Having a problem after a crash.Replaced system disk re-installed version 5.6.Now it does not recognise the RAID-disk connected to a SIL 3114 RAID-controller.Anyone have any ideas what to do.I can see both disks as sda and sdb, although the raid-controller reports them as a raid-set.Both disks are obviously reported with unknown partitions.Previously I used version 5.5, cant remeber any problems when I added the RAID.
View 7 RepliesWe ran out of space on our server hard drive, so I installed 2 x 1GB drives, set them up as a software RAID1 array, copied the contents of /home to it, mounted it as /home for testing. Everything OK, so I unmounted it,deleted the contents of the /home folders (don't worry, we're backed up), then remounted the array. Everything was fine until we rebooted.Now I can't access the array at all; during booting the error "mount: special device /dev/md1 does not exist" comes up twice, and manually trying toe same issue.The relevant line from fstab reads:/dev/md1 /home ext3 defaults 0 0.However, using webmin shows only md0, the RAID0 device on which the OSD was originally installed.There is no /dev/md1 device file.The mdadm.conf file reads as follows:
# mdadm.conf written out by anaconda
DEVICE partitions
MAILADDR root
ARRAY /dev/md0 level=raid0 num-devices=2 uuid=76fd4050:fb820568:c9bd3a59:ad3e70b0
I've just put together a Centos 5.2 system using an old Future Domain SCSI card which would allow me to hook up an external DAT drive. On its BIOS screen it advertises itself as an AHA-2920 which should be handled by the aic7xxx module. However, the module doesn't even get loaded unless I force it in /etc/rc.modules and even then it doesn't pick up the card.
View 2 Replies View RelatedI 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 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.
I'm working on a server and noticed that the to RAID5 setup is showing 4 Raid devices but only 3 Total devices. It's on a fully updated CentOS 5 system that only has three SATA drives, as it can not hold anymore. I've done some researching but am unable to remove the fourth device, which is listed as removed. The full output of `mdadm -D /dev/md2` can be see below. I've never run into this situation before.Anyone have any pointers on how I can reduced the Raid Devices from 4 to 3? I have tried
mdadm /dev/md2 -r failed
mdadm /dev/md2 -r detached
but neither work and since there is no block device listed I'm not quite sure how to get things back in sync so it's only seeing the three drives.
/dev/md2:
Version : 0.90
Creation Time : Tue May 25 11:07:04 2010
Raid Level : raid5
[code]....
The installer can't see my raid controller (I assume) as I'm getting the following error:"Error opening /dev/mapper/isw_jbhgjgjj_Vol0: No such device or address"It just sees them as 4 individual drives: sda, sdb, sdc and sdd.Please note that I have set up the RAID 5 in the controller bios interface and the image name is Vol0, which it seems that it tries to load but for some particular reason it can't.I have also tried different bios settings and nothing worked.
View 3 Replies View RelatedMy problem is that I'm trying to install CentOS 5.4 x86_64 DVD ISO on Supermicro X7SBI server with installed Adaptec RAID 3405 controller.
I created RAID 5 array and is working fine (adaptec status says Optimal) but I can't install CentOS to that array (1.5TB size).
Whenever I try to install with: linux dd
I'm asked for a driver, which I have downloaded from Adaptec site and extracted contents to USB drive (in installation found as /sba1) which has now a lot of IMG and some ISO files on it.
I try to load (I simplified names) RHEL5.img, CENTOS.img... with x64 names (one exact name: aacraid driverdisk-CentOS-x86_64.img) and I always get the error message: "No devices of the appropriate type were found on this driver disk"
This is going on for a week now and I can't find the right driver or something I'm doing wrong to get install done.
I need your help urgently. I will shortly install Centos 5 on a HP DL380R05 E5420 Server with two HP 146GB 10k 2.5 SAS HP SP hard disks running hardware RAID-1. I am a newbie on CentOS, please advise me:
1. Do I need a Centos RAID device driver for hardware RAID-1 on the HP DL380R05 E5420 Server?
2. Should I use Centos i386 or Centos x86_64 in this case? Which one: CentOS 5.2 or CentOS 5.3?
3. Does Centos support Embedded NC373i Multifunction Gigabit network cards?
The following is my server's hardware configuration:
HP DL380R05 E5420 2GB Base AP Server(1) Quad-Core Intel Xeon Processor E5420 Two Embedded NC373i Multifunction Gigabit / 2 GB (2 x 1 GB) PC2-5300 Fully Buffered DIMMs (DDR2-667)/HP Smart Array P400/256MB Controller /Rack (2U)/Hot Plug Fully Redundant Fans Standard Two HP 146GB 10k 2.5 SAS HP SP HDD HP 1000W IEC C14 Cord RPS Kit
I've a Centos 5.1 server on S5000vsa Intel board with 6 bay HD in raid 1 mode (2 HD), and working fine until I've decide to make a yum update. Today the Centos is 5.4 but seems necesssary to upgrade the megasr driver for the raid function (i.e. , is not possible to contact the raid firmware trought Web Console 2). I've download the last megasr driver from Intel and I follow the instruction to upgrade the driver with s.o. installed, but when I start the server and choose via grub the new img boot file, the display show :
megasr.ko invalid module format -1 and stop. The linux version is the same in the machine (uname -a) and from the driver (2.6.18-164.9.1.el5). Another question : in Intel instruction spoken about megasr.o , but on img file I found a megasr.ko . I think instructions referre to old linux 2.4
I'm setting up a raid 5 on several hard disks with a layer of lvm on top for good measure.I know the recent kernels support growing software raid, but since centos runs 2.6.18, I wanted to make sure it'll work. Does the centos kernel support growing raid devices?
View 1 Replies View RelatedCould 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.
I have DELL R310 server with PERC 200H controller and RAID 5 configured already.This is my first time I want to install CentOS and seems like a new challenge for me I've read some articles on Wiki and posts on this forum and didn't find any information how to install CentOS on RAID 5.I only noticed that if there is fake or software RAID1 it should be switched off and made by OS configuration.I think PERC 200H is separate controller so RAID 5 is hardware RAID, is there anybody who can confirm ?My problem is that when I try to install CentOS it doesn't see any hard disks ... I looked for drivers on DELL web site and there is driver for Red Hat 6. I tried to install it using linux dd command but it doesn't recognize. Is there anybody else who met such problem ?
View 3 Replies View RelatedRecently while using a Highpoint 2310 (raid 5) I lost the mother board and CPU. I had to reinstall Centos and found it needed to initialize the array to function. Total loss of date. Question: If I use a true hardware card (3ware 9650se) and experience a serious hardware loss or the C drive can the card be installed with the drives on a new motherboard and function without data loss even if the OS must be reinstalled.
View 4 Replies View RelatedI tried install Centos 5.2 (i386) on Dell PowerEge 2950 server with SAS RAID disk (RAID 5 on PERC 6/i created from six HDD, 1 TB each). I never installed Centos on a disk over 2 TB.
I find out that i need use gpt instead mbr. I tried use rescue mode + parted but after rebooting I got message "Can't boot from from GPT partition" whet tried install. But when the space is partitioned by installer, I can't boot up.I got msg PBR not found. My ask is: "Can I boot directly from GPT partition? If yes how do it?" Or even better "How to install centos 5.2 on disk bigger than 2 TB?"
I installed CentOS 3 and during the installation, I configured the disks using 'software RAID'. Then I installed my /data partion on /dev/md0. Everything seemed fine however I install a extremely bare installation of CentOS 5.3. I don't select any packages during the install process which includes anything under the 'base' package software selection. I then noticed that because I configured my system with 'software RAID', it found 'mdadm' as a dependency package and installed 'mdadm' however this also then grabbed 'exim-mta' package so now I have 1/2 a mail server installed simply because I have software RAID on my box. I am not permitted to have anything beyond 'Postfix' MTA on my LAN. I don't want Postfix any ways on this machine so is there a way I can install CentOS 5.3 cleanly w/o packages I don't want or need? I am sure I can 'yum remove exim' and that in turn will remove 'exim & mdadm' from my machine however I would like to start fresh.
View 1 Replies View RelatedWhat are the things that i need to do to be able to install CentOS 5.3 on RAID 1 drive.I have tried to install other OS like Ubuntu 9.10 and lower and they all work fine.Problem is that, during the initial installation, it could not find any drive therefore i could not proceed with the installation.
View 3 Replies View RelatedI can not to mount md2 to recovery my file form hdd, Must be active md2 to can be mounted?
View 6 Replies View RelatedI 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 RelatedI've got a server running a software Raid for SATA disks on a P5E motherboard.
I had to had a lot of memory on thi sserver, then I have had to flash the bios. This has resetted the software raid on the disks, then when I boot, i got a Kernel Panic cause it doesn't find anything ...
how to rebuild the raid ? I can boot on a live cd, or anything else, but don't know how to do it without loosing my data.
I have expanded a HP array by 500GB but am struggling to get Centos (Xenserver installation) to see it.
From the array controller the size of the disk is 1.4TB
Logical Drive: 2
Size: 1.4 TB
Fault Tolerance: RAID 5
Heads: 255
[Code].....
how I get LVM to see the whole disk that is now available (without destoying daya).
I'm trying to install centos on a softraid 10. Unfortunately this isn't supported standard. When i try to enable raid 10 in mdadm i get an error wich says modules can't be parsed.
how to enable raid10 during install?
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?
View 1 Replies View Related1. One of my hdds failed (sda) in software raid 1. I rma'd the hdd to western digital and got another one. Now do I have to format it before putting it in my centos server? If yes, how do I format?
2. Also since sda drive failed, I gotta mark sda as failed in raid. Then remove the sda hdd, and pop in the new hdd for sda? Or do I switch sdb to sda and put the new hdd in sdb's place?
3. After that add it to raid correct, then once raid rebuilds I have to do grub? Can grub be done via ssh only? or do I need to be at the datacenter or get kvm?
4. Last question, I've got a supermicro hotswap hdd case, so do I need to shutdown server while I replace the hdd's? I just want to be sure I do this correctly.
The following is the guide that I will be using, please look at it and let me know if that is the correct procedure: [URL]. Another thing, when the hdd (sda) failed I put it back into raid, but the hdd has bad sectors that is why m replacing it.
I'm setting up a backup server using Centos 5.3 and an Adaptec 5805 raid card and discovered that I can't use a raid setup that is over 2TB in size as the boot drive. What I eventually did was set up 2 raids on the same set of 4 drives so that I have a 200Gb 'drive' for booting and a 2.6TB 'Drive' for data. I want to keep the OS in the raid setting so I have some protection instead of having a dedicated stand alone drive for the OS. This will be for a company wide backup server and I want to minimize the possibility of drive failure for the OS as well as the Data.
I was able to install and reboot the system and everything seemed to be working but after some working on it a bit I did a reboot and wound up with a non-booting system. I can boot to the rescue mode with the install dvd and mount the original system and I even tried to reinstall the grub setup per instructions I found on the net but still I get a system that hangs up after it asks if I want to boot from the CD. If I take out the CDROM option from the boot lineup in the bios I stop at the same place minus the boot cd prompt.
I'm guessing it is something to do with one of the raid drives being over 2TB but I'm booting from a 200gb sized raid so I'm really at a loss for what to do next??
Is what I've described the correct way to handle booting up with a large raid or is there another way to reconfigure the drives as one big 2.8TB raid and use something other than grub to boot to it?
I've started this new topic because my original one was a bit old and my circumstances have changed a bit. I'm trying to install Centos on a system with a adaptec 5805 hardware raid card, real raid not faked, and am having problems when a large, over 2tb, sized array is partitioned. I have two raids on the card, one is a raid 1 with 2 500gb drives that I am installing the OS to and the other is 4 1tb drives in a raid 5 so I wind up with around a 2.7tb array. I was having all kinds of problems when I left both arrays in place during the install but a firmware upgrade on both the motherboard and the raid card seemed to improve it to the point where as long as I do not tell the install to format the 2.7tb array in any way I can get the install finished and it will boot up and work. If I touch the array in any way during the install I get a system hang after a question about booting from the cdrom drive.
My final test was to do a fresh install and remove and re add both arrays so they were clean and leave the 2.7tb array completely out of the install process. Then after install I set up a gpt partition using parted from the command line, I didn't even put a file system on it. When I rebooted I got the same hang up after a cdrom boot prompt. I then used the install dvd to boot into rescue mode and wiped the partition on the 2.7tb array using
dd if=/dev/zero of=/dev/sdb bs=1024 count=1024
which made the drive out to be empty. Now the system boots up fine again. The only thing I can't tell, since it goes by too quickly, is if there is any kind of cdrom prompt like when the array is partitioned. I'm wondering if when the array is partitioned as a gpt is it possible it looks like a cdrom and thus stopping the boot somehow? Is there any other way of partitioning a 2.7tb array so I can see if taking gpt out of the equation will fix the problem??
As the topic says: is it possible to set up a software RAID 1 during the installation of CentOS 5.4? Or is it only possible to set up RAID 0?
In case that RAID 1 is possible: could someone be so kind and tell me how to set RAID 1 up? Which checkboxes to check and which partitions to make? I have 2 equal HDDs and use the graphical installation of CentOS.
I have a previously defined RAID5 (4 disks). This worked in Ubuntu 8.04.. I recently moved to CentOS5.. and I cannot seen to get the drive back online.cat /proc/mdstat shows, no raid levels (personalities).. and no drives listed.mdadm --detail -scan returns nothing.mdadm --QE returned a UUID string.. and the ARRAY output.I can mdadm --examine all the members of the original array.I am not versed in mdadm enough to really understand what I can run and should not run that would erase the data on the drives. Please assist.. I will try to post exact output of commands.. but the system is kind of unreachable and being rebuilt... i just want to ensure my data on the array is not lost
View 7 Replies View RelatedRound two:I am trying to install a RAID 1 array on my system. I already have another RAID 1 array in there. I am using the BIOS RAID option to set up the array.Here's what dmraid -r tells me:
# dmraid -r
/dev/sda: pdc, "pdc_bajfedfacg", mirror, ok, 3906249984 sectors, data@ 0
/dev/sdb: pdc, "pdc_bajfedfacg", mirror, ok, 3906249984 sectors, data@ 0
[code]....
We can create normal raid levels in centos using mdadm, but how can we create nested raid levels ( example raid 1+0 Raid 0+1).
View 2 Replies View Related