CentOS 5 Hardware :: Not Finding RAID 1 Hot Spare On Boot?
Apr 18, 2011
When I set up my current workstation (now at CentOS 5.6) I connected the two SATA drives in a RAID 1 configuration. Later, I realized I had a spare EIDE drive , so installed it, partitioned, and added it as a hot spare using "mdadm -a". So, now I have three disk drives doing the work of one.I updated /etc/mdadm.conf using the output from mdadm --examine --scan, and the resulting lines are:ARRAY /dev/md0 level=raid1 num-devices=2 UUID=1f00f847:088f27d2:dbdfa7d3:1daa2f4e spares=1ARRAY /dev/md1 level=raid1 num-devices=2 UUID=f500b9e9:890132f0:52434d8d:57e9fbfc spares=1I also updated the /boot/grub/device.map file to read:
(hd0) /dev/sda
(hd1) /dev/sdb
(hd2) /dev/hda
[code]....
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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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Aug 4, 2010
I want to build a 6xSATA RAID 5 system with on of the disks as spare disk. I think this give me a chance of 2 of 6 disks failing without losing data. I am right?
Hardware: Intel ICH10R
First I will creat a 3xSATA RAID 5, after I will add the spare disk and after that I will add the others disks. This is what I think I should do.
Step 1:
Create RAID Device
Code:
mdadm --create --verbose /dev/md0 --metadata 1.2 --level=5 --raid-devices=3 /dev/sda1 /dev/sdb1 /dev/sdc1
I read that "--metadata 1.2" is the best option. It is true?
Create filesystem on the RAID device
Using this method of calculation:
* chunk size = 128kB (for RAID 5)
* block size = 4kB (recommended for large files, and most of time)
* stride = chunk / block = 128kB / 4k = 32kB
* stripe-width = stride * ( (n disks in raid5) - 1 ) = 32kB * ( (5)- 1 ) = 32kB * 4 = 128kb
Then:
Code:
mkfs.ext3 -v -m .1 -b 4096 -E stride=32,stripe-width=128 /dev/md0
Step 2:
Add spare-disk
Code:
mdadm --add /dev/md0 /dev/sdd1
Is this enough?
Step 3:
Adding disks:
Code:
mdadm --add /dev/md0 /dev/sde1
mdadm --grow /dev/md0 --raid-devices=4
fsck.ext3 /dev/md0
resize2fs /dev/md0
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May 3, 2011
I have a dell with win7 installed on two disks as raid0. I added a 3rd HD and installed 11.04 on to it. This boots ok but only Linux shows in the grub menu. Win7 is not there and I have no way to boot it as the installer put grub on disk0 of the raid overwriting the windows boot prog.
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Jun 24, 2010
So, I have raid5 array with one spare disk. Is it possible to spin-off/shutdown the spare disk until one drive fails and the spare disk is needed?
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Mar 25, 2011
I have been running a server with an increasingly large md array and always been plagued with intermittent disk faults. For a long time, I've attributed those to either temperature or power glitches. I had just embarked on a quest to a) lower case and drive temperature. They were running between 43 and 47C, sometimes peaking at 52C, so I've added more case fan power and made sure the drive cage was in the flow (it has it's own fan, too). Also, I've upgraded my power supply and made very sure that all the connectors are good. The array currently is a RAID6 with 5 Seagate 1,5TB drives.
When everything seemed to be working fine, I looked at my SMART logs and found that two of my drives (both well over 14000 operating hours) were showing uncorrectible bad blocks. Since it's RAID6, I figured, I couldn't do much harm, ran a badblocks test on it, zeroed the blocks that were reported bad, figuring the drive defect management would remap them to a good part of the disk and zeroed the superblock. I then added it back to the pack and the resync started. At around 50%, a second drive decided to go and shortly thereafter a third. Now, with two out of five drives, RAID6 will fail. Fine. At least, no data will be written to it anymore, however, now I cannot reassemble the array anymore.
Whenever I try I get this:
Code:
mdadm --assemble --scan
mdadm: /dev/md1 assembled from 2 drives and 2 spares - not enough to start the array
Code:
cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [linear]
md1 : inactive sdf1[4](S) sde1[6](S) sdg1[1](S) sdh1[5](S) sdd1[2](S)
7325679320 blocks super 1.0
md0 : active raid1 sdb2[0] sdc2[1]
312464128 blocks [2/2] [UU]
bitmap: 3/149 pages [12KB], 1024KB chunk
Which is not fine. I'm sure that three devices are fine (normally, a failed device would just rejoin the array, skipping most of the resync by way of the bitmap) so I should be able to reassemble the array with the two good ones and the one that failed last, then add the one that failed during the resync and finally re-add the original offender. However, I have no idea how to get them out of the "(S)" state.
Code:
mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : d79d81cc:fff69625:5fb4ab4c:46d45217 .....
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Aug 4, 2010
I want to build a 6xSATA RAID 5 system with on of the disks as spare disk. I think this give me a chance of 2 of 6 disks failing without losing data. I am right? Hardware: Intel ICH10R First I will creat a 3xSATA RAID 5, after I will add the spare disk and after that I will add the others disks. This is what I think I should do.
[code].....
EDIT:I'm thinking in put LVM with the RAID 5. What are the advantages and disadvantages of it (LVM over RAID 5). It is safe? My MB (Asus P5Q) have Chipset Intel P45 ICH10R. What kind of RAID have it? Hardware RAID, fake RAID, BIOS RAID, software RAID? This are the specs of storage
[code].....
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Jun 9, 2011
so I setup a raid ten system and I was wondering what that difference between the active and spare drives is ? if I have 4 active drives then 2 the two stripes are then mirrored right?
root@wolfden:~# cat /proc/mdstat
Personalities : [raid0] [raid10]
md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1]
[code]....
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Feb 23, 2010
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??
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Apr 22, 2010
I'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]....
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Jan 8, 2011
I have a pre-existing setup with Windows XP Professional and CentOS5.5 on a dual boot setup with the Linux drive setup as the primary drive hosting the grub menu.
I am replacing these machines with new updated ones and they have windows setup on a RAID0. I think it would be easiest to follow my previous setup and move the RAID to secondary SATA ports and put the linux drive on the primary SATA port, or should I just change the boot order in the BIOS to have the secondary linux drive boot first?
can I move a RAID setup to secondary controller ports without breaking the RAID?
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Dec 19, 2010
Configuration:
Centos 5.4
2 Corsair F80 RAID 0 Intel Storage Matrix
ASUS P6x58D-E
Stripe Size = 128kB
Tried to run Centos 5.5 in Dual Boot Configuration with Windows 7. Windows Y installed without issues within minutes (amazing performance with the SSD's). Installed Centos 5.4 several things that wouldn't work right:
- wouldn't recognize the NTFS partitions. So I decided just to install Centos on the box. Completed installation and rebooted but it wouldn't boot up after the installation. Even in NON RAID configuration it would not boot of the SSD. Replaced SSD's with 2 Seagate Barracuda's 1TB in RAID 0 configuration and all went well.
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Aug 3, 2010
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.
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Nov 26, 2010
I have installed Ubuntu on my m1530 since 8.04 and currently dual boot Win7 and 10.10. I would like to dual boot on my PC, but I have run into a problem. I am not a pro at Ubuntu, but this problem I can not solve by reading forums like I have in the past.
I realize this is a common problem, but I have noticed people having success.
I have a M4A87TD EVO MB with two Seagate drives in Raid 0. (The raid controller is a SB850 on that MB) I use the raid utility to create the raid drive that Windows7x64 uses. I have 2 partitions and 1 unused space. Partition 1 is Windows, partition 2 is for media, and the remaining unused space is for Ubuntu.
I am running ubuntu-10.10-desktop-amd64 off a Cruzer 16GB flash drive that was installed via Universal-USB-Installer-1.8.1.4.
My problem like so many others is that when I load into Ubuntu, gparted detects two separate hard drives instead of the raid. I read that this is because kpartx is not installed on 10.10. I then went in LiveCD mode and downloaded kpartx from Synaptic Manager. Gparted still reported two drives. I opened terminal and run a few commands with kpartx. I received an error. (Forgive me I didn't write it down, but I believe it said something about a communication error. I will try again later and see.)
Currently I am reflashing the Cruzer with a persistence of 4GB. I am not familiar with this process, but I understand that my LiveCD boot will save information I download to it. I decided to try this method because I was going to install kpartx and reboot to see if this made a difference.
I am looking for any suggestions on a different method or perhaps someone to tell me that the raid controller or some hardware isn't supported. I did install ubuntu-10.10-alternate-amd64 on my flash drive, but fail to get past detecting my CD-ROM drive since it's not plugged in. If this method is viable, I will plug it in. I also watched the ..... video were a guy creates Raid 0 with the alternated CD, but it wasn't a dual boot and didn't use a raid controller from a MB.
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Dec 10, 2009
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.
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Sep 15, 2010
It's been a real battle, but I am getting close.I won't go into all the details of the fight that I have had, but I've almost made it to the finish line. Here is the set up. ASUS Z8PE-D18 mother board 2 CPU, 8 Gig Ram. I recently added an OCZ Agility SSD, defined a raid 1 virtual disk on the 1 terabyte WD HDD drives, which will holds all of my user data, the SSD is for executables.The bios is set to AHCI. Windows 7 installed fine, recognizes the raid VD just fine.
I installed Ubuntu 10.04 by first booting into try and mode, then opening a terminal and issuing a "sudo dmraid -ay" command. Then performing the install. I told it to install the raid components, and told it to let me specify the partitions manually. When setting up the partitions, I told it to use the free space I set aside on the SSD from the Windows 7 install as ext4 and to mount root there. Ubuntu installed just fine, grub2 comes up just fine, and Windows 7 boots with out a hitch, recognizing the mirrored partition as I indicated previously. When I tell grub to boot linux however, it pauses and I get the "no block devices found" message. It will then boot, but it does not recognize the raid array. After Ubuntu starts up I can run "dmraid -ay" and it recognizes the raid array, but shows the two component disks of the raid array as well. It will not allow the component disks to be mounted, but they show up which is annoying. (I can live with that if I have to)
I have fixed a similar problem before by setting up a dmraid script in /etc/initramfs-tools/scripts/local-top ... following the instructions found at the bottom of this blog:[URL].. To recap: My problem is that after grub2 fires up Ubuntu 10.04.1 LTS (Lucid Lynx), it pauses, and I get "no block devices found" It then boots but does not recognize the raid array untill I manually run "dmraid -ay". I've hunted around for what to do but I have not found anything. It may be some timing issue or something, but I am so tired of beating my head against this wall.
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Dec 7, 2010
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]....
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Feb 15, 2009
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.
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Jan 13, 2010
My 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.
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May 7, 2009
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
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Dec 31, 2009
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
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Oct 16, 2010
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?
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May 10, 2011
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 ?
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Oct 12, 2010
Recently 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.
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Nov 1, 2010
Forgive the terseness. I'm frazzled with this issue, perhaps I should have asked earlier. Every weekend for the past 2 months has been an endless cycle of 'repair broken system' off the install disk.
Installed from Ubuntu server 10.04LTS x86_64, + xfce-desktop Here is uname -a Linux ournas 2.6.32-25-server #45-Ubuntu SMP Sat Oct 16 20:06:58 UTC 2010 x86_64 GNU/Linux If I add my raid + lvm to the fstab file, the boot stalls, (no error it, just hangs waiting, forever). So that's a not very user friendly to start with.
I've tried the suggestions about UUID in fstab tried using LABEL instead, or even /dev/xxx. Every time it hangs. I've googled this endlessly and not found a solution. So don't ask why... since I seem to have tried every odd suggestion to fix this, I've lost track. There seems to be some consensus that whoever gave us plymouth laid an egg. Forgive me if I'm wrong, but did we need a better graphical boot if it breaks everything else?
[Code]...
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Jan 21, 2011
For several days I stuck on a problem despite my various searches on the net. I just installed a machine in RC1 Squeeze.
My Partitioning
Disc 1
/ boot RAID 1
/ swap RAID 1 and encrypted
/ RAID 1 and encrypted
[Code]....
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Jan 3, 2011
I am a novice running a dedicated server. how to find out which version of Centos my server is running. I am trying to install IonCube.
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May 11, 2011
I am trying to search a tool for testing multicast. Currently, 'yum search multicast' yields nothing. I saw mcsender and mctest in google but they seem not to be supported in CentOS. Do you know any tool that can test multicast?
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Mar 31, 2009
I'm new to the yum installation route and am looking forward to getting some experience using it, however, I am working to build a Nagios server through yum and have run into difficulties meeting the dependencies. (I'd previously installed from source on a different server though I'd been warned is a bad thing so I am trying to make nice and go this route but have run into snags right off...) The dependency hurdle I'm trying to overcome is getting to GLIBC2_4 from my version of 2.3.
I've read through a number of posts where people have had issues getting glib updated or gcc installed correctly. This is pretty much a new installation of CentOS (VM cloned off an earlier install that was taken just after going through the GUI setup). As far as I have gotten is 'yum update' which updated the kernel and openssl.
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Aug 11, 2009
Is there a list of RPMs with known vulnerabilities? I was hoping to run some scripts across the list of currently installed packages vs such a list of vulnerable, to get an idea of what systems need attention. And no, just updating everything is neither an option, nor possible. My servers don't have access (nor do I want them to) to the outside world. Further, being production systems, I can't cause a disruption outside of scheduled down time, and due to running commercial software I can't upgrade some packages due to vendor support issues.
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