I am running single drive Ubuntu server 9.10 with a lot of software. Now I want to add one more disk (same size and type) and to convert this to RAID 0 without need of reinsallation. Is it possible and if yes how? I didn't find nothing for RAID 0. It sounds simple, but probably is not.
View 4 RepliesI kept my movies on a 2 drive software raid1 mirror, but now I changed my mind about needing a raid and pulled one of the drives for another use. Can I convert the remaining raid drive back to a regular single drive and keep the data in place? Can I change the raid partition back to regular partition and be able to mount it?
View 6 Replies View RelatedI am looking to convert a raid 1 server I have to raid 10. It is using software raid, currently I have 3 drives in raid 1. Is it possible to boot into centos rescue, stop the raid 1 array. Then create the raid 10 with 4 drives, 3 of which still has the raid 1 metadata, will mdadm be able to figure it out and resync properly keeping my data? or is there a better way to do it?
View 2 Replies View RelatedHow 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?
View 1 Replies View RelatedHere 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.
I have the H8dmu Supermicro mother board with the MCP55 RAID. CentOS 5 is detecting the four hard drives separately. The operating system resides on a hard drive not defined as a part of the RAID. The RAID was setup as striped.The sata_nv driver is loaded.why the OS would not be seeing the raid as a single drive?
View 2 Replies View RelatedI *had* a server with 6 SATA2 drives with CentOS 5.3 on it (I've upgraded over time from 5.1). I had set up (software) RAID1 on /boot for sda1 and sdb1 with sdc1, sdd1, sde1, and sdf1 as hot backups. I created LVM (over RAID5) for /, /var, and /home. I had a drive fail last year (sda).After a fashion, I was able to get it working again with sda removed. Since I had two hot spares on my RAID5/LVM deal, I never replaced sda. Of course, on reboot, what was sdb became sda, sdc became sdb, etc.So, recently, the new sdc died. The hot spare took over, and I was humming along. A week later (before I had a chance to replace the spares, another died (sdb).Now, I have 3 good drives, my array has degraded, but it's been running (until I just shut it down to tr y.
I now only have one replacement drive (it will take a week or two to get the others).I went to linux rescue from the CentOS 5.2 DVD and changed sda1 to a Linux (as opposed to Linux RAID) partition. I need to change my fstab to look for /dev/sda1 as boot, but I can't even mount sda1 as /boot. What do I need to do next? If I try to reboot without the disk, I get insmod: error inserting '/lib/raid456.ko': -1 File existsAlso, my md1 and md2 fail because there are not enough discs (it says 2/4 failed). I *believe* that this is because sda, sdb, sdc, sdd, and sde WERE the drives on the raid before, and I removed sdb and sdc, but now, I do not have sde (because I only have 4 drives) and sdd is the new drive. Do I need to label these drives and try again? Suggestions? (I suspect I should have done this BEFORE failure).Do I need to rebuild the RAIDs somehow? What about LVM?
I have 4 WD10EARS drives running in a RAID 5 array using MDADM.Yesterday my OS Drive failed. I have replaced this and installed a fresh copy of Ubuntu 11.04 on it. then installed MDADM, and rebooted the machine, hoping that it would automatically rebuild the array.It hasnt, when i look at the array using Disk Utility, it says that the array is not running. If i try to start the array it says :Error assembling array: mdadm exited with exit code 1: mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
mdadm: Not enough devices to start the array.I have tried MDADM --assemble --scan and it gives this output:mdadm: /dev/md0 assembled from 2 drives - not enough to start the array.I know that there are 4 drives present as they are all showing, but it is only using 2 of them.I also ran MDADM -- detail /dev.md0 which gave:
root@warren-P5K-E:~# mdadm --detail /dev/md0
/dev/md0:
Version : 0.90
[code]...
I have a raid 5 array that appears to have died. I was just routinely looking at /var/log/messages and noticed that a drive in the array was complaining (via SMARTD).
This is the /home directory, and so is backed up, so it's not critical, but I'd like to get some things that changed after the last backup (the week before I noticed the failure)
Let me start by outlining what I know :
It's a 2TB array spread over three disks (mdadm software RAID5), here are the drives:
MDADM gives the drives :
Now, the array *WAS* up ok, but I umounted it. (in which /dev/md0 was mounted to /home) Yes,I know - I didn't want any changes being made to the array by anything - at least that was my thinking at the time. In hindsight... I would have killed any processes, locked out the server, backed up again and 'then' unmounted it.
But we are where we are, I'm sure there'll be time for recriminations later.
When I try to remount it, I get :
Ok - looks like it's lost the type - it's normally worked, maybe we'll give it a little hint - it's ext3 with a journal.
When I tell it it's an ext3, I get :
Now, before I go charging off specifying superblocks further along the disk, but I can't remember where they're stored.
Neither can I recall what the blocksize I originally created the array as (I have a feeling I specifed 4K, but I could be wrong).
debugfs is only telling me :
I should also point out that this server is hosted, so it's 150 miles away from me at the moment, so I can't just whip them out and dd a copy.
i have harddrive on which raid 5 is configure and no file system is configured.so i want to access the data on auto raid component harddisk.could any one telme how to access auto raid component hard drive.when im connectingto my laptop its not opening.when i check in disk analyzer its showing auto raid component harddrive.please helpme to access data inside the raid drive.
View 2 Replies View Relatedi want to remove the raid 1 arrays on our server centos and use standalone drive
View 3 Replies View RelatedI'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.
View 1 Replies View RelatedI have question about the UNIX sockets. my goal is to connect multiple sockets from a single client to a single server and keep them open...I'm not sure if that is possible to create or not. Do you have any suggestion or an example of code?
View 1 Replies View RelatedIn my production setup, i have 3 servers using the same mount point. However, i see that the IOPS is low. Does this kind of architecture have any impact on IOPS. In case it is neutral, how can i tune my setup for better IOPS.
View 1 Replies View RelatedI have a requirement of using a wildcard certificate for 5 subdomains running under apache httpd server and 1 subdomain under tomcat.Is there any possibility of using the single wildcard certificate both in tomcat and apache
View 3 Replies View RelatedDoes anybody have any documentation or can assist with any sort of steps on how to install a SSO server on Centos 5.4.We have just over 150 Centos servers country wide and we would like to implement an SSO server to manage the users and their login credentials locally and centrally.
View 1 Replies View RelatedUbuntu does not see any hardware RAIDs on this server - Intel confirms that they do not support Debian distros with this onboard SATA controller.
Tried going with CentOS and OpenSUSE ... CentOS would install, but wouldn't boot. OpenSUSE would work but after multiple installs, Samba wouldn't start.
That left us with Ubuntu Server.
While Ubuntu Server can't see a hardware raid, it can see each of the hard drives individually. From there, I created a software RAID during Ubuntu setup and was able to install.
Initially had some issues with mdadm "losing" the hot-spare ... was able to fix that by adding sd[abc][12] to /etc/mdadm/mdadm.conf ...
It worked fine until I plugged a WD MyBook usb hard drive into the machine.
I lose the hot spare (configured on /dev/sdc) because it mounts the USB hard drive there.
I need to be able to make it mount the USB hard drive AFTER mdadm configures /dev/sdc as the 3rd Hitachi hard drive
What needs to be done to make this work?
I am trying to connect a RAID Box to the server via LSI 8880EM2 RAID controller.The raid box is FUjitsu Externus DX60 with raid 1 configured.The server is Fujitsu Primergy SX300 S5 with LSI 8880EM2 RAID card.The external raid box is being recognised by the raid controllers bios.
The server runs CentOS 5.5 64bit. I have installed the megaraid_sas driver from LSI website and MegaCLI utility but CentOS still fails to see the box.MegaCLI utility, when launched from CentOS, recognises the raid box, CentOS does not(no mapping being created in /dev).
I have also tried to create a logical RAID0 HDD on one physical HDD(as seen by MegaCLI) with MegaCLI utility in CentOS.The result was success and the new logical drive could have been used, but when restarting the server, the controllers' bios fails with an error (not surprised(one logical RAID0 on one physical HDD)) and configuration is being erased.
Has anyone tried connecting 8880EM2 controller to a raid box with raid configured on the box, running it all under CentOS and what were the results.
I have a problem configuring a RAID server under Ubuntu 9.10 (kernel 2.6.31.17) with mdadm (v2.6.7.1). First I had some hardware issues that finally got solved by using another motherboard. Now I am dealing with the software part.In order to ease things, I am trying to configure a RAID 5 with three partitions in one disk. I have two HD's, one IDE where the OS lies (recognized as sda), and another where I intend to build the RAID (recognized as sdb). In this second drive I have made three partitions (sdb1, sdb2 & sdb3) of the same size.I've already re-installed Ubuntu 9.10 a couple of times, zeroed the superblocks of the partitions, repartitioned the disks with different partition sizes (I am using 5 GB partitions to save time). I've gone through this process several times, and I really don't know how to move forward now. If RAID is about trust and reliability, this is exactly what I'm not able to get.
View 5 Replies View RelatedI install 1 of the server build hardware raid 10 with hotspare. now the problem i cant monitor the raid. since it shows as single disk.
So if i need to see any crash disk/failure disk i cant monitor or get logs. can someone advise where to get and how to install the hp smart start for linux or any alternate way available in linux to perform such tasks.
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.
View 6 Replies View Relatedhow can i convert the ubuntu server into gui except gnome,xbuntu,kde enviornment. as they are very heavy. the purpose is basic trouble shooting like network card,internet browser,terminal command line shell prompt,login logout etc.
View 1 Replies View RelatedI have a box that doesn't have a Raid controller or a software raid running currently. I would like to make it a RAID 1. Since it seems there isn't any IDE RAID controllers hardly around, I have another HD that is the exact model as the drive currently in the box running CentOS. Can I some how add the second drive and get the box to mirror from here own out? The box gets really hot and I want to be ready for a HD failure.
View 3 Replies View Relatedi downloaded the centos 5.5 cds in cd version. it has 7 cds. Now i feel, its better if its a single dvd, to install , to update the packages n all.so is it possible to convert the seven cds to one single dvd. i tried unraring the seven cds , combined them and burnt as a DVD, but in vain.so is it possible to do ? any other ways ?? help plz!
View 1 Replies View RelatedMy Pug Server has worked faithfully for many years just sitting in a closet. It is designed wo that you never need to add a monitor or keyboard as it is administered through a web interface. Recently it had a problem with the motherboard and I had to replace it, but the machine is now working. However, it no longer is visible as a network drive on my Windows machine.Unfortunately I have no idea where to start looking to see what the problem is. I did attach a keyboard and monitor and logged on, but everything looks okay (I can see my files, etc.).
This is an old machine (c. 2003), so has an old version of Linux (I have no idea what version, or even how to find out). Since it is never meant to be used directly it doesn't have any GUI installed, so I have to do everything using command line.Does anyone have any suggestions as to how I can even start to determine what the problem is or how I can go about trying to fix it? At this point I would be happy just to get the files out and replace it with a newer NAS.
I have a web application(java 5, mysql server) installed on Tomcat on Red Hat 5.Part of the functionality is to allow the upload of files to a windows share. I have mounted the share using theAny file I create here from the terminal gets sions."-rwxrwxrwx"The problem is that when the application server creates the file it gets created with the following."-rw-r--r--"How can I get files created from the server to be "-rwxrwxrwx"
View 1 Replies View Relatedpls suggest me how to mirroring two hard disk drive in rhel9 server.i can do raid on those hard drive but user requer mirroring.so pls help how could i do this, mirror two hard drive.
View 2 Replies View RelatedI currently have a centos 4.4 I believe running with a 250GB hard drive. I want to make an image of that hard drive. I have tried removing the drive and connecting it to my windows pc using an adapter that would allow my windows machine run the hard drive as it was a regular external hard drive. Of course windows doesn't reconize that drive since it is linux partitioned. I am thinking that I need to have the hard drive inthe box I am wanting to copy and put in a blank drive in the box that I want to copy to. And boot from a live CD and use cat or dd to copy it. I have seen the commands before bust I am thinking this is the only way. Basically I am wanting to have a duplicate of the drive and build a whole new server that is already all setup.I will just change the host name and assign it another Public facing UP. Is this correct? Oh, and the new server will have different hardware. Might even be AMD or intel different from source or destination.
View 12 Replies View RelatedI have a desktop PC running Ubuntu 9.04. It has an AMD Athlon 3000 processor and 2G of RAM with two HDDs, one 450G, the other 110G. All my data on the desktop is backed up on the 2nd disk, together with data from 3 laptops. My plan is to use the desktop as a file and print server for the other machines and in the process free up some work space on my desk as I'll no longer need the screen and keyboard for the desktop.
So, I think, all I have to do is download the 32bit version of Ubuntu 9.10 Server Edition and install it on the desktop. Then I'll be able to access the backed-up data on the 2nd drive, and have an in-house web server as well. I will be able to administer the new server from one of the other machines, hence the free desk space.
Was wondering if it's possible to set up a single disk with btrfs and then later on convert it to a 'mirrored' array?
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