Ubuntu Servers :: Ext4 Full With Raid 5?
Jun 4, 2011
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.
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Mar 12, 2010
I have a total of 4 hdd's, 500gb 7.2rpm that I would like mirrored using raid 10. As you can see from the image, ubuntu 9.10 server isn't recognizing the full 2tb's. In fact, I'm not even sure about the configuration as I was thinking the HDD's would come up as four 500gb hdds. Instead I have the configuration above set and ready for Ubuntu to be installed on.
1. Is this typical of a server pre-configured from Dell(perc6 raid controller.
2.Why is ubuntu not recognizing the full capacity of the drives especially when it's a server install?
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Feb 1, 2011
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]
I was able to examine the disks though:
Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....
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.
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Dec 29, 2009
How can I format a USB hard drive to ext3/ext4 or whatever file format and have full permission to read, write and execute all files afterwards? When using the command line (as ROOT of course) mkfs.ext3 /dev/sdb? Restricts the rights to ROOT as does the procedure gParted. The man mkfs did not help much. Configuring the fstab- file is a bit of a hassle, so it would be nice, if there was an option to set the permissions "correctly" right from the beginning. Setting Ubuntu (I'm using Ubuntu 9.10) up, so that it mounts USB devices not as ROOT as default but giving all users all permissions seems to be really complicated, as a guy from my local LUG told me.
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Feb 3, 2010
I've been using full disk encryption with luks on two Dell laptops for about 2.5 years. One is 64 bit Fedora (upgraded to 12), another is 32 bit Ubuntu (upgraded to 9.10), both were ext3, until recently.Over time, performance degraded substantially, especially on Fedora, which was put to a heavier use. That laptop has 4 Gb RAM, two 2.5 GHz T9300 CPUs, and 56 Gb of free space.
It was especially unbearable after a reboot. Programs like firefox and thunderbird would take close to a minute to start when ran for the first time after a boot. The login process was painfully slow, and some Gnome applets (e.g. Tomboy notes, keyboard layout switcher) would fail to load on the first login, with an error. I experienced this problem on both laptops with full encryption. I had to log out and relogin to make the applets appear. I tried various boot and mount options and was thinking about switching to ecryptfs (encrypted home).
I also use 3 desktops with no encryption and a netbook with ecryptfs on /home, which all work fine. All are Dell, 2 Ubuntu and 2 Fedora. The Gnome applets problem seems to be due to slowness of the installs with the full disk encryption. The last thing I tried is to migrate ext3 to ext4. I also converted /home, /usr, /opt to extents, following[URL].. That seemed to do the trick. Gnome applets now load fine on both laptops, and startup time is back to tolerable.
Is this a typical experience: ext3 performance degradation with time and a much better performance with full disk encryption once ext3 is migrated to ext4?
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Nov 16, 2010
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).
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May 31, 2010
I have a MSI Board that had this hard drive configuration.
200GB x Single EXT4 Ubuntu
320GB x Raid Mirror NTFS
320GB x Raid Mirror NTFS
[code]....
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May 24, 2011
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.
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May 14, 2010
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..
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Feb 8, 2011
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.
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Dec 11, 2010
convert ext4 to NFS?
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Mar 29, 2010
I've already asked this in the mythbuntu and didn't get an answer there so I'm trying here. OK just added another 2Tb WD drive to my mdadm controled RAID5 array, and the reshape is finished:-
Code:
Code:
Mar 28 18:28:36 alpha2 kernel: [104357.343421] md: md1: reshape done.
Mar 28 18:28:36 alpha2 kernel: [104357.525114] RAID5 conf printout:
Mar 28 18:28:36 alpha2 kernel: [104357.525119] --- rd:4 wd:4
Mar 28 18:28:36 alpha2 kernel: [104357.525122] disk 0, o:1, dev:sda2
[code]...
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Jul 24, 2011
I need to convert my server(10.04) to ext4 from ext3 and want to make sure I am going to do this the correct way.
Edit fstab to ext4
Code:
sed -i s/ext3/ext4/ /etc/fstab
Run the tune2fs command, the filesystem is mounted is this ok?
Code:
tune2fs -O extents,uninit_bg,dir_index /dev/md0
[Code].....
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Jun 3, 2010
i have a slave disk with some data formatted in ext4 , now i have 95 % of inode used ( and 50% of used space )how can increase inode ?
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Apr 23, 2010
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.
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Jun 30, 2010
So i just installed ubuntu server 8.04. Got everything set up and started putting my files on it. 6 Hours of copying later I get a message saying that my Disk is full. This is a 1.5TB HD and it stopped copying at 269GB. fdisk shows the drive as 1.5TB, and ls -sh shows that only 269GB have been used. Yet I cannot add any more files. The other weird thing is that df doesn't show the hard drive, yet I know it is mounted and accessible. If it makes a difference I have it formatted to ext3.
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Jan 28, 2011
I've got Ubuntu 10.10 Server installed in a VirtualBox. I'm stuck in 640x480 screen resolution when I put VirtualBox in full-screen mode.
How can I change the startup resolution on Ubuntu so say, 1152x864 and make it stick upon reboot?
I found a thread here on the forums a while ago but I cannot find it anymore...
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May 18, 2011
1 Areca controller 1222 divided into 2x250Gb in RAID 1 for my Ubuntu installationm6x 2Tb in RAID 5 for my data (mounted as logical drive) resulting in 8Tb of available space (also visible in the disk utility of Ubuntu) Ubuntu 10.04 LTS
Now the problem; when I check the capacity in the file browser on my mounted data drive, I only see 5,1 Tb of total space.
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May 19, 2010
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
[code]....
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Oct 20, 2010
On a ubuntu 9.10 server. The problem is that when I try to mkdir in /var/local/ it says th disk is full but running df -h outputs:
Code:
I cannot see what's eating up my space in /var.
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Jul 4, 2010
I have Bind on the machine at present, but I was wondering how much disk would be needed to make it a full DNS server that could act in place of a dead upstream service.
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Jan 16, 2010
I have three WD 1.5 GB harddrives. 2 of them already in a linear RAID also called Concatenated i think. (the same as JBOD). Can i add the third drive to the RAID without losing data? Update "Using mdadm software raid."
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Jan 26, 2010
I have two drive on my Ubuntu server. I have a 40GB IDE 5400RPM and an 80GB SATA 7200RPM.
Is it at all possible to RAID 0 the two of these drive? I know it's pretty unorthodox, but it's what I've got without having to buy anything.
If so, what are the limits, cons, and/or potential pros of doing a RAID of these two?
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Mar 4, 2011
I am attempting to run Ubuntu 10.04 Server on RAID 1 and am consistently hitting the same issue when trying to boot the system for the first time (after what seems to be a successful install of the OS). I am creating the RAID 1 using the directions found in the Ubuntu Server Guide. The error I receive when trying to boot the system for the first time is...
Code:
mount: mounting /dev/disk/by-uuid/f35415ee-4c14-4eb1-995f-f19fbcd760c7 on /root
failed: Invalid argument
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory
[code]....
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Jul 26, 2011
I've had this server for a while and I've periodically received similar errors, but it's been worse lately. I'm trying to diagnose and similar posts have left me with 2, maybe 3, ideas about what could be wrong. Here is the setup: Ubuntu Server 10.10 maverick kernel 2.6.35-30-server Sans Digital TR8 8 bay raid - 2 port multipliers to esata outputs 8 1TB WD Caviar Black Syba PCI-e card with Sil3124 chipset - 2 external esata inputs I do not use the RocketRaid 622 card that came w/the enclosure because I had problems with drivers and configuration so I went with the SI chipset. The raid is configured with mdadm, level 10, running ext3 file system:
Code:
root@i5server:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid10 sdb1[5] sdg1[2] sdd1[7] sdh1[3] sdf1[1] sde1[0] sdc1[6] sda1[4]
3906721792 blocks 256K chunks 2 far-copies [8/8] [UUUUUUUU]
[Code].....
What's odd is that the raid dropped out and completely locked up the computer multiple times, then marked one of the drives as failed. I did a readd on the drive and it rebuilt witout issue. Ran e2fsck -f to clean up the problems it had when it crashed, but as soon as I do heavy read/writes the errors start showing up again. This is primarily a media server for music and movies, but also for backups and printing. Heavy read/writes are generally transcoding movies and music which is what I was doing when it failed.
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Jan 28, 2010
we connected the new hard disk in the folder /home /newhdd it has alot of files and we gave access to the folder /home via NFS When we attach a folder on the remote computer is on a remote computer folder newhdd empty, while the other folders in the directory /home full like on NFS servers.
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Jun 30, 2011
For our workgroup I set up a server which is basically 10.04.2 with kernel 2.6.32-32-server on a SSD and all the data on a RAID 5 consisting of 4 2TB hard disks, thus a maximum of 6TB space for data on the RAID. Having multiple users with different amounts of data from different scientific data source I set up an lvm on top of the RAID
--- Physical volume ---
PV Name /dev/sdb2
VG Name home-data
PV Size 5,45 TiB / not usable 3,00 MiB
[code]...
Here is the problem: The volume Genomes (or /genomes) is half full
sudo df -ah
/dev/mapper/home--data-Genomes
1,9T 850G 920G 49% /genomes
but the system states it as full whenever I try to add more data (tried cp and rsync). There is no quota set to the volume (I have quotas in place for users home folders. These are only for max amount of disk space, not max file number, and I am still able to move/add files elsewhere so there seems to be no interference).
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May 17, 2010
I have a problem installing Ubuntu on an HP Proliant ML115. This server has a 1TB mirrored RAID setup (and 1 250GB drive), problem is, Ubuntu apparently doesnt like it, it detects the RAID but fails to partition the hard drives and the installation cant continue. I tried the guided partitioning using the whole disk (detected RAID array). Here is what syslog gives me:
May 17 22:32:30 main-menu[504]: INFO: Menu item 'disk-detect' selected
May 17 22:32:30 net/hw-detect.hotplug: Detected hotpluggable network interface eth0
May 17 22:32:30 net/hw-detect.hotplug: Detected hotpluggable network interface lo
May 17 22:32:31 hw-detect: Loading PCMCIA bridge driver module: i82365
May 17 22:32:31 hw-detect: FATAL: Module i82365 not found.
[Code]...
PS: Im very noob regarding this kind of stuff so detailed instructions please, also feel free to give configuration tips
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Jun 3, 2010
I'm having a problem with the installation of Ubuntu Server 10.04 64bit on my IBM xSeries 346 Type 8840. During the installation the system won't recognize any disk, so it's asking which driver it should use for the RAID controller. There's a list of options, but nothing seems to work. I've been searching the IBM website for an appropriate driver, but there is no Ubuntu version (there is Red Hat, SUSE, etc). I was thinking about downloading the correct driver onto a floppy disk to finalize the installation, but apparently no 'general' Linux driver to solve the problem here.
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Jun 15, 2010
I've recently completed a fresh install of 10.04 on a home file server and upgraded the hard drives in my storage array. My PREVIOUS hardware was:
Old version of Ubuntu (I forget which one exactly, but I know I had missed a few upgrade cycles)
3X 500 GB Seagate Baracuda's (for the array)
Areca 1220 Hardware RAID controller
Intel Core 2 Duo 6600
320 GB Seagate for the boot drive
I was running that hardware for about five years or so and it was rock solid. After the upgrade the hardware specs are:
Ubuntu 10.04
Areca 1220 hardware RAID controller
4x 1000GB Samsung
Intel Core 2 Duo 6600
320 GB Seagate for the boot drive.
The fresh install of Ubuntu 10.04 went remarkably well. The drivers for that raid controller are in the kernel, which is great. I was able to access the old array after upgrading Ubuntu. Now I am trying to create a new array with the four 1000 GB drives in a RAID 5. Obviously that gives a maximum storage capacity of 3 TB, greater than the 2 TB threshold that seems to be so important. I've been doing some digging and here is where my questions start:
it appears as though gparted doesn't support file partitions greater than 2 TB, correct?
it also doesn't seem as though parted supports ext3 or ext4, is that correct?
If this is the case, how do I create a partition with ext4 that is greater than 2 TB?
I can see the array volume in gparted (which is a relief) but it lists the size as 2.73 TiB, which I find curious because that is over 2 TB, but not the full capacity of the volume. I can also get to the volume in parted. But I see in the parted documentation that using the makepartfs command is discouraged and instead, one should use the command mkpart to create an empty partition, and then use external tools like mke2fs ( to create the filesystem.
how to proceed from here. What does the community think is the best course of action to create a partition of 3TB in ext4? Then I need to change fdisk to automatically mount the array at every log in, right?
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