I'm currently building a Raid5 Volume Set (HW-Controller, 3 disks). After some diskussion I decided to don't use a partition since I don't see any disadvatages writing the filesystem (ext4) directly onto the device.
Because I plan to expand the volume set with 2 more hard disk drives, respectively the filesystem, to get the complete disk space available I read the ext4 manual. There is an extended Option called max-online-resize with the description:
Well, although I've searched for more details on the internet I can't find any. Primary in which case is it usefull to set this value because later resizing should be possible without to set this value. Maybe it accelerates the resizing process?
Next, I also plan to use the options stride=stride-size and stripe-width=stripe-width. Is it advisable to set these values for the final volume set (Raid5 with 5 drives) or do I have to set it for the first volume set (Raid5 with 3 drives) and then changing these values during the later resize process for the filesystem? (I personally prefer the first method).
I was wondering how to check the current mount options of my ext4 filesystems in Fedora 12? The only thing I can see in fstab is "defaults" but how can I know what is behind those defaults.mount command only shows "/dev/sda6 on / type ext4 (rw) but nothing else.I'd like to know a few more things like the data mode used like "ordered" or "journal".
I have installed ubuntu server LTS 10.4 on a HP MediasmartServer.It has four disks. On the first one I have the original HPFS/NTFFS partition (left untouched), a Linux ext4 partition for / a Linux SWAP partition and the rest of this first disk (sda) is part of a RAID 5 with the three other disks.I now have this first ext4 partion shown as full. Is there an easy way to give it more space without loosing the whole setup?I have 2TB of data on this server and everything is so fine.
I'm trying to install SL6 to a pair of 2TB harddisks in a RAID 1 array. The problem is that when the "Formatting" progress window that says "Creating ext4 filesystem on /dev/mapper/pdc_eahgdeafbgp1" comes up it appears to eventually freeze. It's been like that for 6 hours without the progress bar moving at least. I have another identical system that I booted up using the gparted live cd to see if I could get any more information using that. I first created a 500MB ext4 partition and mkfs.ext4 ran almost instantly. I then tried 5GB and it seemed to take maybe about a second or two and worked fine. I then jumped up to 500GB and it's been running for about 5 hours now. I'm pretty sure that I remember the creation of an ext4 filesystem occuring extremely fast even for very large partitions, but this is the first time I've played with RAID.
i have a fedora 11 server which can't access the ext4 partitions on lvm logical volumes on a raid array during boot-up. the problem manifested itself after a failed preupgrade to fedora 12; however, i think the attempt at upgrading to fc12 might not have anything to do with the problem, since i last rebooted the server over 250 days ago (sometime soon after the last fedora 11 kernel update). prior to the last reboot, i had successfully rebooted many times (usually after kernel updates) without any problems. i'm pretty sure the fc12 upgrade attempt didn't touch any of the existing files, since it hung on the dependency checking of the fc12 packages. when i try to reboot into my existing fedora 11 installation, though, i get the following screen: (click for full size) a description of the server filesystem (partitions may be different sizes now due to the growing of logical volumes):
Code:
- 250GB system drive 250MB/dev/sdh1/bootext3 lvm partition rest of driveVolGroup_System 10240VolGroup_System-LogVol_root/ext4
[code]....
except he's talking about fake raid and dmraid, whereas my raid is linux software raid using mdadm. this machine is a headless server which acts as my home file, mail, and web server. it also runs mythtv with four hd tuners. i connect remotely to the server using nx or vnc to run applications directly on the server. i also run an xp professional desktop in a qemu virtual machine on the server for times when i need to use windows. so needless to say, it's a major inconvenience to have the machine down.
I can't seem to get past step 6 of he installation of Ubuntu 10.04. I get the error: The ext4 file system creation failed... on single partition (no raid). I chose ' / ' as the mount point, and have tried with and without a swap drive. I'm installing on a Sony VAIO VGN-NS160D, and the HDD was previously formatted to NTFS. There's no other OS so I don't see any way of getting a command line to try a sudo fdisk..
I got a problem booting ubuntu 10.4 RC but i solved it by replacing root partirion uuid in grub boot menu then I disapled totally uuid passing to linux from /etc/default/grub . but something else i noticed why grub choosed insmod=ext2 why not ext4 specially I use now ext4 .I tried by editing the grub boot menu replacing "insmod=ext2" by "insmod=ext4" it booted and the three lines error during booting that i used to see them science ubuntu 9.10 totally disappeared . really I dont understand can anybody explane for me.and if what i did was right ,can anybody tell me how to make grub always and permenantly detect ext4 as ext4 not as ext2.
I had 5.4 machine. Upgraded to 5.5 today via yum upgrade. All went fine. Rebooted. Wanted to convert root partition to ext4 (I have three partitions: /boot, / and swap). All of them on software RAID 1 (root is /dev/md2). I did the following for converting
yum install e4fsprogs tune2fs -O extents,uninit_bg,dir_index /dev/md2 nano /etc/fstab # I indicated here that my /dev/md2 is of ext4
Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.
Now the array is (logically) no longer able to start:
mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]
Code: mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.
So I have the burned ubuntu CD, and I'm attempting to install it on a system that has one HDD with XP/Vista on it, and another that is completely formatted and unpartitioned. However, when I boot to the ubuntu CD, I can use the menus from the bottom, and select the language when initially prompted, but I can't select any of the menu options except for boot from first hard drive.
For example: [URL] . New version, but nothing about ext4. Does this mean v2.6.36.1 has nothing new about ext4? Nothing was improved in ext4 in this version?
how to convert ext3 to ext4? I'd like to convert partitions which I use for virtual machines (vmware-server and virtualbox). I use Ubuntu 9.10 as vmware-server host and Gentoo as virtualbox host.
I have slackware 13 ext4 partition. Debian lenny ext3 partition. and a /data ext3 partition Debian contains the grub boot loader i've been using to boot slackware. I'm going to wipe debian and I installed grub to /data with knoppix cd. Grub on debian booted into slackware just fine, but the grub I installed (onto data partition) with knoppix live cd does not find the slackware kernel. I am using the exact same menu.lst. apparently debian grub had ext4 support, but knoppix does not. both are grub .97. Is there a way to add ext4 support?
Just rm -rf *'d home/me/ directory... tried extundelete, didn't recover more than 10% of data.. trying scalpel, taking forever..Anyone know of a sure fire way to recover data from ext4?
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
I'm installing Windows to update my BIOS. I've removed a previous partition but I can't merge free partition to my original partition containing data. How to solve this problem? I don't want to format the ext4 partition.
How can I access a Linux partition from Windows? How to read EXT2 from Windows 7 64-bit? Does a ext4 reader for Windows exist?
I am currently in Windows and was wondering if there is any way I could mount my Linux partition, so I can access and transfer files? The file system is ext4
I'm dual booting Ubuntu 9.04 and 10.04 on an ASUS P5VD2-MX SE mobo with 3 hard drives, a couple of DVD writers and a multi memory card reader (USB).
The hard drives are:- 1 250Gb SATA MAXTOR STM325082 1 80Gb PATA HITACHI IC35L090AVV207-0 1 80Gb PATA MAXTOR 6Y080P0
9.04 lives on 2 ext3 partitions of the 250G SATA 10.04 on the 2 ext4 partitions of the 80G MAXTOR The HITATCHI has 1 ext4 partition mounted as a common data area for each O/S The 250G drive has GRUB Legacy in the MBR with its files in a small ext3 primary partition chainloading the 2 O/S's, GRUB Legacy for 9.04 and GRUB2 for 10.04. It also contains the common SWAP partition (primary)
When I boot into 9.04 everything works as expected with as far as I can see no unusual disk activity even when the ext4 data partition and the 2 10.04 ext4 partitions are mounted. When 10.04 is booted however, after about 5 minutes (irrespective of whether or not the other partitions are mounted) I see the hard drive activity light come on and stay permanently on. The system monitor shows nothing unusual. dstat doesn't give any clues either. I've tried running iotop but it fails with a missing CONFIG_TASK_DELAY_ACCT error.
Is this a known problem with ext4, should I rebuild 10.04 onto ext3 partitions? Are there some special ext4 mount parameters I should use? (I simply copied the fstab lines from 9.04 and just changed ext3 to ext4). I've read that the journaling process(es?) for ext4 by default commonly access the drive(s) every 2-3 secs but that should just cause a flicker surely.
I need a program that allows windows xp to read EXT4 partition. ext2explore.exe is not good, it doesn't give other windows applications direct access to ext4.
Quad processor, huge RAM, and more disk space than he knows how to use. So he decided to make it a tri-boot machine. He is a Mac 'biggot' (don't we all have our preferences?) but has been developing plugins for Cinema 4-D so he wanted to be able to span the spectrum.At any rate, we were chatting and he mentioned that he would like to be able to 'see' his Linux (he is using Ubuntu) drive while booted up in his Mac system.
I am having a system with NFS SERVER's and NFS client's. In my system, NFS Client transfer data when NFS server crash or network crash. NFS SERVER wait more than 10 minutes (I don't know real waiting time).My question is how to control that waiting time ?. can i set that time is 5 minutes. then NFS server will wait for 5 minutes after NFS server crash.after 5 minutes NFS client will give a error message ( to APPLICATION)
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 disable journaling and I have found these intstructions [URL]..
# Create ext4 fs on /dev/sda10 disk mkfs.ext4 /dev/sda10 # Enable writeback mode. This mode will typically provide the best ext4 performance. tune2fs -o journal_data_writeback /dev/sda10
I will use them on my boot partition. Are there any particularly bad parts here, or are there any missing steps? Will my boot partition be fit for being on an SSD after this? Or should I consider switching to ext2, or even reinstall it all and choose ext2 at partitioning time (I'd rather not though, since I've configured quite some stuff already)?
I want to install Ubuntu to a USB Flash drive (so I have my Desktop everywhere and can customize it as I want). I'm still choosing what's the best filesystem for the USB; Ext2 with no journaling or Ext4 with journaling but performance increase? I know that journaling will probably reduce the life of the USB flash drive dramatically, so is Ext2 the obvious choice? Or is it a bad idea to install Linux (Ubuntu probably) on a USB Flash drive? I tried running a live CD from the USB drive, but it wasn't very customizable - which is the point of carrying my OS with me.
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 cannot mount it on ubuntu-10.10-netbook-i386. (it is already mounting ext4 fs with 4096 bytes of block sizes) According to my readings on ext4 it should allow such big block sized fs. I want to hear your comments.
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.
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.
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?
