Ubuntu :: Does An Ext4 Filesystem Being Used Only For Data Storage Require A Swap Space
May 6, 2011
I am running a dual boot system with Win7 on /dev/sda and Ubuntu 10.10 on /dev/sdb
I also have a 250 GB disk I use for storing backup data, /dev/sdc
The two logical partitions on /dev/sdc (/dev/sdc2 and /dev/sdc5) each take up 2.86 GB and I would like to free up that space if possible.
Since the filesystem on /dev/sdc doesn't have an OS on it, does it still require that those two logical partitions exist?
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Dec 26, 2010
I have a 6x1TB RAID5 set up for testing on ubuntu created with mdadm and formatted with an ext4 fs.
This is being shared over CIFS for windows clients. When looking at the fs from both the file box and the clients, it says 4.47TiB total capacity, and 4.24TiB free space. The only folder is Lost+Found which is empty.
I don't have much experience in Linux filesystems as of yet and I don't understand where this 300 gigs has gone!
Is it something to do with journaling?
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Aug 5, 2011
On my drive I had 2 partitions for an Ubuntu 9.04 (swap, /) and one partition for Windows. I figured out that I should upgrade my Ubuntu, so I deleted the "/" partition and in its place created 2 new partitions (/, /home) .
After installing the latest Ubuntu 11.04, I realised that although I had backuped everything I needed in a 2nd disk and I could access those folders and their data from my Ubuntu 9.04, both my Windows and the 11.04 can locate neither the folders nor the data now. I have no idea why this happened (perhaps some issue with the mounting?) I have tried the trial version of Stellar Phoenix linux data recovery tool, but it cannot locate the old partitions.
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Feb 16, 2010
Original disk:
XP NTFS primary
Linux / ext4 logical
Linux /home ext4 logical
Win 7 NTFS logical
NTFS data logical
swap space
NTFS recovery partition
I tried to install linux, as there was a problem with XP overwriting grub, I chose write grub to /dev/sda8 (which is where the linux install was appearing earlier).
I guess this borked the filesystem somehow. Now the NTFS data partition and the swap space are appearing as one free space.
Well actually before that some linux live CDs (including gparted were seeing the entire drive as unpartitioned). I had to go into XP and delete the /ext4 partitions.
Is there any way for me to recover the NTFS data partition ?
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Jul 26, 2010
Is there a way to make Mozilla Thunderbird not allow anyone to view my offline storage without my password and to make it so whatever data it does store on my computer is encrypted with my password? Or is there another client that will do this better? I don't like the idea that anyone could waltz into my office and read my old emails.
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Dec 7, 2010
Lucid on an Acer Travelmate800.Can anyone tell me why I have 0k for swap space? I allocated swap which I can see in my Disk Utility's 'volumes' display.
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Sep 19, 2009
I was impressed to be asked on Fedora 10 if I want to upgrade to Fedora 11 but the first time I tried I had this error:
Not enough space in /boot/upgrade to download install.img.
My boot partition is 99MB and AFAIK that is not unusual so I tried tidying up a bit, uninstalling all except 2 kernels, and now have about 80MB for whatever needs to be downloaded in /boot/upgrade. But I get the same error. I can fix this by using wired instead of wireless networking but I want to know for planning purposes (next time I create a boot partition) how much space is required?
$ ls -l /boot/upgrade
total 21594
-rw-r--r-- 1 root root 18985802 2009-06-03 00:02 initrd.img
-rw-r--r-- 1 root root 3035056 2009-06-03 00:02 vmlinuz
Should I delete these? It looks like they might be left over from last time but I assume preupgrade knows what is junk and what isn't.
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Aug 31, 2010
Just wanted to see if any one had this experience? I just did a fresh install of the recent LTS and saw it made a whopping 8 1/2 gig swap on a new pc I have 3 gigs of ram in? Im a try to resize as I have already done my customizing to it.
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Apr 16, 2010
am having issues with a corrupted ext4 filesystem. My machine has run flawlessly for weeks, then all of a sudden I am getting messages that I can't access various directories, and on reboot fsck dumps to a command line. So far I have been able to fix the problem by manually running fsck. However, this is the second time that I have run into this problem; the previous time I ended up throwing out my hard drive and doing a clean install.I am running a clean install of Karmic Koala, software RAID, 4 Gb RAM, two 500 Gb Western Digital SATA drives, with an Intel E7200 2.53 Ghz dual core processor.Among other applications, I run VMware 7.0 for the occasional task for which I need a Windows program.
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Apr 30, 2010
I run an upgrade and an update on a lucid lynx beta 2. --- got no problems. but about the filesystems i have some questions because it seems for me that at every system boot the system will run an fsck. somtimes it's shown up, somtimes not. but in /var/log/messages and in syslog
I have always following messages ( occured in beta 2 too ).
But first before i continue - here my disk layout:
And here my filesystem types:
This is my problem because those values are seems to be static ! ( note: this partiton is mounted but not in use ) and last not least: the drive is an external usb scsi disk. but on the other side lucid lynx is running fine on my box.
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Jul 24, 2010
During the installation of Ubuntu 10.04 the partitioner was wrongfully configured to see a functioning btrfs partition as ext4 (without reformatting it). Thus the installation process got stuck at 5%.Installer was run again ignoring the btrfs partition.btrfs-tools was added to the new 10.04, but the btrfs partition is now recognized ast4 with lost+found folder on it.Tried to add the btrfs to etc/fstab as btrfs but t won't mount.Can the partition/filesystem type be changed so that this is actually recognized and mounted as btrfs, hoping my data is still on it somehow?
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Aug 20, 2010
Is there an Ext4 filesystem driver for windows?
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Oct 5, 2010
I have recently updated my ubuntu 9.10 install to 10.04. And with that I've tried to install snow leopard on my computer so i can dual boot between them.the install was successful, but grub2 (that worked fine) wouldn't see the OS X install on its own partition. so i tried reinstalling it, like you do after you install windows and it would remove grub as the bootloader.That didn't work and i got a lot of messages that it wouldnt work because my partitioning (or something like that) is GPT. by the end of it i didn't have grub installed at all!so i started playing around with GParted, and while doing that i also put a bios_grub flag on my main ubuntu install partition, thinking that it would force grub to load from that partition. But that just gave me the GRUB Rescue prompt when trying to boot.
So i unchecked the bios_grub flag. and now it doesn't boot to anywhere and when inserting the ubuntu live cd i cant even see the ubuntu ext4 partition and mount it.Gparted says that its a partition that its File System is undetectable and unknown.Is there any solution that will allow me just to mount that partition and copy files from it? (unfortunatelly my backups are a little older than i would like them to be)Heres what boot info script gives me: (the partition that i need is sda1)
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
[code]....
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Aug 18, 2011
I want to install 11.04 next to my working 10.04 system. First I need to make room for the new system so I have booted from a live cd and started GParted. In GParted the partition with the 10.04 system on it, /dev/sda1, has a red circle with an exclamation mark in it and I cannot resize it. When I doubleclick on /dev/sda1 there is the following warning
Quote:
Failed to change to directory '.'(Stale NFS file handle)
Failed to change to directory '.'(Stale NFS file handle)
Unable to read the contents of this file system!
Because of this some operations may be unavailable.
The following list of software packages is required for ext4 file system support: e2fsprogs v1.41+.
The 10.04 system is working and has worked like a dream for a couple of years and the machine has never had any other system on it. Why would the live CD not be able to read ext4 fs?
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Dec 13, 2010
I am developing a I2C CDROM client driver. The CDROM firmware supports TOC information read through a I2C command. It sends the TOC information in burst ( Interrupts a GPIO pin when it is ready ) and my CPU does a I2C read to read the TOC. When the CDROM firmware finishes sending the last data burst , it informs my CPU that it is done with the TOC, by a flag in the last data burst. I would like to know, which is the most efficinet way I can send these TOC information to userspace?
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Apr 28, 2010
I created a dual boot on my computer with windows vista and ubuntu using the wubi ubuntu installer for windows, and my ubuntu boot is limited to 15gb of hard drive space. My hard drive in actuality has about 150gb left on it. How do I expand the amount of storage ubuntu is allowed to use?
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Jun 30, 2010
I'm resizing an ext4 partition from 100gb to 40gb (I only used 20gb of it or so). Lets say partition is at /dev/sda1. I used
Code:
efsck -f /dev/sda1
to check it
Then I did
Code:
resize2fs -p /dev/sda1 40G
to resize it
When I check fdisk -l, the partition is still 100gb. I have a feeling I resized ONLY the filesystem to 40, but the partition is still 100gb. How do I finish this?
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Apr 19, 2011
On this LAN we have: Windows 7 desktop, 192.168.1.2 Ubuntu 10.04 desktop with ext4 filesystem, 192.168.1.5
On the Windows 7 system, how do you mount a Ubuntu "/home/myHomeDirectory" (ext4 filesystem) as "drive U:" ?
So that U: => 192.168.1.5:/home/myHomeDirectory One possibility is a commercial product called ExpanDrive.
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Sep 15, 2010
I need a cluster-safe filesystem for a SAN shared storage in Slackware. Red Hat's GFS is the best/only solution?Given GFS support in a custom kernel, what about tools (mkfs,mount...)?
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Mar 18, 2011
Is there a way that I can use my Linux ext4 file system, as such and then use it on some other computer.I have a dual-boot of Windows 7 and Ubuntu 10.04 and my partition table looks like this:My question might not be clear, so explaining it with an example.Can I copy my Linux partition on a flash drive and then use it on a different PC, with or without any need to install Ubuntu on new PC, by simply booting from the copied ext4 partition.This way, I can easily port my Ubuntu packages and other applications, settings etc. from one PC to other
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Dec 18, 2010
I'm about to do a clean wipe of my laptop, to try out Ubuntu. I've read quite a bit about dual-booting WIn7 and Ubuntu, but not alot about the process of installing. I'd like to install Win7 and Ubuntu on 2 small drives, and leave the rest for a Storage partition. But when should I partition that Storage Drive? Should I do it while I'm installing Win7? Or should I partition the amount of space to Storage after I've installed Ubuntu?
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Mar 6, 2010
I need to examine a hard drive that came from another system running Ubunut Server (not sure what version). I know the drive has LVM on it, so as far as I understand that means the drive will be treated as EXT4 for mounting. I can't boot from the actual disk, but I have used a IDE to USB connector to make a binary copy of the drive, which I've mounted as a loopback device. However, when I try to mount the loopback device properly, I get this:
root@~je:/# mount -o ro -t ext4 /dev/loop0 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
I tried using -t ext4dev too, but that just gives an unknown filesystem error. The file I've got mounting in /dev/loop0 is a .dd file, created by imaging the drive using dcfldd on the server drive while it was mounted (as /dev/sdb). System I'm working on is running Ubuntu 9.10. All I need is to be able to mount the server drive so I can traverse the file directories, there's a few things I need to check on it. If needed I can dispense with the whole loopback setup and just directly connect the server hard drive again using the IDE to USB cable, but I'd rather not do that; it's imperative that the drive doesn't get altered, or at least as little as possible.
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Jul 2, 2010
I just got a new hard disk so that my "/" and "/home" partitions would be located at their own separate drives. All was well until i tried to expand my "/home" partition to fill up the entire drive that used to also have the "/" and swap partitions on there. Let me sketch the before-and-after scenario in GParted,
Before:
What actually happened after:
Gparted gave an error prompt after which i found out that the entire ext3 partition (/home) had been moved to the left but not yet expanded to the right, which is of course not a problem. However, for some reason it has labelled the entire ext3 partition as a swap partition!
I'm still running ubuntu from the usb flash drive, because i dont want to risk that the (120GB) swap area will actually be used and cause my data to be lost.
I guess my question is, can i relabel the swap partition as ext3 like it was before without formatting (ie without losing data)?
Here's the output of "fdisk -l", which doesn't show the swap area (the drive in question is "/dev/sdb"):
Code:
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Dec 15, 2010
I want to add unallocated (17.94GB) to ext4 (ubuntu). Is it possible? And how to do this?
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Mar 25, 2010
I'm building an Ubuntu 9.10 home server to essentially backup all my PCs to, serve media, and store other large data (I record music and film). Here's what I have as far as storage goes:
4GB CompactFlash: for OS
2x 500GB WD drives: intended for RAID-1 for backup (which I will in turn back to external drive on a weekly basis)
3x TB Hitachi drives: intended for RAID-5 for media and storage
Both RAIDs will be software-driven. Now, a few questions:
From what I've read, I can benefit from using LVM on top of the RAID. Is this true, and besides the complexity and potential difficulties in recovery in case of disaster, is there a downside to LVM?
Would I benefit at all from using smaller logical volumes on the RAID-5, or should I just make one at the full size of the drive?
Also from what I've read, it seems that XFS may be the best filesystem to use, from a stability and performance standpoint. Should I go that route, then? I suppose that if it IS beneficial to have multiple smaller logical volumes, then there may come a point that I need to shrink and grow these logical volumes, and if that's the case, it appears XFS is out of the question. What's the runner-up; Reiser? I currently have /swap and /home partitions on the CF card. I'd at the very least like to remove the /swap partition and just create a swap file on the RAID-5. Should I move my /home partition to the RAID-5 as well?
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Apr 30, 2010
I'm wondering if anyone knows what will be Squeeze's default filesystem. Will it be the proven ext3 or the newer (sometimes faster, sometimes slower) ext4?
I currently have ext4 and I have nothing to complain about. In fact, my overall experience has been very positive. Ext4 is definitely faster when fsck runs during boot.
What would be the cons of having ext4 as default in Squeeze?
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Jun 3, 2009
will it be possible to convert existing filesystem to new ext4 while upgrading from Fedora 10?
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Jan 31, 2011
I have installed ubuntu to my pc. i made 3 partitions. one for system, one for data and one for swap. two of them were ext4. after some time i have reinstalled ubuntu again. but this time i didn't put to format the second partition, but just mount it using ext4. after that i cannot open my files. checked with gparted shows that 2GB used, but with df 188MB. and in properties writes ext3/ext4 filesystem. i used chown, chgrp but didn't help. please help, these data are ver important. i cannot lose them.
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Jul 11, 2010
I've just bought a new SSD hard drive:Kingston SSDNow V-Series SNV125-S2/128GB 2.5'' 128GB SATA/300The question is which filesystem whould you recommand and why?BTRFS vs NILFS2 or EXT4?If you choose ext4 would you enable jurnalling?I'm very close to choose Btrfs.Any experience with running any of these on your SSD?
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Sep 16, 2010
I have an Ubuntu 10.04 machine, and I would like it to host a folder over the Internet so if I am on another network (with a windows computer) I can log into it's folder and share and edit files among other users.
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