Server :: Create Nested Raid In Centos?
Jan 21, 2010We can create normal raid levels in centos using mdadm, but how can we create nested raid levels ( example raid 1+0 Raid 0+1).
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CentOS 5 Server :: Possible To Create RAID SW On Working System
Oct 5, 2009I'm working in a little company and 2 weeks ago one of our server had a hard disk failure (yes it was a seagate 11) and after passed two days without sleep trying to recover everything (and we did it!!) we took the decision now to use in some of our server a raid sw, so if one HD fail we can continue with our system without losing nothing. Yes I know normally you have to take all the precautions before so this things never happen, but you know I thing if it never arrives you, you always think than you're lucky and it's never going to happen to you but one day you discover reality.
So now this server is working with a Centos and the default HD partitions one boot partition and the LVM. I'm reading everything I'm finding about raid sw and lvm but I don't find if it's possible to create now with the system working a raid sw without having to reinstall all the system. Is it possible to do it ? If not what are my options to make a system backup before reinstalling everything?
CentOS 5 Hardware :: Connect A RAID Box To The Server Via LSI 8880EM2 RAID Controller
Aug 3, 2010I 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.
Ubuntu Servers :: RAID-5 Recovery (spare/active) / Degraded And Can't Create Raid ,auto Stop Raid [md1]?
Feb 1, 2011Could 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.
CentOS 5 :: Raid 1 - Need To Create Array On Every Restart
Mar 10, 2010I have a raid 1 array which I did setup on a Centos box. I can configure the array fine the problem is every time is restart my machine I can no longer see the array and have to go create it all over again. I tried doing a few searches on it but have came up with nothing so far.
View 19 Replies View RelatedServer :: Mdadm Create,, Raid Array Is Not Clean?
Nov 16, 2009mdadm --create /dev/md1 --level=1 --raid-disks=2 missing /dev/sdb1and I getmd1: raid array is not clean -- starting background reconstructionWhy is it not clean?Should I be worried?The HD is not new it has been used in before in a raid array but has beenrepartitionated.
View 2 Replies View RelatedUbuntu Installation :: Create File Server - Install Hardware Raid Controller
Jun 18, 2010I want to create a file-server with Ubuntu and have two additional hard drives in a RAID 1 setup. Current Hardware: I purchased a RAID controller from [URL]... (Rosewill RC-201). I took an old machine with a 750GB hard drive (installed Ubuntu on this drive). I installed the Rosewill RAID card via PCI port. Connected two 1TB hard drives to the Rosewill raid card. Went into the RAID bios and configured it to RAID 1.
My Problem: When I boot into Ubuntu and go to the hard drive utility (I think that's what its called). I see the RAID controller present with two hard drives configured separately. I format and tried varies partition combination and at the end of the day I see two separate hard drives. Just for giggles, I also tried RAID 0 to see if they would combine the drives.
Server :: Setup RAID 1 On CentOS 5 Server For A Zimbra Email Server
Feb 7, 2011I'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 RelatedHardware :: RAID - Create RAID 1 Without Deleting Data?
Jul 18, 2009how can I create RAID 1+0 using two drives (one is with data and second one is new). Is it possible to synchronize data drive with empty drive and create RAID 1+0 ?
View 3 Replies View RelatedServer :: CentOS 5.3 - How To Configure RAID 1
Dec 28, 2010I have centos 5.3. I have two h/d 1st h/d used as primary and backup of reqd things of first h/d is copied into 2nd h/d. I want to configure mirroring in this server how to configure this, raid 1 is ok or not.
View 1 Replies View RelatedCentOS 5 :: Setup A Server With RAID 5?
Jul 21, 2009I 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?
View 1 Replies View RelatedServer :: Create A "slow To Update" Raid - To Keep Spindle On Second Disk Spun Down?
May 5, 2011I have a small SDD system disk and a large data disk on a server based on fedora core. It is organized this way so that the data disk can be spun down most of the time, reducing noise and heat.I'd like some way to periodically create a bootable backup of the system disk on the data disk, so that if the SDD goes belly-up, I lose minimal data and can very quickly bring the system up.Some thoughts:1. I know I can create a partition on the large disk and make the system boot from a raid0 mirror.However, the constant writes to the system disk (e.g. by the journal daemon) will ensure it never spins down.2. I can do a periodic format and cp -ax to the "copy of system" partition, but that doesn't leave the disk bootable because it needs changes to the /etc/fstab, and possibly a mkinitrd to become bootable.3. Or something like boot from a TFS (translucent filesystem) where base layer would be the raid, and the writable layer would be on the SDD, with periodic pushes of the writable part to the base layer (I'm not sure this is even possible).
4. In a virtual world this could be managed by appropriate location and use of snapshot images, but I'm not in a virtual world - as far as I know :0).Ideally I'd like something like raid that only brought the copy of system disk into sync with the running system infrequently (perhaps every few hours). Can anybody suggest how to do this?
CentOS 5 :: Setup Software RAID On A Current Production Server?
Mar 12, 2009Is it possible to setup software RAID on a current production server.
If so how would I go about doing so?
CentOS 5 Hardware :: Mounting RAID Array On Samba Server?
Jun 23, 2009I need to mount my raid array on CentOS 5.2 samba server.
Here are my hardware specs:
Motherboard: Tyan S2510 LE dual PIII
CPU's: Intel PIII 850ghz socket 370
Memory: 4 gig Crucial 133 ECC SDRAM
OS: 2 x'x IBM Travelstar 6.4 gig 2.5 hard drives, (low heat/noise)
Storage: 4 x's Seagate 500 gig IDE 7200 rpm
RAID controller: 3Ware 7500-12 controller, (RAID 5) (66 mhz PCI bus)
NIC: 3COM 3C996B-T gigabit NIC, (66 mhz PCI bus)
I have the 2 IBM's set as RAID 1, (mirror) and the 4 Seagates as RAID 5, (1.5 TB) I have installed the OS with minor problems, (motherboard doesn't like the 2.6.18-128.1.14.el5 kernel, removed it from my grub.conf).
My problem is mounting the RAID array. I have done the following:
formatted with fdisk;
fdisk /dev/sdb
Then formatted with the following command;
mkfs.ext3 -m 0 /dev/sdb
The hard drive was formatted with the ext3 files system, but I have mounted it as an ext2 file system as I don't want 'journaling' to occur. I then edited my /ect/fstab like this: .....
Then: mount -a
When I go into my "home" directory and type ls, I get the following:
[root@hydra home]# ls -l
total 24
drwx------ 2 zog zog 4096 Jun 23 15:50 zog
lrwxrwxrwx 1 root root 6 Jun 23 15:46 home -> /home/
drwxrwxrwx 2 root root 16384 Jun 23 15:34 lost+found
drwxr-xr-x 2 root root 4096 Jun 23 17:18 tmp
Why my home directory is showing under home?
CentOS 5 Server :: Random Auto Rebuild Of Software Raid ?
Jan 16, 2010I have set up a software raid 5 and a software raid 1 on the same 3 disks.
But my problem is, every couple of days the software raid starts automatically resyncing. This resync is always succesful.
I do not know why this happens, any ideas to troubleshoot this further? I can not see an error in /var/log/messages
CentOS 5 :: Remove The Raid 1 Arrays On Server And Use Standalone Drive?
Mar 30, 2010i want to remove the raid 1 arrays on our server centos and use standalone drive
View 3 Replies View RelatedCentOS 5 Server :: Soft-Raid Didn't Start After Boot?
Apr 22, 2010I've a database-server (IBM x3650 M2) with about 3 TB Data on SAN (Hitachi) with lvm top of softraid (RAID1) based on multipath (2 SAN-boxes in different buildings). After booting the server, multipath starts, but no md starts the mirror. The same configuration with SLES 10 works.
cat /proc/mdstat
Personalities : [raid1]
md13 : active raid1 dm-17[1] dm-14[0]
[code]....
CentOS 5 Server :: Remove/Disable Software Raid Without Formatting?
Nov 8, 2010I am currently running CentOS 5.5 on a software raid 1 setup.
I would like to remove the raid configuration and have it run without raid.
How would one go ahead and do this?
CentOS 5 Server :: Best Practises For Managing Software Raid Arrays?
Jun 10, 2011With 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?
CentOS 5 Hardware :: Setting Up RAID On Compaq Proliant DL580 G1 Server?
Aug 1, 2009how to setup RAID on a Compaq Proliant DL580 G1 Server. Currently there is no OS installed. I used the SmartStart CD but there is no option to setup RAID. When I put in the boot CD for CentOS 5 it recognizes individual hard drives not a RAID Setup.
View 4 Replies View RelatedCentOS 5 Hardware :: Install A RAID 1 On A Dell Power Edge Server?
Feb 10, 2010I am trying to get a understanding of how to install a RAID 1 on a Dell Power Edge server.
HARDWARE:
2 - 16gig SCSI dives
1 - 36gig SCSI drive
I have read through some documentation found online and at centos.org but still having problems.
get this accomplished keeping in mind this is my first go at using RAID system.
CentOS 5 Server :: Cannot Create Groups In Directory Server?
Feb 25, 2010I have a centos 5.4 64-bit machine. I installed the directory server following those steps.
I then added some users using the Centos Management Consolecentos-idm-console -a http://localhost:3890 &
Server :: Create A,NS And MX Record In CentOs
Apr 11, 2011I would like to know how to create a A,NS and MX record in centos.
I dont know where the DNS zone file is in CentoS
CentOS 5 Server :: How To Create Some PHP Extensions
Jun 16, 2009I'm trying to create some PHP extensions. I have installed php-devel as well as the other preqs I thought were required. However I'm not able to find ext_skel. The file README.EXT_SKEL was installed, but not the actual program (find / -name ext_skel). My understanding was ext_skel was installed with php-devel. I know it is in the source code, but I'm not sure where to get the source for PHP 5.1.6 for my version of CentOS.
I'm running linux 5.3
2.6.18-128.1.10.el5
i386
CentOS 5 :: How To Create A Personal Server
Jan 5, 2011I would like to create a customized CentOS server, or it will serve me as a server (postfis) postfixadmin, Hylafax, webmail (Roundcube for example) and may be I would integrate suger crm.
If I create it all this server and it runs perfectly. my goal is I create a compilation or for example I install this distrubution and wonder just some configuration (eg IP address or the time just) knowing that by the end of the installation I find hylafax, postfix , and all AC roundecube install it remains for me to set them up! Taking the example of Elastix cd: www.elastix.org/ or it can make all AC (but its main role is the PABX).
CentOS 5 Server :: Create A Box With Xfs Partition?
Aug 25, 2011I was trying to create a centos box with xfs partition,how can we install centos enabling the partion with xfs filesystem. rather than doing after installation.
View 1 Replies View RelatedCentOS 5 Hardware :: RAID Or Non-raid HBA Recommendation?
Dec 10, 2009I am going to be using CentOs 5.4 for a home storage server. It will be RAID6 on 6 x 1TB drives. I plan on using an external enclosure which is connected via two SFF-8088 cables (4 drives a piece). I am looking to try and find a non-RAID HBA which would support this external enclosure and allow to use standard linux software raid.
If this is not an option, I'd consider using a hardware based raid card, but they are very expensive. The Adaptec 5085 is one option but is almost $800. If that is what I need for this thing to be solid then that is fine, I will spend the money but I am thinking that software raid may be the way to go.
Red Hat / Fedora :: Create A Backup Of Centos 5 Server?
Apr 21, 2010Have been playing with Centos 5 and finally got it installed and have done most of the updates. Before I proceed much further it would be nice if I could create a backup/install disc of how it is now. No Data,just the setup and software used etc.Have a dvd rw on the server.I recall mondo rescue installed years ago on a linux server we used.
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Feb 23, 2011I've been attempting to run rpmbuild -bb on my centos 5.5 box to create the rpm for Python 2.7 to no success.
View 3 Replies View RelatedServer :: Create Independent Subdomain On Centos?
Sep 26, 2010creating independent sub-domains on my VPS.To describe this in clear words below is the example:I have a domain named as demo.com and k it as test1.demo.comand i have only one IP address assigned to me, which points to demo.com.So how can i set this sub-domain so that I will serve as a separate entity
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