ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.
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2answers
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Drawbacks of increasing number of inodes in EXT4
I am currently using backintime to take "snapshots" of my file system. It is similar to rsnapshot in that it, makes hard links to unchanged files. I have recently run out of inodes on my EXT4 ...
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2answers
13k views
How can I fsck a partition when the device reads as busy (but has been confirmed otherwise)?
I'm attempting to run fsck -p /dev/sda5 to repair errors on an ext4 partition, however the command outputs
fsck from util-linux-ng 2.17.2
fsck.ext4: Device or resource busy while trying to open ...
0
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1answer
22 views
Safest way to run ext4 fsck on external drive
I have an external drive formatted in ext4 that throws this error message when is plugged in EXT4-fs (sdd2): error count: 8 initial error at 1366215273 last error at 1366215527,it generally works just ...
2
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1answer
52 views
What does the command “chattr +c /some/dir/” do?
I'm trying to keep a bunch of plain text files compressed using the extended attribute option - c on a debian ppc64 system. I ran the following commands:
# mkfs.ext4 /dev/test/compressed
# mount ...
7
votes
1answer
160 views
How can I mount filesystems with > 4KB block sizes?
I have a 3TB hard disk pulled out of a WD Mybook Live NAS. The partition table is as follows:
Model: ATA WDC WD30EZRS-11J (scsi)
Disk /dev/sdb: 3001GB
Sector size (logical/physical): 512B/4096B
...
3
votes
3answers
69 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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0answers
81 views
Linux 3.5 ext4 slow hdd performance?
This is a bit of a general question.
I have just installed Mint Linux 14.1, root is ext4 and rest are NTFS (dual boot).
I'm using a laptop, and I have always suffered from that annoying hdd ...
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2answers
50 views
Encrypted disk filesystem compatibilities
On my Debian Linux system during the install I decided to use disk encryption (the one offered during a regulard Debian install). When the system boots up I need to enter a password and then the ...
13
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2answers
311 views
Can the same ext4 disk be mounted from two hosts, one readonly?
I know that mounting the same disk with an ext4 filesystem from two different servers (it's an iSCSI vloume) will likely corrupt data on the disk. My question is will it make any difference if one of ...
1
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0answers
55 views
How can I delete data from in a hexdump file from one offset to another?
I've created a disk image which was zeroed, formatted to ext4 file system, and then had several various files copied to it.
I'm trying to extract these files using a combination of xxd and dd, but ...
2
votes
6answers
11k views
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 ...
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2answers
886 views
Should a laptop user switch from ext4 to btrfs?
Related to this.
I'd like to take advantage of an OS switch to upgrade to BTRFS.
BTRFS claims to offer a lot (data-loss resiliency, self-healing if RAID, checksumming of metadata and data, ...
4
votes
1answer
143 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 ...
4
votes
2answers
351 views
Recovering an ext4 filesystem with corrupt journal
I have a hard drive that seems to have developed some kind of hardware problem in the journal. This prevents the drive from being loaded. Running mount -r -t ext4 /dev/sda5 /mnt/root results in the ...
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2answers
2k views
Arch Linux fails to boot from a USB key (cannot mount selected partition)
I tried to install Arch Linux to an USB key. Things are kind of wobbly (it assumes the system has exactly one drive inside, for example) but everything installed just fine. Until I rebooted.
...
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0answers
62 views
Missing operating system
Extlinux keeps saying Missing Operating System and I don't know what to do. I tried installing the Master Boot Record but it says Missing Operating System too. I have extlinux installed on my sd card.
...
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0answers
72 views
How to put syslinux on an sd card
I would like to know how to put syslinux on my sd card and I have tried using extlinux. However, I keep getting the message Missing Operating System. Please help me.
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1answer
71 views
How to write isolinux to an ext4 filesystem
How would I write isolinux to an ext4 filesystem on an 1 GB SD card so that it would boot at startup?
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6answers
2k views
How do I know if a partition is ext2, ext3, or ext4?
I just formatted stuff. One disk I format as ext2. The other I want to format as ext4. I want to test how they perform.
Now, how do I know the kind of file system in a partition?
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4answers
12k views
Recovering ext4 superblocks
Recently, my external hard drive enclosure failed (the hard drive itself powers up in another enclosure). However, as a result, it appears its EXT4 file system is corrupt.
The drive has a single ...
1
vote
1answer
76 views
Constant reading using ext4
I had a disk with a full size NTFS partition. I just deleted it and created an EXT4 one.
When it was NTFS, if it wasn't in use (mount but no in use) it was quiet. However now, using EXT4, it is ...
2
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0answers
163 views
extundelete does not finish its work
I need to restore a file on sda7 so I remounted ro und startet extundelete
manuel@P5KC:~/recovery/RECOVERED_FILES$ sudo extundelete --restore-all /dev/sda7
WARNING: Extended attributes are not ...
4
votes
1answer
164 views
Why could the size of the “dot file” /. exceed 4096?
Today I found an "empty" directory with a size of 4MB.
It had no visible contents, so I tried ls -lah. This showed me some hidden files (not very large). Searching for the reason why the directory ...
2
votes
1answer
113 views
Why is some filesystem space used even though the filesystem is empty? [duplicate]
Possible Duplicate:
ext4: How to account for the filesystem space?
After googleing a little I find that ext4 reserve 5% for root: Reserved space for root on a filesystem - why?, ext2/3/4 ...
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votes
2answers
6k views
Why ext4 File System is better than NTFS?
For a presentation, I need to show ext4 File System is better than NTFS. I searched and got nice article on both ext4 and NTFS
http://en.wikipedia.org/wiki/Ext4
http://en.wikipedia.org/wiki/NTFS
...
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votes
1answer
214 views
Extended partition should have many filesystems
I need some related information on the following lines I found in an answer:
A logical partition is a container for a filesystem (or an LVM volume or some swap space or a BSD partition or other ...
2
votes
1answer
152 views
How do I choose between ext 3 and 4?
I tried looking at the difference, the main ones seem to be 4 supports more subdirectories in a file, supports larger files, has delayed write which I don't prefer as I don't want data loss. I also ...
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1answer
967 views
Resize non-LVM ext4 root partition
How can I shrink/resize a non-LVM ext4 root partition?
The problem is I can't unmount it and I don't have physical access.
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votes
3answers
448 views
Why does dd change the filesystem on the external disk?
I took out a 250 GB SATA disk from my netbook, filled it with zeroes with dd and connected it to my laptop via the usb adapter. It's correctly detected by fdisk:
Disk /dev/sdb: 250.1 GB, 250059350016 ...
4
votes
1answer
179 views
What are EXT4 Security Labels?
During Gentoo installation of Gnome keyring, I am told to switch on EXT4 Security Labels, which is described in the kernel documentation by:
Security labels support alternative access control ...
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vote
1answer
78 views
What is a generic way of finding out whether the kernel has ext4 (or other) bugs?
From /. found this worrisome post by Theodore Ts'o. Turns out ext4 has some journalling problems. How can I quickly find out version numbers of susceptible kernels for this and other bugs?
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1answer
256 views
how to restore a logical partition to it's original ext4 format
This question is following Unable to mount /home/ partition after reinstalling grub after reinstalling windows 7 where the diagnostic was that installing windows 7 deleted my /home partion, lovingly ...
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votes
2answers
228 views
Fastest way to get list of all file sizes
I'm trying to create a graph of the distribution of file sizes on my ext4 system. I'm trying to write a script to scrape this information from my computer somehow. I don't care where the files are ...
2
votes
1answer
621 views
Unable to mount /home/ partition after reinstalling grub after reinstalling windows 7
I've reinstall windows 7 on it's asignated partition and, as usually, it override the MBR with it's own stuff and, thus, it was not possible to boot to my ubuntu 12.04 partition.
I followed the step ...
5
votes
1answer
813 views
Birth is empty on ext4
I was just reading up on the Birth section of stat and it appears ext4 should support it, but even a file I just created leaves it empty.
~ % touch test ...
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3answers
302 views
A lot of errors on ext4, however smart doesn't show any errors
I have a Debian box with additional ( it is not a system disk ) 1.5Tb sata hdd (wd caviar green). There is only one partition on the whole disk.
Disk is used for backups from remote system (with ...
5
votes
1answer
2k views
Is there any difference between e2fsck and e4fsck on CentOS / RHEL systems?
ext4.wiki.kernel.org makes it sound like e2fsck was simply renamed to e4fsck so that e4fsprogs and e2fsprogs could coexist without overlapping. However, there is no mention of any difference in the ...
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votes
1answer
1k views
recovering ext4 partition after dd'ing over start of HD
I accidentally used dd and wrote over the first 208MB of my external disk. What I wrote over is a partition on its own (Debian nestinstaller) so what I see now is not my old (now damaged) ext4 ...
2
votes
1answer
186 views
How to fix a fragmented ext disk - myth or truth?
I just read this article about the virtually non-existent disk fragmentation on *nix filesystems.
It was mentioned that due to the way ext handles writing data to the disks, fragmentation may only ...
2
votes
1answer
71 views
To use -c0 -io in file-systems with journal
I've several partitions with EXT4.
Now, I would want if it makes sense to use tune2fs with flags -c0 (max-mount-counts) and -i0 (interval-between-checks) in the partitions with a journal file-system ...
2
votes
3answers
1k views
Can't mount EXT4 hard drive after mounting it in windows
I have a 2TB Western external HDD.
Its original filesystem was NTFS but I formatted it to EXT4.
I had no problem in Linux; But today after I mounted it using ext2fsd in a windows box, I cant mount it ...
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0answers
482 views
Superblock corruption on every boot
I have a Linux Mint 12 install on my laptop. Yesterday I powered it off like I always do and this morning when I started it I was greeted by an error screen.
(Translated from Swedish)
Fatal ...
3
votes
1answer
175 views
corrupted library after hard shutdown
yesterday night my laptop executes a hard shutdown because my battery was out of charge. After the reboot Xorg hangs and the troubleshooting was pretty hard. A first file system check of my ext4 ...
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vote
0answers
168 views
Howto configure autofs to work with usbsticks formatted with differend filesystems
I have some USB-sticks using fat32 as filesystem and others using ext4. Now I want to configure autofs to mount the sticks automatically.
To make sure that the user can write to fat32 sticks I use ...
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votes
0answers
31 views
Recreating EXT4 partition without losing data [duplicate]
Possible Duplicate:
Can't mount EXT4 hard drive after mounting it in windows
I have a 2TB Western External USB harddisk.
I formatted it to EXT4.
one time I plugged it to a windows ...
3
votes
0answers
203 views
No access to symlink folder on NTFS partition
I am using an NTFS parition for storing data I like to access both from Ubuntu and Windows 7. On my Ubuntu HOME partition, I like to link the folder Assets in order to access it from an application ...
9
votes
2answers
1k views
Is it possible to change Inode count on an ext4 filesystem? [duplicate]
Possible Duplicate:
How can I increase the number of inodes in an ext4 filesystem?
I have a homemade NAS with Debian Wheezy 64bit. It has three disks - 2x2TB and 1.5TB, pooled together ...
2
votes
1answer
619 views
Why my partitions don't show the right capacity on a 4096 byte physical block hard drive?
After reading a lot about why newer 4096 byte physical block hard drives should be partitioned taking care of alignment (Linux on 4KB-sector disks: Practical advice, What is partition alignment and ...
0
votes
1answer
1k views
File system jfs/btrfs/xfs/ext4
I was looking into some of the requirement, where huge amount of recursive files are written and deleted and looking forward if any FS (file system) as such gives advantage on others.
I am trying to ...
4
votes
1answer
104 views
ext4 directory lists as a file
I'm working with a large (8TB) EXT4 filesystem in linux. After a power outage, the filesystem wouldn't mount. fsck is taking weeks to complete, but i ran testdisk and i'm able to see my partition ...
