Hardware :: RAID 1 Mirroring Setup For Home Environment
Jul 21, 2010
I planned to setup raid 1 mirroring for my small home environment. Then I selected two new harddisk and connected to my system. I inserted my fedora dvd and I clicked raid button in the graphical installation process by refering redhat docs. I installed successfully in /dev/sda /dev/sdb it works fine. For testing purpose I removed one harddisk /dev/sda. My system didnt boot it shows grub error. Why this happened? Since I have configured raid mirroring why the system is not booting from second harddisk /dev/sdb.
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May 2, 2010
I am attempting to set up a firewall in my home network environment. the rest of the environment is windows, sorry I am attempting now so bear with me. what I have is a cable modem coming in, then my fedora 11 box with 2 nics, then the wireless router and the rest of the network.
everything works fine until I put the linux box in. If I put the firwall in the firewall sees the internet but the wireless router directly after does not. I am doing something wrong with the dhcp I am guessing. I dont want the firewall to give the address to the network I want the router to. I tried to get the firewall to do it (yum install dhcp leafnode) but it kept saying something didn't work right.
so I figure I will let the cable modem give the firewall an ip and the router give the rest of the network their ip's but how do I get the firewall and router to see each other and allow passthrough?
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Sep 2, 2010
I've set up a test machine with Ubuntu 10.04. It has two drives making one RAID 1 drive using mdadm. This RAID drive is where /home is mounted. I like to break things just to see what happens and to know what to do to resolve it before it happens for real. So I physically removed one of the drives that made up the RAID 1 (while it was off).
I then rebooted the machine. I thought since it was mirrored then /home would mount correctly using the other mirror. What actually happened was on the Ubuntu splash screen it said there was a problem mounting /home. I skipped the mounting, logged in and looked in /proc/mdstat. It reported one drive that was inactive it did not report the missing drive.
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Jan 5, 2011
I am using Ubuntu 10.10. I have a system set up with 1tb HD. I also have another 1tb HD which I'd like to use to mirror the other drive. So if the primary HD fails I can boot and operate from the mirrored drive. I've read that this is possible by using Raid. however I am confused if it is possible to set-up with a HD which is already set-up Ubuntu system. Also what what I can make out the mother board does not have a raid option.
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Mar 19, 2011
I just tried creating a raid Device which has both stripping and mirroring i have done as below Quote:
mdadm -C /dev/md00 -l1 -n2 /dev/sda7 /dev/sda8
mdadm -C /dev/md01 -l1 -n2 /dev/sda9 /dev/sda10
mdadm -C /dev/md02 -l0 -n2 /dev/md00 /dev/md01
pvcreate /dev/md02
vgcreate volgroup02 /dev/md02
lvcreate -n orac -L 9G volgroup02
[Code]...
Everything is fine until here but after reboot the device wont mount on /orac it says special device not available i found that that md02 device is not in active state
i tried deleting it and recreating it but no use still it wont persist a reboot
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Nov 10, 2009
Have been tasked with a couple of Sunfire X2100 that I am slapping Fedora 11 onto for some high profile tasks around the office. Have two drives of the same size in each server and would like to have the two disks mirrored for redundancy. Admittedly I am new at Linux administration and am feeling over my head.
1. Can this be managed during the installation process of Fedora 11?
2. If yes, let me know the step by step please.
3. If no, I take it a cron job of rsync is going to be my best option.
4. Alternatives insights etc.
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Dec 15, 2010
So I didn't notice when I setup my CentOS 5.5 server that I left / as RAID 0 on md1. All the rest are RAID 1. Is there a way I can modify the array to RAID 1 without a risk of data loss? I'm glad I caught this before I setup any other services. I've only setup smb so far...
[root@ftpserver ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md1 16G 3.0G 13G 20% /
[code]....
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Jun 4, 2010
I've been all afternoon trying to install Ubuntu Lucid on my fakeRAID 0 configured (2) HDDs and am unable to set GRUB up. The fake RAID setup is provided by Intel Matrix Storage Manager, it is correctly enabled and the BIOS is also correctly set up -- in fact, I've managed to install Windows 7 with no significant hitch. After struggling with partioning the drives (had to follow advice I found on a very helpful guide online [0]), creating the filesystems AND getting Ubuntu's installer to actually do what it is supposed to do, I now cannot seem to set GRUB up. My system, as it stands, is unbootable at all; via live CD only.
This is how the RAID0 dev is partitioned:
Code:
# fdisk -l /dev/mapper/isw_ecdeiihbfi_Volume0
Disk /dev/mapper/isw_ecdeiihbfi_Volume0: 1000.2 GB, 1000210694144 bytes
255 heads, 63 sectors/track, 121602 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x6634b2b5 .....
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Apr 17, 2011
I'm looking for the place where $HOME environment variable set. It is after login, to my mind.
I'm using Linux debian 2.6.32-5-686.
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Jun 22, 2011
I have 1 Desktop and 4 laptops...All the machines are a mix of Linux and Windows OS...The Desktop has only one OS - Windows XP - Pro..
The printer is a HP Deskjet connecting thru USB to the Desktop
The Desktop is connected thru ethernet cable and all the Desktops are connected Wirelessly to Internet..
I want to use the Desktop as a Hub for my Music files as I have too many and cant spend time copying from one machine to another...I also want to print directly from the laptop by sharing the printer.
There is a locational problem in the sense ,The Desktop is in the ground floor of my house...I have the laptops in 1st and 2nd floors..So at night time I cannot be running up and down to turn on / off the Desktop.
I installed VNS tight viewer which allows me to control the remote desktop from my laptops...It is beautiful in the sense at night I can switch off the desktop from first or 2 floor after the work is done.
But I guess you cant pull files from remote desktop as it seems like a chrooted environment... Even If I try to play any file it would be from my Desktop and not laptop....
So how do I go abt it ? ---Samba for share and VNC for physical control --(on/off)?
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Sep 1, 2011
I've used Ubuntu 4 years ago now I'm installing a new version. How do I get the X Window environment setup, instead of Windows environment that I'm seeing ?. I need something like KDE and XTerm.
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Feb 12, 2010
I'm trying to setup a PXE boot environment.Now the diskless machine reads in vmlinuz and initrd.lz from the /tftpboot directory of the dhcp server machine (host name: antilop, runing slackware 11.0).There is a NFS export named /usr/data/ubuntu on antilop (which can be mounted from the client when runing mandriva mcnlive Toronto)When I'm trying to boot with PXE, the kernel and initrd starts, eth0 gets a valid ip address.Then a lot of error messages appear saying: NFS over TCP not available from 192.168.1.48 <- this is antilop, my DHCP server and NFS server too.
Here is the content of the /tftpboot directory:
-rw-r--r-- 1 root root 34 2010-02-11 20:49 boot.txt
-rwxr--r-- 1 tjp users 75564 2009-10-05 16:08 gpxelinux.0*
-r--r--r-- 1 root root 5755032 2009-10-28 00:00 initrd.lz
drwxr-xr-x 2 root root 2592 2010-02-12 12:59 pxelinux.cfg/
-r--r--r-- 1 root root 3890400 2009-10-16 00:00 vmlinuz
Here is the contents of my /pxelinux.cfg/default:
default aaaa
label aaaa
kernel vmlinuz
append boot=casper netboot=nfs nfsroot=192.168.1.48:/usr/data/ubuntu initrd=initrd.lz
There is no process listening on tcp port 2049 (on antilop)I asked my friend google but it didn't give a satisfying answer so far.Some said that no nfs-over-tcp exists on slackware, some said nfs clients trying over tcp must fallback to udp.
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Feb 21, 2010
I have been looking around the web and forums for a while for the best way to set up a development office. I havent really found many specifics. I am with a new company is just starting to really take their development services seriously. We've added a couple developers and designers in the last month. I am trying to figure out a the best way to set up our environment.
We have a couple dedicated virtual servers with Media Temple. Currently, we develop everything under a subdomain of a domain we set up for development. When the site is ready to go live we move the site to its own domain. I cant believe this is the best way to go about things. So, what do you guys suggest as a setup? Software, versioning, etc. We have the ability to setup a test server in house and then push out changes to the production server but not really sure if that is needed.
We do mainly Wordpress development. If this should be posted in another area,
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Mar 11, 2010
I have setup samba and shared /var/www/html on a shared folder so that i can access the folder directly via my IDE, however i cannor write file in there, is there any better way of doing it ?
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Jun 15, 2010
I can setup variables in ~/.bashrc for my own shells. I can also setup variables globally in /etc/bashrc.but then how do I setup variables for a group in Linux? So that users who belong to this group will see the variables, but not others?
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Mar 23, 2010
i need to setup a demo desktop environment for ppl to try out a java based gui. i need to put this demo on a VPS server, run a vncserver, and use a web-based vnc viewer for ppl to access to it. what is the best desktop environment for this case, 1. my vps server only has about 200m memory left 2. i need to have java swing set running 3.it doesn't have to be cool, but it needs to be quick. i heard that freeNX is quicker, but i doubt there will be a web-based viewer around. i tried both gnome and xfce4 on my virtual machine and vnc to it, strangely i found out gnome is somehow faster than xfce4 which is supposed to be otherwise.
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Jan 8, 2011
I edited /etc/profile to look like:
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).
if [ "`id -u`" -eq 0 ]; then
[code]....
When i type env, it just shows: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin It also shows JAVA_HOME, CLASSPATH and others were set up. Trying to get updatetool in glassfish usable for any user and during any session. I did the export command in a shell, and it worked, but not after closing the session. how to do environment variables.
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May 27, 2011
Before setting up a dedicated web- and mail-server system, I want to learn it by setting both up on my desktop environment. So far I can only find how-to's which are based on server install iso's.
Is it wise first to install a mail server by using i.e. [URL]. Get it up and running and then install a lamp server using [URL]
Both servers must use my own IP address which is related to my own domain xxxxx.com I also need to understand how to incorporated these.
My desktop is Ubuntu 11.04 2.6.38-8-generic x86_64.
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Jun 4, 2010
OS: Centos 5.5_x86
I've searched quite a bit for how to set up Java environment variables with the newest java JDK. I installed java using the following commands:
yum groupinstall "java development" (I need it for the application I am trying to run)
yum install "java"
I have them both installed however I can't seem to get java to function. The application I am trying to run requires that I set java environment variables any solutions?
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Jun 14, 2011
i installed my desktop environment from synaptic manager! so when i restarted my computer i couldn't log into the desktop environment. How can i recover from this? Also,how can i access my home folder from a live cd?
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May 6, 2010
i have added a tomcat startup service using chkconfig. I have set up JAVA_HOME and JRE_HOME as well ass alternatives to point to the correct location.I have an init script in /etc/init.d. When i start the tomcat service using [ /etc/init.d/<x> start ] everything works fine and the environment variables for JAVA_HOME and JRE_HOME are used correctly.Now i added the service <x> using chkconfig --add so that it can start on boot up. But now the service does not use the system environment variable for JAVA and JRE setup by me.Also after complete bootup if i try to start the service using [ service <x> start] the environment variable in the shell are not used. don't want to exclusively declare variables for JAVA_HOME and JRE_HOME in the init script.
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Nov 24, 2010
how to to setup a PXE boot environment. The server contains a LUbuntu 10.10-installation the client is Ubuntu 10.10 Server (I didn't mix up those two...) So, everything is going fine; the client gets an ip-adres, and boots over PXE. The login-prompt is shown. Problem: I can't login. It seems my users are deleted (better not copied). Of course the system (client) works fine when I boot the system from it's harddrive. The only thing I can guess, there going something wrong with:
[Code]....
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Feb 11, 2010
My problem is that I can't setup a diskless environment with CentOS 5.4 (server) and CentOS 3.9 (hosts). On the host, I've recompiled the CentOS 3.9 kernel, with these mods:
- added kernel level IP autoconfiguration;
- added NFS file system support;
- added Root file system on NFS;
- added e1000 driver (the host has a gigabit network card);
Then, I have followed the guide at this link: [URL]
But in my dhcpd.conf I'he put other parameters:
ddns-update-style interim;
allow bootp;
allow booting;
subnet 192.168.195.0 netmask 255.255.255.0 {
range192.168.195.70 192.168.195.90;
option routers192.168.195.254;
option subnet-mask255.255.255.0;
option domain-name"lnf.infn.it";
option domain-name-servers192.168.195.254;
option time-offset-18000; # Eastern Standard Time
default-lease-time21600;
max-lease-time43200;
filename"linux-install/pxelinux.0";
next-server192.168.195.254;
}
host dante79 {
option host-name"dante79";
hardware ethernet00:20:38:01:C3:7C;
fixed-address192.168.195.79;
}
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Dec 7, 2010
I have two computers on my home lan I am trying to share files between...My desktop which is running Ubuntu Server 10.10 (x64) with a GUI, and my laptop which is running Ubuntu Desktop 10.04. I have tried a million different tutorials regarding SAMBA setup, but they never work.
In addition, most of those tutorials are geared towards hybrid Linux/Windows environment. I do not have any microsoft product in my home. I have created the share on my server, but I'm not sure how to connect to it from the laptop (once again at this point in the tutorials it explains how to access it from a Windows PC). I tried using the menu doing this:
Places-->Connect To Server-->Service Type-->Windows Share (for the server I tried my server hostname and IP) to no avail. Does anyone know of a recent step by step tutorial for setting up a complete Ubuntu environment? Is there a simpler method I can use since I do not particularly need to use SMB protocol?
All I want to do is share my music folder from my server so I can access it (from the same LAN) on my laptop...Arrrghhh frustrating.
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Feb 13, 2011
I was trying to setup a cross-platform development environment with qt, an thus looked for the qt-sdk package I used to install on my 32-bit machine.This package appears to have been deleted from 64-bit ubuntu maverick, but I do not understand the details...
- Has this package been renamed, or is there another one in place of it?
- Is this package going to be available again in the future?
PS: I am aware that one can install the sdk by downloading the installer, but for unattended install I prefer the apt package...
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Aug 2, 2011
I install ubuntu server 11.04 I select ubuntu server from boot menu then enter username and password and then i see a command line line and a black background How i can setup a graphical app (some thing like genome) for my server I do not know any thing Any body can explain all step of this for me how I connect to internet how download graphical app and install it? (I connect to web with windows 7 and adsl internet)
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Mar 24, 2010
I have a server set up with Ubuntu Karmic. I am making it a printer server, and my printer is compatible with Ubuntu. (I tested it on my laptop, also using ubuntu) My problem is, the driver installer is graphical and my server is not. Is there a way I can just run the installer in server WITHOUT installing gdm or a desktop environment? So far, everyone I've read says to have xserver,xorg,fluxbox(or other gui), etc. I just want to run the installer through SSH, and I know about the -X tag.
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Jul 6, 2011
I'm looking at building a small NAS setup for my home to hold all my media (DVD's, pictures, music etc..). I'm not too concerned with backups of it at this point as I have all the data elsewhere as it is, but would like one central spot to access it.
A friend of mine turned me on to Ubuntu to do this with but he's never tried it, so I'm looking to see if anyone else has done this or if there issues with it. I've used linux off and on for several years, but this would be my first Ubuntu install.
I'm looking at either using some older hardware I have sitting around, or something cheap like a small dell server (T310 or something). I'd get 4 2TB drives and just use them in a software raid 5 array. It would be accessed with a few different samba shares I'm thinking.
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Dec 2, 2009
I have 2 drives and wish to use the following partition setup.
sda1 /boot 1GB ext4
sda2 / 50GB ext4 raid 0
sdb1 / 50GB ext4 raid 0
Unfortunately only Ubuntu server has the option to make a raid in the install. Can somebody point me to a howto on something like this up. I'm thinking I will want to install onto a sdb2 set up the raid and copy the file system to the raid.
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Apr 25, 2010
I have set up a RAID1 array and am trying to test if its is set up correctly/if errors are detected, reported and recoverable.
Started up the mdadm monitor with:
Code:
I set the RAID array to a faulty state by doing:
Code:
However I do not get any problem reports to my e-mail address. When I test the mdadm I get this result:
Code:
When I look in the postfix folder, sure enough.. there is no main.cf file there... but there IS a file named 'master.cf'. I am running Ubunto 9.10 with default components - have postfix but no sendmail.
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