The ext4 tag has no wiki summary.
9
votes
1answer
61 views
Is disabling barriers for ext4 safe on a laptop with battery?
The manual page says about the barrier option for ext4:
Write barriers enforce proper on-disk ordering of journal commits, making volatile disk write caches safe to use, at some performance ...
1
vote
1answer
17 views
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.
5
votes
0answers
78 views
How to configure a filesystem+LVM for effective usage of SSD?
ext4 is one of the filesystems recommended for using on SSDs (with a number of built-in techniques and advices how to tune it for better performance and wear-levelling of SSDs).
I want to install a ...
3
votes
1answer
64 views
Find which files are affected by bad blocks on ext4 filesystem
I have an ext4 filesystem that recently developed some bad sectors. Running fsck.ext4 -c finds and remembers the bad blocks. How can I find which files (if any) included these bad blocks so I can ...
6
votes
1answer
173 views
How are files laid out in ext2/ext3/ext4?
A few days ago all my metadata on a ext4 format flash card was overwritten.
I am now going to speculate on how this happened. This is pure speculation. It happened just after I used a different ...
2
votes
2answers
122 views
ext4 used space (not -m option, not deleted files)
I'm a bit puzzled about the way ext4 reports used space. On a new Debian wheezy (testing) installation, I consistently got about 1GB extra space used with a 60GB SSD, when compared to du. I then ...
1
vote
4answers
187 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 ...
5
votes
0answers
445 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 ...
3
votes
3answers
214 views
Will formatting my drive TRIM my SSD?
Will a standard fresh linux (Ubuntu 11.10 to be exact) install and drive re-format (full) successfully TRIM my SSD, or do I need to do something extra?
I know that ext4 will TRIM blocks on erase ...
2
votes
1answer
88 views
Which file system to choose for small sized files?
I have a partition and it has ~100 GB of audio files. Most of them are mp3 or ogg, each has size of ~15 MB. I update it on a weekly basis. Right now, the partition is formatted as ext4. I have read ...
5
votes
2answers
239 views
Why is (free_space + used_space) != total_size in df? [closed]
Possible Duplicate:
ext4: How to account for the filesystem space?
I have a ~2TB ext4 USB external disk which is about half full:
$ df
Filesystem 1K-blocks Used Available ...
6
votes
1answer
317 views
Significant difference in speed between fsck using ext3 and ext4 on Debian Squeeze
Recently I installed Debian Squeeze, first using ext3 and then again using ext4 on the same machine. The automatic fsck done after a certain number of mounts is much faster using ext4 (about 1 min) ...
5
votes
1answer
264 views
Fragmentation and ext4
Suppose I have a sparse file F on a Linux ext4 filesystem, and process P1 is writing to a disjoint 50% subset of F while P2 writes to the other 50% of F. I would like to minimize fragmentation while ...
3
votes
1answer
180 views
What does this Linux kernel trace mean?
I’m running a linux server at home which is mostly a file and e-mail server and a digital video recorder.
All the data goes on an ext4 partition on a software raid-6.
Every now and then (sometimes ...
3
votes
2answers
124 views
Allocate file at a specific offset in ext3/4
For benchmark and testing purposes I need to be able to allocate a file at a specific offset from the start of the partition. When I create a new file normally, its blocks are placed wherever the file ...
