Ubuntu :: Mirror A Partition Without RAID ?

Feb 11, 2010

I have two hard drives inside an Ubuntu 9.10 machine, each with a data partition on. What I want to do is as I save files to one data partition partition (or delete them) I want the files copying/deleted automatically on the the other data partition. I do not want to start using RAID or end-of-day incremental backups.

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Server :: How Long Does Hardware Raid Card (raid 1) Take To Mirror 1 TB Drive (500gb Used)

Mar 22, 2011

How long does hardware Raid card (raid 1, 2 drives)take to mirror a 1 TB drive (500gb used)?Is there a general rule of thumb for this?4 hours? 12 hours? 24 hours?

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CentOS 5 Hardware :: RAID Mirror Not Loading?

Nov 28, 2009

I recently setup a software RAID1 with two hard drives for testing. I manually unplugged one hard drive to test redundancy and it was fine. I then did the same to the second and plugged back in the first and it was fine. But when I plugged both back in it is only loading one of the mirrors instead of both. I am guessing when the mirror (failed), at least as far as the system knew it removed it from the load sequence to prevent data corruption... how do I go about re-enabling it?.

cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1]

[code]....

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Ubuntu :: Broke A EXT4 Software Raid 0 Mirror. Need To Recover Files?

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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General :: Setting Up RAID Or Mirror Drives On The Hardware Level?

Sep 16, 2010

How can I mirror drives on the hardware level? I have a Sun X2270 server with 4 1 terabyte hard drives and need to mirror two drives.

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Server :: Soft RAID (mirror) On Debian With Different HDDs Size?

Apr 18, 2010

I would like to build a NAS from PC (D510MO) running Debian. I have two HDDs (one 3.5 1T and one 2.5 500G).
On 3.5 HDD I have already two partitions 100M+40G dedicated for Win7-64. Now, I want to install Debian (second OS) on this PC and to have some kind of soft RAID or disk mirror of 500G space. I am planning to create a third partition on 3.5 HDD of 500G (identical as 2.5 HDD size) in order to have a mirror 500G space.

Please send my some suggestions on where I have to install Debian; on 500G 2.5HDD or 500G 3.5HDD!Will Debian boot from both HDDs 3.5 or 2.5 after I create the mirror? What Linux soft I have to use for mirroring (mdadm)?

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General :: Mirror The Boot Partition On Existing Raid1?

Feb 26, 2011

I have a raid1 setup on a machine. Recently it died and I thought one of the drives had failed as it was shooting errors. So I tried unplugging that drive get it to boot off the mirror but it seems the techs forgot to mirror the boot device so the 2nd drive can't boot on its own. After a while it was realized that the sata cable was in fact bad and replaced so now its working again.

However, this occurrence showed a flaw in the setup where the RAID1 isn't working as its supposed to. I would like to correct this. Can I somehow mirror the boot partition so the 2nd drive will boot independent? I'm not sure how I would go about this. This is a CentOS 5 installation.

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Ubuntu Servers :: RAID-5 Recovery (spare/active) / Degraded And Can't Create Raid ,auto Stop Raid [md1]?

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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Ubuntu :: Any Way To Recreate LVM RAID 1 Partition?

Sep 6, 2010

How do I recreate an LVM raid 1 partition, without destroying data on the discs? I have a 650GB data partition which is a raid 1 array with ext3. Two days ago, the system (Ubuntu 9.04) started to refuse to write to it, claiming no space left on device - even if there is ca. 102GB free left, if the disk is 85% full (according to df)! Interestingly, removing a couple of GB did not help, after reboot the disk was again full..

I did the "tune2fs -m 0" trick and then forced file check on next reboot by "sudo touch /forcefsck" .. and the result is that the raid partition is gone. I have the two physical drives /dev/sd*, unmounted, but the /dev/md1 is no longer there. What can I do to re-create it, without losing the data? I realized that I ran tune2fs on the physical partitions /dev/sd* - was I supposed to run it on /dev/md1?

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Ubuntu Installation :: 10.04 USB LTS: Partition #1 Failed Raid

Jul 16, 2010

The ext4 file system creation in partition #1 of Serial ATA RAID isw_fjidifbhi_Volume0 (mirror) failed. Not sure what's wrong? How do I solve this? This happens after I enter my login details and click next. Then it fails on the install screen with this error.

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Ubuntu :: Fake Raid STILL Can't Partition In 10.04 Installer?

Jul 16, 2010

Been attempting to install ubuntu on my Intel fake raid on a new PC.The installer sees the raid, but errors out:Quote:The ext4 file system creation in partition #1 of Serial ATA RAID isw_ehbgbddej_Volume0 (mirror) failed.This seem to be the EXACT issue described in this bug report:I read all the way down this bug report, and at the bottom it says:Quote:Launchpad Janitor on 2010-06-25Changed in parted (Ubuntu Lucid):status: Fix Committed → Fix ReleasedA few weeks ago, a fix was "committed" and "released". I had been working with an earlier 10.04 ISO, so I downloaded 10.04 from the web site today. Still the same problem.Maybe I'm just reading the bug report wrong? If it says the fix is committed and released, I would naively assume that it is fixed. Do I need to patch to apply the fix or something? Doesn't seem likely.

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Ubuntu :: Using Swap Partition On RAID Volume ?

Apr 4, 2011

I am unable to hibernate my computer while using Ubuntu and I figured out the reason--Ubuntu is not using my swap partition. I would follow the existing tutorials on setting up a swap partition after installing Ubuntu, but since the volume uses hardware RAID 0, the swap partition is not assigned a /dev/ entry (like /dev/sdxx) and I am not sure how I can mount it.

Here is what I have:

Code:

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Ubuntu Servers :: How Do You Enlarge Raid 6 Partition

May 13, 2011

I am trying to grow my array to make full use of my drives. I have a raid 6 using mdadm on my home server. The array used to consist of 6 1.5TB drives when it was created. Since then I've been replacing the 1.5TB drives with new 2TB drives. And now I have replaced the last 2 drives.

When I added the first 3 disks I did not use the whole disk for the raid partition but rather made it the same size as the 1.5 partitions. As it turns out this may have been a bad idea. (But it gave me another 3 partitions of 500GB that I turned into 1 disk using mhddfs.)

Now I'm trying to grow the array. I've been testing in a virtual enviroment on how to do it but I cannot find another method than this :

1) fail 1 disk.
2) re-partition the disk with the size of the whole disk.
3) re-add the drive as a spare.
4) start the now degraded array to let it resync.
5) wait quite a while. (aprox 5 hours)
6) start again from step 1 for the other disks.
7) use mdadm with grow command to enlarge the array
use resize2fs to fill array to max size

Now although since this is a raid 6, I keep some redundancy but I still worry about degrading the array so manny times and rebuilding the whole thing. I mean I read the thing out 3 or 4 times over doing this.

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Ubuntu Servers :: 4TB Raid Partition For Server ?

Sep 1, 2011

Quote:

EFI GUID Partition support works on both 32bit and 64bit platforms. You must include GPT support in kernel in order to use GPT. If you don't include GPT support in Linux kernel, after rebooting the server, the file system will no longer be mountable or the GPT table will get corrupted. By default Redhat Enterprise Linux / CentOS comes with GPT kernel support. However, *******if you are using Debian or Ubuntu Linux,******** you need to recompile the kernel. Set CONFIG_EFI_PARTITION to y to compile this feature.

Is this true? Ubuntu has no GPT support native to the server install? Never compiled a kernel. Is that of itself going to be a mind bender? How much doo doo am I going to get into if I haven't done it a few times? Trust me when I tell you its no thrill formatting and reformatting a 8tb raid drive or the individual disks if it screws up. Been on that ride way too long already. Need things to go smoothly. This is not a play toy server, but will be used in a business.

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Ubuntu :: 10.04 LTS - No Option For LVM And RAID In Partition Scheme

Oct 21, 2010

I have installed Ubuntu 10.04 LTS on machine but wanted to choose RAID and LVM during partition scheme. Unfortunately I couldn't find such option during partitioning. Is it true that for Ubuntu 10.04 LTS it is unable to use RAID and LVM ?

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Ubuntu Servers :: Partition RAID Device (MD0) And Then Format It?

Feb 26, 2011

I am finally, and happily ditching Windows IIS, SQL Server, and ASP in favor of LAMP. Not only will I save a bunch of money on operating systems but I've found php and MySQL development to be much faster than their Microsoft counterparts.Currently I have two W2008 and two Ubuntu servers running and doing virtually parallel tasks. I want to can the W2008 machines but I am not 100% sure of my Ubuntu mirrors.Everything seems to be working fine. I've copied tons of data back and forth as a primitive test but sometimes things work fine for all the wrong reasons. Here's where I get confused.

Question 1:Do I need to partition the RAID device (MD0) and then format it?From my experience this is necessary to get the device to mount.

Question 2:In this case was it also necessary to format the individual drive partitions?

Question 3:If I do a daily cat /proc/mdstat is this all I need to do to check the drive status.

Question 4:Is there any other check I can do to assure that the mirrors are created, mounted, and operating correctly?

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Ubuntu :: MD RAID Partition Lost On Boot, Every Time?

Sep 1, 2011

I have two disks in a RAID.

Code:
SATA device C465.76 GBATA WDC WD5000AVDS-6
SATA device D465.76 GBATA WDC WD5000AAKS-0

[code]....

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Ubuntu Servers :: Separate Non Raid Boot Partition?

Aug 9, 2011

I have been working in my spare time over the last few days, Had problems with the whole grub2 not installing on RAID 1. Then I found out that I had to have a separate non raid Ext4 partition on one drive with "/Boot" as mount point and install went though fine.

My question is, will the developers FIX this. I mean if I only have 2 x 2tb drives in teh pc as RAID 1, and the one fails with the boot partition the whole machine goes down. Kinda defeats the whole RAID feature huh.

I USED to run a windows network with RAID 5 servers, and windows never had a problem installing everything on the RAID. Or even setting up RAID 1 in the bios on the PC and installing XP or NT4 on the RAID 1. There was never a need for a separate non raid boot partition.

Do we need a separate RAID friendly/enabled Grub? I guess for now I will get a 250gb drive and install the Server OS to it, and setup RAID1 manually after the server OS boots. Then will make a ghost type image of the server in case that drive fails so I can quickly install a new drive and restore the image and get it back up and running again.

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General :: How To Partition Server With RAID 1/10

Aug 26, 2009

I am trying to partition my server before installing CentOS and cPanel.I have hardware RAID 1/10 On RAID 1 I would have

/
/boot

On RAID 10 I would have

/tmp
/usr
/var
/var/log
2 GB swap
/home

Is it correct partionining setup?What should I have on RAID 10 ?

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Fedora :: Add Partition To Software Raid 1 ?

Mar 1, 2010

I have just installed a new version of fedora 12 64bit and have setup the following drive configuration -

Code:

But for some reason I am getting dm-1 and dm-3.

How can I change the array so it contains the normal /dev/sda and /dev/sdb disks and partitions?

Why is the system telling me my drives are dm devices? I have no bios raid features on the motherboard.

How do I use md-1 and md-3 partitions?

How do I go back to the traditional /dev/sda and /dev/sdb devices?

By the way the system tells me that /dev/sda1 and /dev/sdb1 do not exist.

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Red Hat / Fedora :: Add Partition To Software Raid 1?

Mar 1, 2010

I have just installed a new version of fedora 12 64bit and have setup the following drive configuration -

Code: [root@fedora ~]# cat /proc/mdstat
Personalities : [raid1]
md2 : active raid1 sdc1[0] sdd1[1]
312568576 blocks [2/2] [UU]
[Code]....

but for some reason I am getting dm-1 and dm-3.

How can I change the array so it contains the normal /dev/sda and /dev/sdb disks and partitions?

Why is the system telling me my drives are dm devices? I have no bios raid features on the motherboard.

How do I use md-1 and md-3 partitions?

How do I go back to the traditional /dev/sda and /dev/sdb devices?

By the way the system tells me that /dev/sda1 and /dev/sdb1 do not exist.

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Software :: Set Up RAID For Data Partition?

Jun 22, 2011

I'd like to set up RAID for my data partition.

My data are in /dev/sda5 (ext3).
There's an empty partition /dev/sdb5 (ext3).
I want /dev/sdb5 to be a mirror image of /dev/sda5, the command to invoke should be :

mdadm --create /dev/md0 --level=mirror --raid-devices=2 /dev/sda5 /dev/sdb5

My question is : how to ensure that the synchronization is done by copying data to the empty space and not the converse ?

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Ubuntu :: Recover Data From RAID 1 Where Partition Table Has Been Deleted?

Jan 12, 2010

I have 8.04 running mdadm raid 1. I selected the wrong drive in gparted and managed to hose my partition tables.

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Ubuntu Security :: Recovering Ecryptfs Partition From RAID Arrary ?

Jun 3, 2010

After a disastrous upgrade to 10.04 I am at my wits end trying to recover my /home partition from my unbootable system. The /home partition is part of a RAID5 array across 4 disks and I've been trying to use some disk imaging tools from Ultimate Boot CD to recover it with, but none of the utilities seem to recognize or will let me work with my multi-disk device.

Currently I've been booting up with a Live CD in attempts to mount the encrypted partition then copy all the files to an external device I bought, but the mounting process has presented me with some problems. The partition in encrypted with ecryptfs and I have both the disk's passphrase as well as an FNEK signature to work with. Attempting the following:

Code:

Another small issue is the cipher I used. I don't remember which kind of encryption the disk is encrypted with (80% sure it's aes though). I assume figuring out which cipher I used will be more like a guessing game through the ecryptfs mount prompt, but I'm wondering if this would affect the error message I get.

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Ubuntu Installation :: Server Detects But Can't Partition Hardware RAID 5

Jul 13, 2010

I am trying to install Ubuntu Server 10.04 on a home server I am making. I have 3 1-TB drives set up in RAID 5 via my mobo (ASUS M2NPV-VM). The installation detects that I have a RAID array, but when it goes to partition, all it shows me is the usb stick I am installing from.

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Debian Installation :: 8.0 - Need To Mount Raid Partition

Dec 21, 2015

Have a new debian install on a asus h170m-plus (was going to use ubuntu but didnt support the hardware/software combo i needed)

Install is fine. but during install it didnt see my 1tb raid1 drive..

after reboot, debain boots great, and i can mount the raid drive in the file manager.

I can see it and in mtab it shows up :

"/dev/md126 /media/user/50666249-947c-4e8f-8f56-556b713a6b6a ext4 rw,nosuid,nodev,relatime,data=ordered 0 0"

How can I permanently add this mount point so it is found at boot up at /data...

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OpenSUSE Install :: Raid 0 Partition Don't Mount?

Jun 9, 2011

After an install of suse 11.4, one of my drives raid 0 (ichr9 intel) does not mount and is not recognized as being formatted in NTSF, while the other unit raid 0 (ichr9) is recognized without problems?

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Hardware :: RAID Partition Not Showing On Boot?

Mar 11, 2010

I have 4 hard disks. 2 pair of RAID 1 (mirror). Both use the same RAID controller - Intel Marvell.When I boot, this is what is listed in /dev/mapper/:

Code:
crw-rw---- 1 root root 10, 59 2010-03-11 20:58 control
brw------- 1 root root 252, 0 2010-03-11 20:58 isw_bbjfjjdcg_Volume0

[code]...

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General :: RAID At Root Partition In Debian ?

Feb 11, 2010

The RAID level 1 interested me because of its redundancy in both drives. And I successfully made it in a couple of partitions. But, I always did it after Linux installation. Then, I create both partitions, use 'mdadm' to create raidtab and RAID device (md0, for example) and then I format the RAID device with 'mkfs' and mount it.

Until there, it's all OK.

But my problem is to mirror ALL the hard disk, inclusive root partition. To do that, I guess I need no Linux installation, then create the RAID (md0, raidtab, etc) and after that install Linux in RAID device created.

But I'm new in Linux world and I have no idea how to do that.

I use Debian Lenny, so I need a solution that uses only the first DVD of this distribution.

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General :: Removing The RAID From An EXT2 Partition?

Aug 11, 2009

This might be a longshot but i used to use the 4 bay NAS here Which formated the HDD JBOD array to EXT2 , Anyway i want to move to an 8 bay DAS now but i cant find an application to convert the partitions .

Partition magic says the partitions are unformatted and the partition id is set to linux raid auto . Is there any way to convert this partition to vanilla EXT2 so i can use partition magic on it ? Its a 4TB array so copying isnt possible.

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