2
votes
3answers
22 views

How can I modify the wtime of ext filesystem

How can I modify the superblock of an ext filesystem so that I can set the field wtime (Last write time)? I've tried with debugfs: debugfs 1.42.9 (4-Feb-2014) debugfs: open /dev/sdd2 -w debugfs: ...
3
votes
0answers
72 views

Cannot set ACL on ACL-enabled EXT4 partition

I am trying to enable xattrs and acls on a Debian machine. I've (re)mounted the partition in question with user_xattr and acl. (/dev/md3 is the partition in question) root@fs01:/# mount | grep ...
-1
votes
3answers
198 views

What happens if fsck.ext4 -y is run on a ext3 fs and how to I recover from it

I had a mountable fs (pretty sure it was ext3), fsck.ext4 was run with -y and ended in a segmentation fault. Now it is unmountable (dmesg says it's corrupt) and identifies as a ext4 fs via the "blkid" ...
-5
votes
2answers
432 views

How to convert lvm to ext3/4? [closed]

I have an old box(CentOS 5) that was formatted as lvm but now I want to convert it to ext3/4 file system without losing data. I have some empty disks that can be used, so is there an easy way to do ...
-1
votes
1answer
317 views

Impossible to read / delete some files

How can I fix a message like this (read after a dmesg command)? EXT4-fs error (device hdb1): ext4_lookup: deleted inode referenced: 119197 EXT4-fs error (device hdb1): ext4_free_inode: bit already ...
2
votes
1answer
252 views

ext4: Online resize not detected

On a RedHat 6 server, we ran into an issue with online resizing of an ext4 filesystem. With only /dev/sda we had 13GB available in the volume group, but needed 20GB more on one logical volume which ...
1
vote
2answers
171 views

ext3 converted to ext4 still being mounted as ext3

I have a somewhat bizzare problem at the moment with my Debian-system (mainly testing). I used to have a root-partition on lvm that was formatted as ext3. I now booted a live-system and converted ...
1
vote
0answers
164 views

deleting files only frees space partially (ext3 / ext4)

I just did something similar to this: $ du -sh /bigdata/stuff 1022G /bigdata/stuff $ df -h /bigdata Fileystem Size Used Avail Used% mounted on /dev/sda5 1,8T 1,7T 140G 93% /bigdata $ rm ...
1
vote
1answer
52 views

Moved data from an ext4 volume to an ext3 volume and it is consuming more space, why?

Just need a simple answer, did some searching and couldn't find it. What is the metadata overhead with ext3 as compared to ext4? I migrated a number of volumes from a SAN that was using ext4 volumes ...
3
votes
3answers
103 views

How do you *tag* a partition as ext4?

I have an ext3 partition so when I do this: mount /dev/blah /mnt/blah it is mounted automatically as ext3. I can get it to mount as ext4 by running mount -t ext4 /dev/blah /mnt/blah and it ...
3
votes
4answers
352 views

If I upgrade an ext3 fs to ext4, will it automatically increase the maximum amount of directories per directory?

Due to an external unavoidable situation*, I need to have more than 32k directories in a directory (but as far as I can tell, less than 64k). I'm hitting the limit of ext3. I presume the original ...
2
votes
1answer
182 views

SLES 11 recommended filesystem

We are upgrading some servers from SLES 10 to SLES 11 and I just saw that ext4 is not supported. Should I move to XFS or keep ext3? I will be moving the programs and databases to a new VM so ...
4
votes
1answer
563 views

rsync copies unmodified files between different file systems

I try to synchronize files between two machines using rsync, but it seems to copy all the files regardless file modification time. Two consecutive call of the command produces the same results, so it ...
1
vote
0answers
219 views

LVM failure recovery

We have an server PC with "intel matrix storage manager" raid (or maybe 'fake' raid) controller. Firstly there were one RAID-1 with two equal seagate disks of 1TB size. We've installed ubuntu server ...
0
votes
1answer
928 views

Solaris support for ext4/ext3/btrfs

Does anyone know if Solaris 11 (Sparc version) supports mounting ext3/ext4 or even better Btrfs volumes ? Most of the topics I find on the web are quite outdated (2006/2007) and reference old ...
1
vote
1answer
201 views

optimizing ext[234] for small file throughput

I have a system that has a high throughput of small files on disk, i.e. a huge number of small files are created, written and deleted within seconds. Are there any reasonable ext2/ext3/ext4 mount ...
2
votes
2answers
6k views

Does CentOS 5.x support ext4?

I believe the default OS file system in CentOS 5 is ext3. Is it possible to use ext4 on Centos 5.x, or only on 6.x? Can I upgrade an existing ext3 filesystem to ext4?
3
votes
3answers
1k views

Journaled filesystems and power failure

I heard that even a journaled filesystems such as EXT3/EXT4 might corrupted during power failure, e.g. from wikipedia [1]: In the event of a system crash or power failure, such file systems are ...
0
votes
3answers
604 views

How many subdirectories does the XFS filesystem support within a given directory?

EXT3 supports 32,000 subdirectories. EXT4 supports 64,000... I've read about people having millions of subdirectories on the XFS filesystem, but can't find an exact value referenced anywhere. How ...
10
votes
10answers
767 views

How does the number of subdirectories impact drive read / write performance on Linux?

I've got an EXT3 formatted drive on a Linux CentOS server. This is a web app data drive and contains a directory for every user account ( there are 25,000 users ). Each folder contains files that ...
0
votes
1answer
150 views

Problems with degraded RAID arrays

My Ubuntu backup server was recently upgraded in storage space to a RAID 10 array... now it consists of 8T of raw drive space which was before 2T of space. But I have been having trouble when it ...
1
vote
1answer
970 views

EXT3 vs EXT4 vs XFS

Recently I read a lot about "new" file systems. I checked some benchmarks that show MySQL working faster on EXT4 or XFS (and some other FS). I also "found" that XFS and EXT4 are included in CentOS ...
5
votes
3answers
2k views

Convert a software raid volume from ext3 to ext4 (or ext2)?

I have an mdadm created software raid volume in my ubuntu linux 11 machine. It is NOT the boot drive. It is a software raid 5 configuration made from 3 large sata drives. When I created it ...
0
votes
2answers
274 views

Convert Ext3 to Ext4 Filesystem failed because I cannot umount drive

I want to convert my Filesystem from Ext3 to Ext4 because of 32000 directory limit of Ext3. But when I want to umount the drive I get this error: umount: /: device is busy umount: /: device is busy ...
5
votes
1answer
224 views

upgrading ext3 fs on ubuntu 8.04

so we are stuck with this closed source system that keeps on adding folders to one directory, and it's going to hit the 32k limit soon because it's ext3. and that folder is expected to have +100k ...
1
vote
1answer
308 views

sharing an ext3/ext4 partition on external drive

is there a way of sharing an ext3/ext4 formatted partition on an external USB drive between different users (uids) on different Linux machines without creating a group for this purpose, setting the ...
3
votes
3answers
2k views

how do I convert a live root ext3 filesystem to ext4?

I have a root filesystem thats live and mounted and I'd like to convert it to ext4. All the howto's i've read deal with booting off a live CD but thats not an option.
1
vote
3answers
2k views

Convert an ext4 partition to ext3 without formatting the HDD

I would like to convert an ext4 partition to ext3 partition without formatting the HDD. Is this possible and recommended?
16
votes
2answers
7k views

Production-ready, highly reliable filesystems on Linux: ext4 ext3 XFS or JFS (or ZFS)?

The last real question I've seen on this topic is from about two years ago (is ext4 ready for production usage). In the intervening time, how has ext4 improved? XFS, JFS, and ext3 are the standby ...
23
votes
12answers
4k views

Storing and backing up 10 million files on Linux

I run a website where about 10 million files (book covers) are stored in 3 levels of subdirectories, ranging [0-f]: 0/0/0/ 0/0/1/ ... f/f/f/ This leads to around 2400 files per directory, which is ...
2
votes
1answer
900 views

25TiB for /home from 16TiB, what to do with ext3?

I have recently lvextend my logical volume (where /home is) from 16TiB to 25TiB. However, when I try to run extend2fs on my /dev/vtrak/home, it complains that resize2fs 1.41.12 (17-May-2010) ...
0
votes
2answers
504 views

Can't Mount Remote Share From RHEL 6

I'm trying to upgrade some Linux systems to RHEL 6, but I cannot mount the home directories. I'm using EXT4 for the RHEL 6 system and EXT3 on the RHEL 5 server, which I'm mounting the directory from. ...
2
votes
2answers
2k views

Questions for Ext3/4 Features ( dir_index,filetype) and XFS File system Performance

I am developing an applications which reads huge list of directories and check file types using file command and using ext4 file system. When i look into Ext4 , i see it have two interesting features ...
3
votes
3answers
790 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 ...
3
votes
2answers
1k views

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
2
votes
2answers
3k views

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
votes
7answers
1k views

Filesystem for an external drive that'll only connect to Linux

I just bought a new 500GB external harddrive. Most of the time I only store operating system ISO's on those things and some movies. Large files anyway, well over 4GiB sometimes, so FAT is out of the ...
11
votes
6answers
21k views

What are the differences between ext3, ext4 , ReiserFS?

And why should I pick one instead of the other?