and 8x1Tb drives running behind a 3Ware RAID card. The storage is managed via LVM, and is ...
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3answers
792 views

Disabling “symlink follow” feature on Ext3/4 mount points

How can I disable the symlink feature of ext3 file system mount point ? My server is being attacked by some sort of symbolic link hacking methods for reading other user's home directory. There is such ...
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2answers
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Can I use ext3 as a shared fs if I add a lock manager?

I need a cluster filesystem for an iSCSI device. The problem is that the servers to which it is connected generate datafiles which must be read by every other servers. Except for the writing and ...
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9answers
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Maximum number of files in one ext3 directory while still getting acceptable performance?

I have an application writing to an ext3 directory which over time has grown to roughly three million files. Needless to say, reading the file listing of this directory is unbearably slow. I don't ...
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1answer
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filesystem mounting problem

A DAS box is attached to my linux box using LSI SCSI HBA. Volume is properly detected on the linux box and filesystem is created using mkfs.ext3 /dev/sdc #No partition table I can not mount ...
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11answers
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How to make `rm` faster on ext3/linux?

I have ext3 filesystem mounted with default options. On it I have some ~ 100GB files. Removal of any of such files takes long time (8 minutes) and causes a lot of io traffic, which increases load on ...
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3answers
888 views

Immutable hard links on ext3/4?

In my research on file versioning at the fs level, snapshotting, and related ideas, I took a look at hard-links and exactly what they are and how they behave. Using rsync you can get a pretty slick ...
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6answers
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How do I get transparent, efficient, file system snapshotting or versioning on ext3/4?

I've long thought about versioning file systems. This is a killer feature and I've looked at Wayback, ext3cow, zfs, fuse solutions, or just cvs/svn/git overlays. I consider ext3cow the model for my ...
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7answers
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How do you re-mount an ext3 fs readwrite after it gets mounted readonly from a disk error?

Its a relatively common problem when something goes wrong in a SAN for ext3 to detect the disk write errors and remount the filesystem read-only. Thats all well and good, only when the SAN is fixed ...
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4answers
566 views

Log file is missing, how can I see that and what happened to it

A process identified by process id 2147 is running, but its logfile is nowhere to be found. The filesystem is ext3 and 100MB of space remains. nothing went wrong in process 2147. An lsof of process ...
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2answers
610 views

Pass Column of fstab

If I have the 6th column in fstab (the pass column) set to 0, does that mean checks will never be forced at boot regardless of anything like File System State, Mount Count, and Check Interval on the ...
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4answers
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How do you get e2fsck to show progress information?

I'm running e2fsk on a very large (1TB+) ext3 disk with e2fsck -v /dev/sda1 from RIPLinux booted with PXE. I get e2fsck 1.41.6 (30-May-2009) /dev/sda1 contains a file system with errors, check ...
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2answers
918 views

Trying to grok Linux quotas, where is the data stored?

So all the tutorials and documentation for the Linux quota system has left me confused. For each filesystem with quotas enabled/on where is the actual quota information stored? Is it filesystem ...
8
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1answer
3k views

Best practices for choosing fs block size on ext3/4?

I never really pay block size much attention but obviously there can be benefits to choosing something other than the default. I am looking for a good "best practices" paper on choosing block size. ...
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2answers
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What are the merits of ext3 over ext4?

Specifically want to use the storage for music/video files but with a smattering of usual doc/xls/etc) - wondering if there is a concrete reason to go for one over the other. Thanks
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3answers
317 views

ext3 slowing down on writes on linux 2.6.18

i'm running into a problem where writing to a file will cause a 5 to 15 second pause, this occurs only on writes. So far i have remounted the filesystem with data=writeback as an option, and set /sys/...
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2answers
2k views

Debian - resize root ext3 partition on remote system

Hello I want to resize (shrink) root ext3 fs partition of remote Debian 5.0 system. There is no LVM. Is it possible without using a livecd? E.g. via custom initrd.img. And second problem - Can I ...
3
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1answer
203 views

Accidentally overwrote first 400MB of hard drive with ext3 partition - possible to rescue?

Accidentally wrote /dev/zero to the first 371MB of a 500GB disk. Is it possible to rebuild the partition table and/or recover what data hasn't been overwritten?
2
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1answer
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maildir in Windows for IMAP

I'm interested in accessing my IMAP accounts offline. I found that maildirs are a simple way to make it work. I found that [offlineimap] takes care of almost everything in making the IMAP->maildir ...
4
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1answer
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Folder size is greater than 4K on ext3

Lets say we have a default formatted ext3 filesystem, I run under the assumption that folders take 4K of space on the disk. But, what does it mean when a folder is bigger than 4K? Here is a pic of ...
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2answers
182 views

EXT3: What disk checks should be run after a hard reboot or power failure?

In the event that a hard reboot is performed or a system loses power without a proper shutdown, what checks should be run to verify file-system/data integrity on ext3 partitions? I've heard of fsck, ...
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2answers
978 views

How can I minimise the size of an ext3 partition (and its LVM logical volume)?

I am using LVM on Ubuntu 9.10 (Karmic). I have a single LVM physical volume (and a single volume group). I have an ext3 filesystem inside an LVM logical volume which I no longer use, but for the time ...
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2answers
875 views

how to mount an ext3 filesystem with a smaller blocksize then device blocksize?

I had an ext3 filesystem on my hard disk at /dev/hdc2 with a small 1024 byte blocksize. Now I recorded the whole filesystem on a DVD like this: dd if=/dev/hdc2 of=/tmp/image.img wodim -dev=/dev/scd0 /...
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1answer
509 views

Creating a filesystem bigger than 8 TB in RHEL 4

I'm trying to create a couple of 10 TB filesystems on a RHEL 4.8 file server. ext3 theoretically supports up to 16 TB, but I know there are some gotchas above 8 TB. All the docs I've seen suggest that ...
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1answer
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Debian Lenny - SAN - LVM Fail

I've got a Lenny server that has got a SAN connection configured as the only PV for a VG named 'datavg'. Yesterday, I've updated the box with Debian patches and gave it a reboot. After the reboot, ...
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2answers
151 views

Data Recovery from external drive that used to be ext3 but then was formatted

Someone brought me an external hard drive that used to have ext3 partitions. He said that he was trying to install fedora core 10 on his machine, and left the external drive with his backups plugged ...
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3answers
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How to fsck.ext3 a TrueCrypt Volume?

I have a truecrypt file that contains an ext3 file system. Not sure exactly how to word this, but is there a way I can mount the truecrypt volume without actually mounting the filesystem within it so ...
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1answer
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Filesystem has unsupported features: older fsck.ext3 vs newer mkfs.ext3

For an embedded system I create a filesystem with mkfs.ext3 on a desktop computer. Currently I'm evaluating newer distros for the desktop while the embedded stays the same. When checking the filsystem ...
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2answers
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How to tell the language encoding of a filename on Linux?

I have a directory with ~10,000 image files from an external source. Many of the filenames contain spaces and punctuation marks that are not DB friendly or Web friendly. I also want to append a SKU ...
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2answers
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Mount an ext3 partition with a 16k blocksize?

We are attempting to recover data from a drive which was formated by Netgear ReadyNas Duo. We have dropped it in a linux box and discovered that it is formated as ext3 with a 16k block size. Mounting ...
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3answers
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ext3 format options

I'm creating a ext3 filesystem on top of a software raid5 (md) and I'm wondering what are the best parameters when creating the filesystem (with mkfs.ext3) and while mounting. RAID5 chunk size is ...
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2answers
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Change EXT3 stride and stripe-width settings post-install on CentOS 5.3

Is there a way to change the stride and stripe-width options on an ext3 file system under CentOS/RHEL 5.3? There's no way to specify it via anaconda during installation that I saw, and while I see ...
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2answers
142 views

/var a file and not a folder

On a CentOS 5.3 server the /var folder has changed to a file. Appears to be FS corruption. Rest of the FS looks OK. Anyone know a quick way to fix this? fsck.ext3 reports the fs as clean even using a ...
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2answers
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Why should I switch to ext4 when upgrading to Ubuntu 9.10?

I'm going to upgrade from Ubuntu 9.04 to Ubuntu 9.10 in a near future and wanted to know if I should migrate my existing ext3 partitions to ext4 during the process and, if yes, why?
2
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1answer
418 views

Xen virtual host is probably FSCKing - how do I verify?

I have a Xen virtual machine that has been running for over a year under a decent load. I restarted it this morning, and it's been several hours booting. I think it's FSCKing itself. xm list shows ...
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2answers
805 views

VMWare with physical partions in a dynamic disk?

Background: Host OS is Windows Vista. Guest OS is Ubuntu VMWare can give direct access to a guest OS to a physical disk partition, so say my disk has two partitions, the first is NTFS and has windows ...
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1answer
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Format ext3 disk space from Windows 7

Is it possible to format an ext3 disk space (on an extended partition) from Windows 7? Any utility available to do that? cheers
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4answers
660 views

Why is reiserfs marginalized?

I've seen lots of comments suggesting that EXT3 is safer & better than reiserfs. I've been using this FS for about 4 years now and never ever had problems. Before this I used ext2 and then ext3. ...
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2answers
477 views

ext3 file system failures after RAM upgrade

I have just added 2GB of RAM into my laptop and started getting problems with ext3 file system. I have tested the actual memory modules with MemTest86+, and they were fine. This issue also happens ...
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2answers
199 views

Mount shows as swap instead of ext3

Easy all, I have a hard drive with 4 partitions setup. boot/swap/root/home I recently installed windows onto the / partition as i needed it, and now that i'm switching back to linux it's showing /...
3
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1answer
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dirtied inode

I am investigating a very strange io issue. I have vm.block_dump enabled and I am seeing allot of messages in this form: process(29177): dirtied inode 42254471 (filename) on 0:14 What does dirtied ...
2
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1answer
560 views

how to tell if a directory on ext3 is indexed already?

It's often recommended to enable dir_index option on ext3 filesystems e.g. with sudo tune2fs -O dir_index /dev/dm-1 However, existing directories on that filesystem are not converted to indexed ...
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6answers
490 views

Linux Filesystem

recently we have a failure in our storage, we need to fsck. The storage is about 1.2 Tera, and it took us more than 5 hours. Is there an alternative solution for the ext3 filesystem, or one that is ...
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1answer
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Optimal Directory Depth vs Number of Files in a Directory for ext3?

To access files on ext3, and (if dir_index is not being used) what is the optimal directory depth vs the number of files per directory? Does file size effect this? The total number of files might be ...
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2answers
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How do I mount ext2 or ext3 filesystems on OSX?

I would like to mount an ext2/3 filesystem on a mac running 10.5.
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3answers
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Can I mount an ext3 filesystem on linux so files on the mount are owned by a userid?

I'd like to mount an ext3 filesystem via /etc/fstab so that the files in the mount are owned by a particular user. Is this possible ? I've looked at man mount but couldn't find an option to do this. (...
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3answers
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How do I restore a partimage image to a smaller drive?

Without thinking, I made a partimage image of a ~1TB ext3 partition, which only actually contained about 2GB of data, so gzipped down to that size. I then wiped it and used it for something else. I'd ...
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3answers
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NFS write performance

We have three VMware ESXi 4 hosts serving VM's from an OpenFiler NFS share. Every host has a direct gigabit connection to the NAS. Although read performance has been great, writing files inside the VM ...