Red Hat :: LVM Cleanup Process - Two RAID Arrays On Storage

Jan 3, 2010

I am in a situation where I am stuck with a LVM cleanup process. Although I know a lot about AIX LVM , but this is first time I am working with Linux LVM2. Problem is that I created two RAID arrays on storage, which appeared as mpath0 & mpath1 devices (multipath) on RHEL. I created logical volumes and volume groups and every thing was fine till I decided to clean the storage arrays and ran following script:

#!/bin/sh
cat /scripts/numbers | while read numbers
do
lvremove -f /dev/vg$numbers/lv_vg$numbers
vgremove -f vg$numbers
pvremove -f /dev/mapper/mpath$numbersp1
done

Please note that numbers was a file in same directory, having numbers 1 and 2 in separate line. Scripts worked well and i was able to delete definitions properly (however I now think I missed one parted command to remove the partition definition from mpath device. When I created three new arrays, I got devices from mpath2 to mpath5 on linux and then I created vg0 to vg2. By mistake, I ran above script again for cleanup purpose and now I got following error message

Cant remove physical volume /dev/mapper/mpath2p1 of volume group vg0 without ff[/B]

Now after doing mind search, I now realize that I have messed up (particularly because mpath devices did not map in sequence to vg devices and mapping was like mpath2 --- to ---- vg0 and onwards). Now how I can cleanup the lvm definitions? should i go for pvremove -ff flag or investigate further? I am not concerned about data, I just want to cleanup these pv/vg/lv/mpath definations so that lvm can be cleaned up properly and I can start over with new raid arrays from storage?

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Red Hat / Fedora :: Managing Software Raid Arrays?

Jun 10, 2011

With mdadm was only able to add a new drive to the using the --force function. I do not feel comfortable with using the function that way though. When I remove a disk in VMWare, it perfectly says that the drive is lost and the array is degraded (mdadm --detail /dev/md0). Although after re-adding the drive, it immediately shows device as busy for both mdadm and sfdisk when I don't use --force.

Recovery and repairation of degraded array worked fine with sfdisk --force, mdadm --add --force, it automatically started recovering and took not so long. What are best practises to manage software raid-1 arrays?

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Red Hat :: Loading RHEL 6 On Machine With Two RAID Arrays

Apr 15, 2011

Have a customer who is due for a new system. AS they just renewed their RHEL entitlement, they plan on ordering a Dell server without a OS preload. Two questions:

- Will RH let them download RHEL6 just by maintaining the entitlement when their current version is RHEL 3?

- The server will have two RAID arrays - one intended for /home, one for "everything else". As I've never done a clean load with two arrays, how do I select what file systems go on which array?

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Ubuntu :: RAID 5 Setup - Two Separate Arrays Defined

Jan 9, 2011

I'm trying to setup a RAID 5 array of 3x2TB drives and noticed that, besides having a faulty drive listed, I keep getting what looks like two separate arrays defined. I've setup the array using the following :
sudo mdadm --create /dev/md01 --verbose --chunk=64 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sde

So I've defined it as md01, or so I think. However, looking in the Disk Utility the array is listed as md1 (degraded) instead. Sure enough I get :cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md1 : active raid5 sde[3](F) sdc[1] sdb[0]
3907028992 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]

So I tried getting info from mdadm on both md01 and md1 :user@al9000:~$ sudo mdadm --detail /dev/md1
/dev/md1:
Version : 00.90
Creation Time : Sun Jan 9 10:51:21 2011
Raid Level : raid5 ......

Is this normal? I've tried using mdadm to --stop then --remove both arrays and then start from scratch but I end up in the same place. I'm just getting my feet wet with this so perhaps I'm missing some fundamentals here. I think the drive fault is a separate issue, strange since the Disk Utility says the drive is healthy and I'm running the self test now. Perhaps a bad cable is my next check...

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General :: Raid Devices Not Creating Arrays / Solution For This?

Mar 30, 2010

I have created software raid 5 configurations on the second harddrive its working fine and i have edited fstab file for auto mounting when it reboot but when i reboot the computer raid doesn't work i have to re-create the arrays by typing "mdadm --create" command again and mount again manually ,is there anywhere i can do this once without retyping the commands again after rebooting and i am also using redhat 5

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Slackware :: How To Create Raid Arrays With Mkfs.btrfs

Jun 21, 2011

what do I have:2x 150GB drives (sda) on a raid card (raid 1)for the OS (slack 13.37)2x 2TB drives (sdb) on that same raid card (raid 1, too)2x 1.5TB drives (sdc,sdd) directly attached to MoBo2x 750GB drives (sde,sdf) attached to MoBo too.if i got about it the normal way, i'd create softRAID 1 out of the the 1.5TB and the 750GB drives and LVM all the data arrays (2TB+1.5TB+750GB) to get a unified disk.If I use btrfs will I be able to do the same? mean I have read how to create raid arrays with mkfs.btrfs and that some lvm capability is incorporated in the filesystem. but will it understand what I want it to do, if i just say

Code:
mkfs.btrfs /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1
probably not, eh?

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Ubuntu Servers :: RAID Arrays Rebuild The Data On The New Drive?

Jun 5, 2010

I have never preformed a rebuild of an RAID array. I am collecting resources, which details how to build an RAID 5 array when one drive has failed. Does the BIOS on the RAID controller card start to rebuild the data on the new drive once it is installed?

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CentOS 5 :: Remove The Raid 1 Arrays On Server And Use Standalone Drive?

Mar 30, 2010

i want to remove the raid 1 arrays on our server centos and use standalone drive

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CentOS 5 Server :: Best Practises For Managing Software Raid Arrays?

Jun 10, 2011

With mdadm was only able to add a new drive to the using the --force function. I do not feel comfortable with using the function that way though.

When I remove a disk in VMWare, it perfectly says that the drive is lost and the array is degraded (mdadm --detail /dev/md0). Although after re-adding the drive, it immediately shows device as busy for both mdadm and sfdisk when I don't use --force.

Recovery and repairation of degraded array worked fine with sfdisk --force, mdadm --add --force, it automatically started recovering and took not so long.

What are best practises to manage software raid-1 arrays?

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Hardware :: Installing New RAID Card Causes Existing Arrays To Have Bad Magic Number

May 13, 2010

I have two SAS RAID controller cards in a Dell server in slots 2 & 3, both with an array hanging off them. I went to install a third card into slot 1, but then when it boots it says two of my sd's have bad magic number in the super-block and it wants me to create an alternative one, which I don't want to do. If i remove the new card, the server boots perfectly like it did before I added the new card. Is the new card trying to control stuff that isn't hooked up to it because its in slot 1, so its confusing RHEL?

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General :: Scsi RAID Jbod And Arrays - Disk Utilization And The Corresponding Low Data Transfer

Jul 6, 2010

So I have a system that is about 6 years old running Redhat 7.2 that is supporting a very old app that cannot be replaced at the moment. The jbod has 7 Raid1 arrays in it, 6 of which are for database storage and another for the OS storage. We've recently run into some bad slowdowns and drive failures causing nearly a week in downtime. Apparently none of the people involved, including the so-called hardware experts could really shed any light on the matter. Out of curiosity I ran iostat one day for a while and saw numbers similar to below:

[Code]...

Some of these kinda weird me out, especially the disk utilization and the corresponding low data transfer. I'm not a disk IO expert so if there are any gurus out there willing to help explain what it is I'm seeing here. As a side note, the system is back up and running it just runs sluggish and neither the database folks nor the hardware guys can make heads or tails of it. Ive sent them the same graphs from iostat but so far no response.

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Ubuntu Installation :: Dual Boot SSD Non Raid - 1 Terabyte Raid 1 Storage "No Block Device Found"?

Sep 15, 2010

It's been a real battle, but I am getting close.I won't go into all the details of the fight that I have had, but I've almost made it to the finish line. Here is the set up. ASUS Z8PE-D18 mother board 2 CPU, 8 Gig Ram. I recently added an OCZ Agility SSD, defined a raid 1 virtual disk on the 1 terabyte WD HDD drives, which will holds all of my user data, the SSD is for executables.The bios is set to AHCI. Windows 7 installed fine, recognizes the raid VD just fine.

I installed Ubuntu 10.04 by first booting into try and mode, then opening a terminal and issuing a "sudo dmraid -ay" command. Then performing the install. I told it to install the raid components, and told it to let me specify the partitions manually. When setting up the partitions, I told it to use the free space I set aside on the SSD from the Windows 7 install as ext4 and to mount root there. Ubuntu installed just fine, grub2 comes up just fine, and Windows 7 boots with out a hitch, recognizing the mirrored partition as I indicated previously. When I tell grub to boot linux however, it pauses and I get the "no block devices found" message. It will then boot, but it does not recognize the raid array. After Ubuntu starts up I can run "dmraid -ay" and it recognizes the raid array, but shows the two component disks of the raid array as well. It will not allow the component disks to be mounted, but they show up which is annoying. (I can live with that if I have to)

I have fixed a similar problem before by setting up a dmraid script in /etc/initramfs-tools/scripts/local-top ... following the instructions found at the bottom of this blog:[URL].. To recap: My problem is that after grub2 fires up Ubuntu 10.04.1 LTS (Lucid Lynx), it pauses, and I get "no block devices found" It then boots but does not recognize the raid array untill I manually run "dmraid -ay". I've hunted around for what to do but I have not found anything. It may be some timing issue or something, but I am so tired of beating my head against this wall.

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General :: How To Identify Raid Degrade Process / How To Rebuilt Process

Jun 12, 2010

send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.

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Ubuntu :: Get Raid 5 Set Up As Storage?

Mar 14, 2010

I am trying to get raid 5 set up as storage. I have karmic with myth set up on primary drive and wish to just use raid 5 for storage with jfs filesystem.

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General :: Raid 5 Setup (as Storage) In Ubuntu 10

Aug 19, 2010

I have the latest ubuntu V10 and trying to set up a raid 5 to use as storage. I have 3 1 TB drives along with the 160 GB OS drive. Is what I want to do possible and is there a gui interface to perform this or clear instructions on how to accomplish this? I am a novice when it comes to Linux but trying to ween myself off of Microsoft.

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Server :: Network Storage - CIFS / RAID Or ISCSI

Jul 7, 2011

I am interested in turning my home server into something that I can store backups on. I do photography and therefore have a lot of photos. I use Mac OS X for my photo editing, so it must be accessible from my Macbook. I am new when it comes network storage servers, so what would be the best solution for me to be able to backup my photos seamlessly? I would like it easy enough so others can backup files without any terminal commands and such. What would you suggest? CIFS? RAID? iSCSI?

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Fedora Hardware :: RAID - Intel Matrix Storage Manager

Mar 28, 2010

I recently bought a new system that has an Intel Matrix Storage Manager "RAID controller" (ICH10R/DO) on it. I'm a bit baffled over what this really is. I see at [URL] that this controller is supported by the Linux dmraid and mdadm commands and supported in the 2.6 kernel version for quite a while. This looks as though it is some sort of convergence of a brain-dead hardware chipset that requires software installed in the OS to manage it. Kind of reminds me of the wimpy Windows modems of the past. How I deployed. I set up two Seagate ST31500541AS disks as a mirrored pair in the hardware controller interface (CTL-I setup after POST).

I installed Fedora 12 in the usual fashion, though was confusing considering I expected a single "RAID device" to be seen by Anaconda. I went ahead and set up the two native /dev/sda and /dev/sdb as a mirrored RAID device on installation (mdadm under the cover). Recently, Palimpsest is insisting that I have a disk problem with "Disk has many bad sectors" error on /dev/sdb. When I run "dmraid -s" it tells me that the meta device is OK and I see no hardware errors in the messages log. I'm not having kernel panics as others seem to have had on RHEL 5.x.

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Server :: Device Mapper Not Recognizing RAID Storage Luns On RH5?

Feb 26, 2010

Greetings Fellow Knights Of The Penguin Clan....!I am having issues with device mapper seeing a 275GB Raid5 Lun from my SAN storage.I'm using IBM 2145 San Volume Controller.I am able to see a 40 GB Raid 10 device though..

########################################################################
fdisk -l |grep 'dm-*'
Disk /dev/dm-6: 42.9 GB, 42949672960 bytes

[code]....

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Hardware :: Amd SB750 Raid And 12 Install - Unable To Find Any Suitable Storage Devices

Apr 17, 2010

The intention is to have this system dual-boot. When i first put it together, i decided to setup a raid5 array spanning 3 sata drives. I installed Windows 7 first, decided i'd get to Linux later. I left 150mb or so at the beginning of the array for /boot, and about 200gb at the end for my linux install. i'm getting to the linux install. My distro of choice is Fedora 12. I start the setup, and at the point where it's time to partition, the installer tells me that its unable to find any suitable storage devices.

I Crtl-Alt-F2 to a console, and fdisk -l. Fdisk reports three individual drives which all have partitions already. All have free space. None make sense. So i turned to google, and found some threads which explain that this chip doesn't run a true raid, rather its what's been referred to as fake raid. Which is that it depends on the windows driver in order to actually present the array to the OS, and that the best way to get by that on linux, is to break the array, and use LVM instead.

That's all well and good, but i lose two things in doing that. First i lose the resiliency of raid 5, and second, well, what does that do to my windows install? I've considered moving all of my data from windows to other machines, and then just starting from scratch, but i'd really much prefer a method of using the chips fake raid in linux. Is there a driver, or module which i can install to make this happen?

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OpenSUSE Install :: 11.2 On RAID 0 Installation - Process Stop At 1% On Operating With HDD

Feb 27, 2010

I'll have a Sony VAIO AR290 with 2 HDD, earlier I'll have a Windows XP and SUSE and RAID was turned off. Now I turn on RAID in STRIPE mode for better productivity, Windows 7 installation was successful, It creates MBR partition (100 M and C: HDD. During SUSE installation(I've chose all parameters- swap and partition) installation process stop at 1% on "operating with HDD" and my VAIO dont answer on any key pressed (alt ctr del, ctr c, esc) and I'll should to turn it power off. During surfing web, I'll find some solutions to solve it by creating root partition but It hasn't any results.

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Fedora Installation :: 10 - Get To Select The Intel RAID Driver In The Install Process?

Jan 12, 2009

Installing new Intel server S5000VSA (Sapello) motherboard with RAID 1. Downloaded F10 32 bit DVD and run install. Everything works fine and select Samba and all that. Install completes but on reboot get a blank screen.

I know with Windows one has to load the RAID driver off the Intel driver CD, so guess that is the problem. But how do I do this in Fedora? Question: How do I get to select the Intel RAID driver in the install process? There does not seem to be any place to stop and make this selection. I tried selecting the Red Hat and Suze installs on the Intel configuration assistant but it then reboots and that is it. In Windows it would ask to insert the Intel driver CD but that does not happen. So I am stuck. I loaded Fedora some 3 year ago and like it but then it was not on a RAID setup. I created a VMWare install on my desktop and did the same install options and it works. So the DVD seems fine.

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Ubuntu Servers :: Mainboard And Storage System - How Both Storage Devices Will Be Supported By Debian

Mar 11, 2011

I'm interested in buying a new hardware for my company. The old server (now 10 years old) should be replaced with a new one. Till now, I was looking on different hardware suppliers, boards and different other places. I found a Tyan board [URL]. The hardware spec is quite interesting and the board would fullfill our claims.

how both storage devices will be supported by Ubuntu or Debian??

- SATA-Controller: AMD SP5100
- SAS-Controller: LSI 1068E

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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 Installation :: App Cleanup And 10.04 Will Not Boot

Aug 26, 2011

I have installed Ubuntu 10.04 on a Dell Inspiron 1300 laptop. After installing many apps and finding I didn't need some, I did some cleanup. I must've cleaned too much because now Ubuntu won't boot. On boot, I see the Ubuntu logo with the five dots under it. The dots change color as if something is in progress, but it won''t get beyond that. I am relatively new to Ubuntu and I want to stay with it because it's an excellent system. I have worked extensively with Unix in the past but not with a GUI front-end.

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CentOS 5 :: How To Cleanup Root File System

Jan 31, 2010

I have a problem that is probably simple, but have not yet found the answer on any forums or by Googling. First my system specs:Tyan 2610 motherboard w/ 2 x PIII 9334 gig PC133 SDRAM
1 x 5 gig hd (system)4 x 500 gig hds w/ 3Ware 7500 controller set to RAID 5, (1.5 TB) mounted as /homeCentOS 5.3 running my smb and nfs mountsMy problem is that I have run out of space on my / (root) file system, (the 5 gig). Since I am planing to rebuild my file server with larger hard drives, (2 x's 60 gig SATA's set to RAID 1, 6 x's 1.5 TB at RAID 5), within the next 2 months, I would like to try to clean out any unneeded crap rather than adding a hard drive and expanding my root file system. I have done the following:

Removed old unused kernels
cleaned up /var/log/
cleaned up /tmp

[code]....

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Ubuntu :: Lost Boot Option After Windows Cleanup?

Jul 29, 2010

A Microsoft anti virus program (Security Essentials) cleaned out a bunch of problems in Windows XP and now I don't have the double boot option any more. What do I change to get Ubuntu option back? OH, I also had to do a checkpoint restore prior to that but it was after I had installed Ubunto (I think). Which leads me to ask....how do I identify the Ubuntu disk space I allocated at install time? I can't seem to find it.

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Ubuntu :: Sda1 Full, Cleanup Commands Not Working

Oct 25, 2010

I have had the same problem of /dev/sda1 becoming full and have been able to fix it with the commands:

sudo apt-get clean
sudo apt-get autoremove
sudo dpkg --configure -a
sudo apt-get update
sudo apt-get upgrade

But this time I am still unable to free significant space. Here is the output of various commands.

df -h
/dev/sda1 5.6G 5.4G 0 100% /
varrun 498M 108K 498M 1% /var/run
varlock 498M 0 498M 0% /var/lock
udev 498M 76K 498M 1% /dev

[Code].....

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Ubuntu :: Cleanup Script Which Will Clean All Trash Folders

Dec 20, 2010

its basically a cleanup script which will clean all my trash folders..

n run
apt-get clean
apt-get autoclean
apt-get autoremove..

how can i do so?

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Ubuntu Networking :: No Internet Access After Security Cleanup?

May 17, 2011

i installed many security programs as a switching from windows guy and decided to get rid of them last night. I uninstalledgufw, clamav(and all based packages), firestarterusing synapticbefore i rebooted the system the internet was well and working. but after i rebooted i had no internet access;firefox couldn't retrieve, update manager and apt-get couldn't connect.the computer knows it's connected to the router i see the connection established sign but I can't even connect to the router by typing "192.168.2.1".the computer can ping itself(127.0.0.1) but can't ping itself in the network (the dhcp address is 192.168.2.3) and replies "operation denied" or something like that.I rebooted using live-cd and connected with no problems; the my internet connection is fineany thoughts will be appreciated P.S.: I did a fast check on the forums and couldn't find anything related; i didn't check thoroughly though.

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General :: Syslog Format - Cleanup Code Starts

Oct 6, 2009

I am using vsyslog() function in my application to write logs to syslog. I could see the logs in /var/log/syslog as follows.

Oct 6 11:25:23 machine application [4544]: cleanup code starts

What is this number [4544] stands for?

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