General :: Recover Raid - LVM On Non System Drives After System Failure

Jan 19, 2011

I have (had) Debian Testing running on a 250GB IDE hard drive, partitioned normally.

I also have 4x 1TB drives in a raid 5 using mdadm, and 2x 500GB drives in a raid 1 also with mdadm.

I put the two arrays in lvm using:

I then used "lvcreate" to make storage/backup 300GB, and the rest went to storage/media (approx. 2TB usable). I put an xfs filesystem on both and mounted them.

All was working fine until the system drive shorted out and died on me this morning. As far as I can tell, all my other drives and everything else is fine. I do a daily rsnapshot of the filesystem, which of course is residing on storage/backup (stupid, I know). So I have full backups of everything, but I'll have to put a new hard drive in and reinstall Debian before I can restore everything.

I've reinstalled before and simply reassembled mdadm arrays and remounted them before with no problems, but this is the first time I've used lvm, so I'm not sure what I have to do to restore everything. Is it as simple as reinstalling the system then doing a:

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Hardware :: System Device Name For A RAID Of SAS Drives?

Jun 29, 2010

For SATA drives in AHCI mode, the names are /dev/sdX, what about a RAID-0 or RAID-1 array of SAS drives? Are they the same?

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CentOS 5 Hardware :: Using Asus P6T Built-in Intel RAID - CPU Fan Fails And The System Halts - Recover Data?

Jan 20, 2011

The situation: computer based on Asus P6T motherboard. Two RAIDS:

- 'boot', on motherboard built-in RAID controller (CentOS 5.5 installed on this RAID)
- 'data' on 3dware RAID card

At one moment a CPU fan fails and the system halts. After the fan is replaced, BIOS informs it's reset and all the inner controller data are forgotten. After I switch it to 'RAID' mode, it remembers it was a mirror raid (RAID 1) installed, but the file system on it is completely trashed.

The 'data' RAID run by external controller isn't affected by the system failure. Three questions:

- is it worth trying to install OS on the rebuilt 'boot' RAID once again? Looks like if BIOS settings are lost for some reason, there's chance of completely losing RAID data
- has someone encountered similar problem with built-in RAID nd was it possible to recover data?
- will the software RAID be worth creating instead of using hardware RAID to replace the 'boot' drive?

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Server :: Convert RAID 1 To NON-RAID System In Cent OS 5 System?

Jan 6, 2010

Here is my system: I have dell poweredge 1950 PERC 6 with 300 GB raid system. It has two disks of each 300GB RAID mirrored system. I have few applications and data that reached around 280GB. As you know, poweredge 1950 we can have only two disk.

They are not mission critical. Hence, I wanted to remove the raid system and use as a non-raid system. By doing it, The applications and data can grow upto 600GB. I do not want to loose the data and setup. I am not so clear about RAID system and its conversion.

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General :: Migrate An Installed Ubuntu System From A Software Raid To A Hardware Raid?

Jun 29, 2011

migrate an installed Ubuntu system from a software raid to a hardware raid on the same machine? how would you go about doing so?

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General :: Recover Data From Ext3 File System?

Jun 20, 2009

I have accidentally removed vmware virtual disk, my host operating system is RHEL5.2 with ext3 file system, i have used photorec, magicresue and foremost but still no luck to recover the vmdk file. i have seen in foremost configuration file that there are some predefined files (ex- doc, pdf, jpg, avi, zip, etc),

1. is there any way to add vmdk file extension on that configuration file?

2. if yes how can i do ?

3. by adding vmdk on configuration file, can i specifically use recover option for vmdk?

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General :: Wget Failure On My System

Oct 7, 2010

I want the wget command to work on my linux machine.This is the output of the uname command on my machine Linux kalpana

Quote:

I get the error -ksh: wget: command not found.So can anyone tell me how do I install the wget utility on my machine.

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General :: Recover Partition-Table Still Present In Running System?

Dec 1, 2010

I accidentially overwrote the first 1M of my harddisk on linux (using dd). So, the partition-table is gone. I can still access all partition (except the first one) using /dev/sda2 (and so on), so the data is still there. I only need the partition boundaries to restore the table. How can I do this? The Linux-Kernel must still know them because all mount-points still work. fdisk -l /dev/sda doesn't work because it acctualy reads the partition table.

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General :: Any USB Tool To Recover Partitions In Dual Boot System?

May 23, 2011

I have a dual boot Acer Aspire One, after reinstalling Windows back to "original factory", the way it was straight out of the box, it now will not boot up at all. It goes to the Windows start screen goes blank, and loops there infinitely. Is there a USB tool I can use to figure out what went wrong and recover either my Windows or Linux partition with out having to do a complete reinstall?

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General :: Deleted Root Directory - How To Recover System Data

Feb 27, 2010

I have accidentally ended up in deleting my root directory while I blindly fired command while watching movie.

I fired following command
#rm -rf ~/<SPACE>*.out
instead of this command
#rm -rf ~/*.out

Things already done:
1) Created /root directory relogged to get some of basic settings of gnome and Desktop.
2) Things went well now when I login my desktop ,gnome environment and other things looks to be working well only prompt on my terminal has changed. I can fix it any ways.

Things I want to ask:
1) I haven't studied much about contents of /root directory to best of my knowledge is it like other user's home directory with some basic configuration files for mostly required applications. SO my question is have I lost any thing important system file or something?
2) If I have lost any important configuration or system data how can I recover it without reinstalling whole system? (My opinion about this is, It is quite possible but to do so, as far as I know capabilities of linux. But I still want comments from experts before I try any things on it because I don't want to backup my whole HDD and reinstall the whole stuff again for me and also my sister's stuff in MS.)

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General :: Do Not Automatically Restart On System Failure

May 13, 2011

I need to know: how do not automatically restart GNU/Linux after a critical system failure(kernel panic). For some reason the pc is rebooted, actually throws the error screen Reboot just moments before, but I can't to read it before you reboot.

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Ubuntu :: Operating System Lose Data During A Power Failure As Windows Operating System?

Jan 13, 2010

Will a Linux operating system lose data during a power failure as does a Windows operating system?

(If yes.) This has not come up before but I'm going to be doing some work I don't want to lose.

Could you either point me to a backup tutorial or give me the quick overview of preserving stuff with Ubuntu?

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General :: Recover Files From Ext4 File System Overwritten By New Installation

Jul 3, 2011

My main hard disk died and I replaced it. After installing windows in a small partition in /dev/sda, I thought I will try linux mint and went for it. (I need windows to play AOE, but ubuntu is my primary OS)I didnt see the options properly or some distraction, I choose the "install alongside windows" option probably expecting it to install it in the unallocated partition next to the windows installation. I had completely forgotten my second internal drive /dev/sdb which has the backup data. Linux mint went and installed itself on that drive.

Is there a way to recover individual files from the second harddrive. Now if I boot or open it through live cd, all I see in the linux mint file systems. I want to aleast recover my CV/resume from the second drive. The second drive is a single ext4 file system The old drive is completely dead, it doesnt even get recognized when I attach it to SATA.

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General :: System Is Rebooting From A Crash/power Failure?

May 8, 2010

I'm trying to come up with a startup init script that will check to see if the system was shut down gracefully, or if it is rebooting from a poweroff or something similar?Anyone know of a way to check for this condition with the least amount of room for false positives or vice versa?My intial thought is just a startup script that will will check for a file on startup, and on a proper reboot/shutdown just touch the file. But id like to avoid that type of script if possible,

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General :: Internet Connection Failure In System / Sort It?

Jan 19, 2011

I am using Linux operating system fedora 6 .Before today everything is going well. But today internet connection gets failed. It can not connect to the server for the internet connection. But in the same computer,installed windows operating system shows the internet connection.Please try to answer my question why the Linux operating system can not connect to the internet?

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General :: Filesystem Loading Failure - System Will Reboot

Mar 11, 2010

An error occurred during the filesystem check. Dropping you to the shell; the system will reboot when you leave the shell.
Warning -- SELinux is active
Disabling security enforcement for system recovery
Run 'setenforce 1' to reenable

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General :: Your Debian System Suffered A Kernel Failure

Feb 10, 2010

This error message appears in the varlog

The situation is I removed the ADSL card from my desktop as I have no use for it for the moment. I am guessing that the motherboard is still trying to detect the Sangoma ADSL card. What is the best way to resolve this problem, uninstall the drivers for the ADSL card or change the settings in the system configuration files?

The system is not affected by this removal, just get prompted regularly about this error as configured in the kerneloops client.

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Hardware :: Mega Raid Showing Warning "0:0:RAID-1:2 Drives:153GB:Optimal Drives:2 (11528 Errors)"

Apr 8, 2010

i have cretaed RAID on one of my server RAID health is ok but its shows warning. so what could be the problem. WARNING: 0:0:RAID-1:2 drives:153GB:Optimal Drives:2 (11528 Errors)

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General :: See All The Drives On System Both Mounted And Unmounted?

Jul 22, 2011

How can I see all the physical hard drives on my Ubuntu system — regardless of whether they're mounted — as well as their partition info, sizes, &c.? I have three physical drives, but only one seems to be mounted. I'd like to mount the other ones too, as I have some data on them.

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General :: 3TB SATA Hard Drives Will Work Into An Old System

May 14, 2011

I have a 3 year old PC with 4 internal SATA ports. My old SATA hard drives, all smaller than 2TB, work fine. If I buy a 3TB SATA hard drive, will it work in Linux? Will Linux with GRUB be able boot from such a hard drive without a BIOS upgrade? With a BIOS upgrade? It's fine for me to upgrade my Linux to the newest kernel.

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General :: File System Is Best For USB Drives For Booting Systems?

Sep 29, 2010

iv been looking around at the different Linux systems particularity the smaller ones such as DSL, Slax and Puppy Linux. However i need a Linux distribution that doesn't have a GUI desktop environment just the plain old terminal to work on. The system would have to be able to boot from a USB drive also. If anyone knows a systems that fits those requirements or something else related please post. Also what file system is best for USB drives for booting systems?

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Ubuntu :: Login Via Gdm - Error Initiating Conversation With Authentication System - General Failure

Jun 13, 2010

I was having a problem with the keyring asking me for a password after I changed my user password. I googled it and found that since the password changed, I will get asked for the keyring password until I delete ~/.gnome2/keyrings/login.keyring. What happened was that I wasn't paying attention that you had to generate a new keyring password before rebooting.

Now, whenever I try to login via gdm, I get this message: error initiating conversation with authentication system - general failure

How do I get it working again? I can still login from the terminal.

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General :: How To Set Up LVM And Raid 1 With CentOS On 6 Hard Drive System?

Mar 12, 2010

I would like to setup a CentOS file server with LVM and Raid1. Having 6 x 500GB drives, 4 x 1GB Ram and a Quad Core Cpu, I am considering to configure 3 hdd as LVM then raid 1 to the remaining 3 hdd's.

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General :: Add More Drives In Already Installed Linux Operating System/fedora11?

Aug 20, 2009

i have fedora11 installed on my computer as well as windows xp,but now i want to delete all my drives from windows and add those drive to fedora11 because i do not need windows any-more.how can i do that?also i want to increase size of root partition, can i do that?

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OpenSUSE Install :: Get A 64 Bit File System To Read 32 Bit File System Drives?

Feb 2, 2010

Have just assembled a new computer and thought I would install the 64 bit version of openSUSE 11.2 in a "Windows free zone". After a hiccup or two I have managed to get a system of sorts running but on trying to copy files from my old computer(via a memory stick) it tells me that Vfat is an unknown file system.On my old computer I am running 32 bit openSUSE 11.2 as a dual boot system with Windows XP and have no problems moving files between the two different file systems.Is it possible to get a 64 bit file system to read 32 bit file system drives and if so how do I do it?

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General :: Configure RAID 1 On Red Hat Enterprise After Installation Of Operating System?

Jul 12, 2009

How to configure RAID 1 (hardware RAID 1 or Software RAID1 ) after installation of operating system : RED HAT ENTERPRISE LINUX 5.3 SERVER

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Ubuntu :: Converting RAID 1 To RAID 5 System

Jun 12, 2010

I have two 1TB hard drives in a RAID 1 (mirroring) array. I would like to add a third 1TB drive and create a RAID 5 with the 3 drives for a 2TB system. I have ubuntu installed on a separate drive. Is it possible to convert my RAID 1 system to a RAID 5 without losing the data? Is there a better solution?

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General :: Commercial NAS RAID1 Disks Moved To Software Raid System?

Feb 14, 2011

I've got a couple of commercial NAS boxes and I'm wondering if they (ReadyNas duo, DLink DNS-323) or any other NAS is suitable for having their RAIDed disks moved to a software-based NAS. To be specific, I'm a big fan of the (largely) Debian-based Ubuntu. Can the aforementioned NAS drives be migrated to Ubuntu (e.g. using the mdadm Linux command)?

Secondly, is there any commercial NAS that can be migrated over? Incidentally, here is a link to somebody who succeeded in a migration:URL...My specific scenario I'd like to prepare for, is the eventual (sudden) death of one of the NAS motherboards.

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Ubuntu :: Can't Log On In / Any Way To Recover System?

Jan 7, 2011

After a normal shutdown I tried to start my machine but it gets stuck in the login menu and I'm not able to type or move my mouse.When trying to start in the recovery mode, it gets stuck to.Is there any way to recover the system?

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Server :: 2 Separate External Hard Drives With ESata To Minimize An Electrical Failure To The Drives?

Mar 26, 2011

I am building a home server that will host a multitude of files; from mp3s to ebooks to FEA software and files. I don't know if RAID is the right thing for me. This server will have all the files that I have accumulated over the years and if the drive fails than I will be S.O.L. I have seen discussions where someone has RAID 1 setup but they don't have their drives internally (to the case), they bought 2 separate external hard drives with eSata to minimize an electrical failure to the drives. (I guess this is a good idea)I have also read about having one drive then using a second to rsync data every week. I planned on purchasing 2 enterprise hard drives of 500 MB to 1 GB but I don't have any experience with how I should handle my data

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