Tagged Questions
0
votes
1answer
15 views
How does the number of files in the same folder affect I/O performance in an ext4 filesystem
I'm using Kyoto Cabinet (a key-value store) for my project. The specific type of DB I'm using is DirDB which creates a lot of files in a directory to store the key-value pairs. The server I'm running ...
1
vote
2answers
321 views
How do I read the Ext4 partition of my SD card on Windows? [duplicate]
I have a 32 GB SD card with one FAT32 partition and one Ext4 partition. If I mount the SD card to the computer I can read the FAT32 partition in Windows just fine. But how do I read the Ext4 ...
1
vote
2answers
49 views
I have an ext3 iso disk image. Can I use it and write it to a ext4 partition?
Is it possible to do so ?
I am migrating to EXT4 because of the SSD drive that has TRIM funtion. I have to have ext4 partion.
2
votes
1answer
142 views
ext4 integration in windows 8 - access through explorer
I know there are similar questions; however none I could find that addressed accessing ext4 through explorer, most others simply use a third party application.
However, my question is; is there a way ...
1
vote
2answers
122 views
Do ext4 filesystems need to be defragmented?
Do ext4 filesystems need to be defragmented? If so, how do I defragment them?
If not, could you post a simple explanation of why they do not need to be defragmented?
1
vote
1answer
1k views
Disable journaling on ext4 filesystem partition
I'm running Linux Mint on an SSD. I've read how one optimization is to disable journaling. However, when I run the command:
sudo mke2fs -t ext4 -O ^has_journal /dev/sda1
I get an error saying that ...
0
votes
2answers
157 views
Why doesn't Ext4 cache directory size?
Once again I'm cleaning up my desktop because I'm running out of HDD space and everytime I call 'du -sh ~', it takes a really long time to calculate the current size of the directory. From my ...
2
votes
1answer
687 views
What is EXT4-fs error (device md0): ext4_mb_generate_buddy:739: group 10770, 0 clusters in bitmap, 32768?
On my Ubuntu Server 12.04 I got this errors (via dmesg):
[ 1104.544121] EXT4-fs error (device md0): ext4_mb_generate_buddy:739: group 10771, 0 clusters in bitmap, 32768 in gd
[ 1104.549227] EXT4-fs ...
2
votes
1answer
120 views
Is file creation durable on ext4?
On some filesystems, when creating a file, it is necessary to call fsync() not only on the file itself, but also on the parent directory, to make the file creation durable. Otherwise, the directory ...
0
votes
2answers
1k views
How long can file system writes be cached with ext4?
A while ago, there has been some discussion about ext4 potentially leaving empty files after an unclean unmount, summed up pretty well in this article. Basically, because of delayed allocation, writes ...
0
votes
1answer
187 views
zram trimming by writing zero pages
I'm using ZRAM as a backing block device for /tmp filesystem in the following manner:
echo 8000000000 > /sys/block/zram0/disksize
mkfs.ext4 -O ...
1
vote
1answer
148 views
EXT4-fs error (device loop0) ext4_mb_generate_buddy
I've been randomly getting theses in my /var/log/messages
[5747511.945300] EXT4-fs error (device loop0): ext4_mb_generate_buddy: EXT4-fs: group 1: 29505 blocks in bitmap, 29455 in gd
Not had any ...
0
votes
1answer
47 views
Quick way to empty a partition
I have a partition, formatted ext4, that I want to empty completely. I will be repeating this write-then-empty process repeatedly, so I want the emptying step to be as quick as possible.
One option ...
1
vote
1answer
168 views
Is there a tool to browse files on a VMware virtual disk w/o starting a virtual machine?
I am looking for a way to browse through a VMware virtual disk in order to extract/copy files that are located on an Ubuntu EXT4 partition that is allocated on that disk, without the need to actually ...
0
votes
1answer
71 views
Dealing with different usernames when mounting removable media in Linux
I have a laptop in which my username is, say, "foo". I have an external drive, formatted with Ext4, for which all files are owned by "foo" (at a filesystem level). Now, I have a desktop in which my ...
0
votes
1answer
2k views
Unable to repair an ext4 filesystem with bad superblock
Using the dd command, I was hoping that I would be able to copy over the first 446 bytes from Disk B (250GB) to Disk A (80GB), in order to make Disk A bootable just like Disk B. I issued the command:
...
1
vote
2answers
149 views
Drive system file size
When i made a new drive it take some space for system file
FAT32 take the less space, then NTFS, then ext4
my question how to know the space will be taken for the system before make the drive, if the ...
3
votes
2answers
2k views
how to convert NTFS to ext4 in windows?
I want to convert one partition of my windows which is NTFS (or can be FAT32) to a linux file system partitioning?
I'm looking for some tools or ways to do it for me!
7
votes
2answers
4k views
SSD: NTFS vs EXT4
Always when I read about SSD usage under Linux, the advice is to disable journalling in Ext4 (or use Ext2), since it's too bad for your SSD. But in all articles about SSD tweaks for Windows, I never ...
1
vote
1answer
304 views
Recommendations for Filesystem
I have built the bones of a NAS system (which comprises of Ubuntu server 11.04 on 500GB SATA drive, and 3 2TB SATA disks in software RAID5 configuration)...
I'm looking for some advice on what ...
5
votes
4answers
5k views
Stuck choosing between ext4 and ext3 for the file system
I was in the process of installing Ubuntu 11.10, but got stuck choosing which file system to use.
ext3 and ext4; which is better for a personal desktop?
If ext4 is better, will it work well on my ...
7
votes
5answers
2k views
Is ext4 more expensive than ntfs?
I have just converted an NTFS partition to ext4, however the total space seems reduced from 421G to 415G. Where did the 6G go? And, the reserved space is grown to 199M in ext4, much larger compared to ...
2
votes
2answers
2k views
resize2fs seems stuck at pass 3 (scanning inode table) - what to do?
I have a machine running Arch Linux (2010, I believe) with a 6TB RAID-5 array hooked up to a Highpoint RocketRaid 2320. I've been having issues with the RAID controller's drivers and the latest Linux ...
1
vote
1answer
211 views
Identical hard drives with different sizes (formatting)
I have two hard drives, which are identical, same model though purchased at different times, but in all respects the same. Afaik the manufacturer hasn't changed capacity (Seagate expansion).
However, ...
4
votes
1answer
558 views
What filesystem should I use for a large amount of disk space in Linux (>32TB)?
I am trying to make a large file system in linux, but have run into problems with many of the common file systems.
JFS has a bug that does not allow expansion over 32TB.
XFS has a bug in the fsck ...
1
vote
1answer
592 views
Encryption, loop device and journaling file system on Linux
I've been reading up on tools like Truecrypt, loop-AES and Cryptoloop that use a "loop device" to create an encrypted disk volume within a file.
On the README page for loop-AES, it has this paragraph ...
6
votes
2answers
5k views
Why is an Ext4 disk check so much faster than NTFS?
I had a situation today where I restarted my computer and it said I needed to check the disk for consistancy. About 10 minutes later (at "1%" complete), I gave up and decided to let it run when I go ...
1
vote
2answers
4k views
mounting ext4 fs with block size of 65536
I am doing some benchmarking on EXT4 performance on Compact Flash media.
I have created an ext4 fs with block size of 65536. however I can not
mount it on ubuntu-10.10-netbook-i386. (it is already ...
1
vote
1answer
162 views
Questions about solid state drives?
How to tell if a hard drive is solid
state drive? For example:
For one laptop, its hard drive is 244GB Western Digital WDC
WD2500BEVS-08VAT2 (SATA)
For another, its hard drive is 98GB ...
7
votes
2answers
200 views
Which ext4 features are missing on an upgraded filesystem?
Which ext4 features will be missing on a filesystem upgraded from ext3 to ext4 using the instructions here?
The text explains:
There are additional ext4 features, such as flex_bg and > 16TB ...
1
vote
1answer
1k views
Upgrade root (also boot) filesystem from ext3 to ext4 on Debian
After upgrading a Debian system from 5.0 to 6.0 (Lenny to Sqeeze), how do I go about upgrading the root filesystem (which in this case is also boot) from ext3 to ext4?
3
votes
2answers
274 views
Invalid size displayed for SSD
I have an 80GB Intel X25-M SSD drive installed on a Linux box running Debian 5.0. The file system on the SSD is ext4. I've had no problems with the drive, and have been using it for quite some time ...
1
vote
2answers
109 views
Is it possible to restore a backup on different filesystems?
I'm now using Ubuntu 10.04 with ext4 and for the second time in my life I experienced data loss (not for real: I got backups) and I'm assuming problems with the recent ext4 fs.
I want to restore all ...
4
votes
3answers
9k views
Ext4 undelete utilities?
Has anyone has success recovering deleted files from an ext4 partition? I've tried various utilities, but none have worked yet. I'd be grateful if someone can share a success story!
2
votes
1answer
387 views
Determine which sectors of a hard disk a given file occupies?
Is there a way I can see which sectors of the hard disk a given file occupies?
The filesystem is ext3 or ext4 on Linux.
2
votes
1answer
647 views
Finding out the time a filesystem was last mounted
I want to find out the last time a filesystem was mounted on Linux (Debian).
Any help?
Cheers
Michael
0
votes
2answers
3k views
Will these instructions work when turning of journaling on an ext4 SSD?
I have an Acer Aspire One with an SSD for storage. I recently installed Ubuntu on it and chose ext4 for my filesystem. Then I read that journaling on an SSD isn't the best idea, so I will try to ...
1
vote
2answers
288 views
Filesystem to quickly get recent modifications
I've got relatively big filesystem (ext4) with lots of small files and I'd like to backup it. Making full backups often is not feasible to me so I want to have a way to make differential/incremental ...
1
vote
4answers
423 views
ext4: directory takes 250GB instead of 20GB ?
i have gentoo linux x64 kernel 2.6.32-gentoo-r1 using ext4
i have a 260GB drive and it seems that 99% is taken.
(ufk is my home directory)
du -hl --max-depth=1 ufk
the output shows alot of ...
16
votes
5answers
7k views
Major practical differences between ext3 and ext4 - if any?
Assuming there's no need to worry about compatibility with older systems, I expect it's always better to use the latest stabile linux file system, which currently seems to be ext4.
However it seems ...
2
votes
3answers
3k views
Linux File system for a 1 TB External Hard drive
I have a 1TB external seagate hard drive that i use it with my dell inspiron 1525 laptop running UBuntu 9.04. I dont intend to share my hdd with anyone, so my laptop is the ...
