Server :: Setup The Servers In A RAID Configuration?
Apr 15, 2010
I am rebuilding two microsystems servers and I need some advice to make my dreams come true.I want to setup the servers in a RAID configuration and want to install a GUI Linux application to manage a file server, manage a subnet, and host a Moodle on my subnet.I am planning to use Asus eee netbooks running Linux as my client computers. I basically need to be able to get my kids on the web and be able to have them use some open source office suite tools. No major crunching. I'll have two Macs for that.
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Jan 22, 2009
I have had no problem installing Fedora OS on any of my Dell servers prior to this post. Anyway, I wouldn't call this a problem but recently, we bought another DELL server with Quad Core, 4GB, etc... AND this model has 2 swappable SAS Harddrives.
I wouldn't call myself an expert but then again I am not a newbie too. However, I have never setup any RAID before and now I am forced to setup RAID1 on this server. So, in a way, I am a newbie in setting up RAID
Would someone please point me in the right direction as I have no idea what I am supposed to do to setup the RAID. FYI, I will be installing Fedora 10 64bit on this server. I would appreciate if you can start from the very beginning, ie. partitioning, formatting the harddrives during OS installation, etc..
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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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Jul 12, 2010
I'm setting up a web server but I have no experience with RAID. I would like to try this configuration if possible:
2 x HDD 500GB RAID1
1 x HDD 20GB (logs and tmp)
The old 20GB drive I would like to use it to store logs and temporally files (mounted in /var/log and /tmp respectively). With this I'm trying to reduce some disk usage in the RAID drives. In my idea, it would be better to write the access/error logs of the web server in a separated drive to the one serving the files which may increase speed... sounds crazy?
One problem is that during the installation, If I set the RAID automatically it will try to use my 20GB HDD as well in the RAID... Does it will work if I set the RAID first (removing the 20GB HDD) and then set the mount points in it after the installation?
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Oct 6, 2010
Can I use UUIDs to setup a raid with mdadm?
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Apr 4, 2011
I have the current disk setup :
disk1 :
Code:
sda:
(primary) sda1 ntfs
(primary) sda2 ext3 (mounted as / )[code]....
Before i set up the raid, but with this exact partitioning, the system booted perfectly. When i installed mdadm and created the raid1 mirroring on sda6 and sdb1, the init got screwed up, and all i get is a shell on initramfs, from where i can inspect that sda is binded on md, and cat /proc/mdstat tells me that i have an inactive sda[4].I can't mount the root partition (sda2), because it's busy (i suspect dmraid to lock it), which is, i guess, why init cannot be found.
I wonder if my error is to setup a raid array using a logical partition contained in an extended partition (but i hardly see why it would not work - but the sda bind and the sda[4] in mdstat seems to tell me that it does not), or it's just the initrd that is improperly configured. The other things that bothers me, is that changing the partition type of the raid partitions (fd to 0 - Empty), to disable raid autodetection, resulted in the same behavior on boot. Which might lead me again to think about configuration file problem instead of improper setup.The live cd doesn't not seem to recognize raid, so i can't inspect problems any further, but i could inspect system configuration, but i don't really know where to start.
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Sep 19, 2010
I just went out and bought stuff to build a new computer, and among the parts was a Gigabyte ga-890fxa-ud5 motherboard ([URL]). The board has 3 (well, 4, but we'll stick to the 3) main sata interfaces, with 2 slots per interface, allowing 6 sata drives. In slot_0 i put my blu-ray drive, in slot_1 i put my drive that will host the OS and its partitions, and that is in the sata connector pair on the left. The middle sata connector pair (slot_2 and slot_3) i have 2 2tb drives, and in the sata connector pair on the right (slot_4 and slot_5) i have 2 1.5tb drives.
[Code]....
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Jun 7, 2010
I'm looking to set up a bit of a home server, and am wondering about storage. What I'd like is something like RAID 6, which has good redundancy built-in, but with this being a home server, I'd prefer to start a little smaller and leave room to build it up in future. I'd been looking at commercial products like the 'drobo', which seems fairly ideal, but I'd really like to see if I can do it myself. I understand that throwing the RAID into an LVM will allow for some expansion, but the last time I checked, most RAID setups called for the same sized disks, or at least limited the array by the size of the smallest disk present.
What I'd like is the ability to build a basic framework with a few cheap disks, and then as things start filling up, to be able to add larger ones (perhaps eventually pulling out smaller ones as though they'd failed and replacing them with big ones)
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Oct 3, 2010
i installed ubuntu server on a 4-hard disk system, i installed with the RAID 10 support that comes with 10.04 server optioon. my raid swap is /dev/md0 and my raid data partition is /dev/md1
hard drives are /dev/sda /dev/sdb /dev/sdc /dev/sdd
the instalation goes fine, from the 8TB im getting 4TB mirrored which is what i want,
but the instalation setup goes up to the point where it asks me to install grub boot loader, There i choose the default option and it does a fatal error.
my main goal is just to make it bootable, any method is welcome. this went beyond my RAID knowledge (more conceptual than technical)
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Feb 7, 2011
I'm trying to setup RAID 1 on a CentOS 5 server for a zimbra email server.I get a partion schema error. Can I do this?The server is a HP Proliant ML150 G3 server with two 80GB HDD.
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Feb 23, 2011
breaking a software RAID 1 disk array so I can remove one of the drives permanently. I've found a couple suggestions to make the drive 'forget' that it is a RAID drive by "zeroing out their md superblocks", but I don't know enough about superblocks to know if this is destructive or not. I used this guide to create my RAID-1 and it is working fine. This is my current setup:
Code:
$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdb1[1] sda1[0]
149864384 blocks [2/2] [UU]
[code]...
Do I need to boot from a live CD and perform the same commands on an unmounted filesystem?
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Jul 21, 2009
I looking to setup a CentOS server with RAID 5 i was wondering what the best way to set it up and How with the ability to add more HDD to the RAID system later on if needed?
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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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Mar 12, 2009
Is it possible to setup software RAID on a current production server.
If so how would I go about doing so?
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Jul 8, 2010
I'm attempting to install F13 on a server that has a 2-disk RAID setup in the BIOS. When I get to the screen where I select what drive to install on, there are no drives listed. The hard drives were completely formatted before starting the 13 installation. Do I need to put something on them before Fedora will install?
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Jun 1, 2010
I have a new home server I built this weekend with 4 x 320 GB Seagate Barracuda SATA drives. I am going to load my O.S. this week however I don't have a RAID controller so I would like to utilize 'Software RAID' via 'mdadm' package. My question is since this is a general home server with no specific function rather than hold my data reliabily and resonably fast, how do you guys recommend I configure my partitions for RAID? What level would be best with my 4 drive configuration? RAID5 or RAID10? Should I use a 3 drive RAID and use the 4th as a spare? Please let me know what you recommend as I don't have a lot of expertise with what is not practical or useless when it comes to Mdadm RAID.
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Jun 12, 2010
I now have 2 desktops running debian. I have virtual servers running in desktop 1, and I am hosting my photos using Gallery2. I have copied Gallery2 and the mysql over to desktop 2. I have entered port forward to desktop 1 using port 80 (using my router), and desktop 2 using port 1000. I can only access Gallery2 in desktop1. If I tried to access Gallery2 in desktop 2, I got re-directed to desktop1.
Questions:
1. Are home routers capable of port forward to more than one computers in a home network behind the firewall of the router? It is Belkin N+ router.
2. Can multiple virtual servers be setup in 2 desktops?
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Jun 27, 2010
I need to setup an linux cluster ..so i prefer ubuntu because of support and i personally i use ubuntu.. and can any one explain in breif ..what all the things needed to setup an ubuntu based cluster my configuration for each node will be (totally 6 nodes) core2 duo with 4 gb ram i need 4 nodes and 2 for load balancing..
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Sep 1, 2011
I'm having problems with emails containing HTML content. When Google downloads the email messages via POP3 from my squirrelmail server, the message does not display using HTML. I'm not sure if this is Google's fault or Squirrelmail's fault, but I've never had problems before on other servers running the same script and using squirrelmail. If I login to squirrelmail, I have the option to download the email message as an attachment. The attachment, if opened by my local browser, shows up as HTML content, and it is properly formatted. However, I'm using Google to download my emails and file them under my Gmail account. After Gmail downloads the messages, it shows up like this:
From
To admin@domainRemoved.com
Date Sat, Jul 30, 2011 at 6:07 PM
Subject Pending Registration
Content-type: text/html; charset=iso-8859-1
From: Name Removed <admin@domainRemoved.com>
Message-Id: <20110730234302.6B6FEDC08BA@eric-desktop>
Date: Sat, 30 Jul 2011 17:43:02 -0600 (MDT)
<p><b> After registering your client via your server, please visit the following URL to send them confirmation: </b></p>
I really need it to show up properly once Gmail downloads the messages, as it takes a long time to login to Squirrel mail and download each message as an attachment. My PHP Code Headers Look like this:
$headers = 'MIME-Version: 1.0' . " ";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . " ";
$headers .= "From: $uname <$email>";
Someone suggested that I remove the from my script. I did, and now the email shows a from sender as www-data www-data@domain.com. Before, the from field showed up as empty. However, my PHP script is designed to change the sender's information to the clients that contact me. Thus, if customer A contacts me, the email should be from customer A <custa@whatever.com>. However, it's not being changed by the PHP script. It works on every other server but mine. I think my postfix configuration isn't setup properly? What needs to be configured on it?
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Oct 26, 2010
I have created a filesystem /data using software RAID-1 concept using two disks.
/dev/sdb - 50 GB
/dev/sdc - 50 GB
now i have to increase the /data to 100GB by adding two more disk.
/dev/sdd - 50GB
/dev/sde - 50GB
is this possible, if yes
how exactly i can increase the existing RAID-1 array from 50GB to 100GB.
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Nov 3, 2010
This is a strange problem. I have Ubuntu server installed on a proper server hardware. My RAID card reports all four HDDs to ubuntu as single drives, which is how i set it up because Ubuntu does not recognize the raid card on the server. Now you might say if thats the case, why dont i remove the raid card and have the BIOS report to ubuntu as four single drives then i can perhaps setup software raid. Well my board has only one sata port.Ubuntu is all setup. on the first drive and i have set the other three up using software RAID.
System works great only problem is it freezes sometimes. Not everytime, just on the odd occassion I use the same Hardware without the raid card and of course just one HDD and it great. No freezes.That leads me to believe its the RAID card.My question is why will it run great for days and sometimes just freeze on me? Probably silly but if theres an issue with the RAID card, it should not work at all, should it?
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Jun 23, 2011
I'm looking to set up a server with attached mass storage device and tape autoloader to run linux. It's set up under Windows at the moment. Goal is to have users, connecting from individual workstations and laptops, backup their data to the linux server. On their personal machine, some users run linux, some MacOS, some Windows. I plan to set up the 5 500 GB drives as RAID5. I understand that if setting up as software raid the format is "physical volume for RAID". Under this setup, will Windows users be able to read/write and function as expected? I can't assume only linux user access.
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Jan 4, 2010
If you hadn't guessed it from my last 3000(ish) java-related posts, I'm a Java n00b writing a Java Applet for a work project. I got to the part was I was about to write the applet code that would send HTTP requests to my CGI scripts. But I read some paragraphs in a book praising Java servlets as better that CGI because they are easier to use and give much better performance server side. My server load isn't very big, though, and I was wondering if it would be worth taking the time to learn about Java servlets and how to set up the server side configuration on my Fedora web server.
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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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Jul 6, 2011
I've been running my dedicated server on Ubuntu 10.04 for 300 days non-stop so far (touch wood). I'm planning to purchase a dedicated server to host many large sites. The specs are Sandybridge Xeon with 16 bay x 2TB storage using RAID5 (Adaptec RAID 51645).I don't have experience with RAID, but I read that ext4 can only support filesystem up to 16TB, my plan for the system is to have 32TB of storage. How can I make Ubuntu run this configuration?
Also, can Ubuntu 10.04 recognize the Adaptec card? Going through Adaptec website there is no mention of drivers for Ubuntu (although many other distros are available).
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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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Aug 30, 2010
We have configured software based RAID5 with LVM on our RHEL5 servers. Please let us know if its good to configure software RAID on live environment servers. What can be the disadvantages of software RAID against hardware RAID.
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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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May 27, 2010
I'm trying to setup a cronjob that needs to run every 40 minutes between 10am and 3.30pm.I generally used cronjob for simple configuration, but now I'm a bit lost.There is a way to setup cronjob for that configuration? (better if all in one line of code, not multilines).
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Apr 22, 2010
Ran 'do-release-upgrade -d'on my server running Hardy.No problems during the upgrade.Rebooted after the upgrade completed, and I was presented with the new plymouth screen. This sucks for servers.It sat there displaying the logo for ~5 minutes.Hit CTRL+ALT+F1 through F8 and didn't see anything on the virtual consoles.Finally figured out that I had to hit ESC on the plymouth screen to actually see what was going on.It said /dev/sdi1 had problems along with /dev/md0.It sat there forever with no fsck status and no HDD lights blinking.
SysRq+REISUB and tweaked the boot parameter to remove 'quiet splash' and appended 'S' for single-user mode.Got the attached screenshot.The box has been sitting like this for ~15 minutes.Not entirely sure what to report a bug against at the moment. Plus the somewhat-new requirement of running 'ubuntu-bug' is pretty retarded in this situation. (Yeah, I know I can add some string to the URL to get around it.Why is it such a pain in the *** to report a bug?)I'm going to do some more digging to try and find out what is dying during boot.The new boot process is a bit of a mystery to me still, so if anyone has pointers or any devs want more detailed information,
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