Fedora Servers :: Recovering From Software RAID Failure (controller Died)
Jan 3, 2009
I had a RAID1 'device' build on two physical partitions on two drives. One of the disk controllers died and software RAID did the job - now I am working on the degraded array.
Now I want to put the old disk (sdb) back, and I am not sure what will happen. Both disks have 'raid auto' partitions. And sdb file structure from before of the failure. The raid code will find inconsistency between both partitions. What will it decide? Will it start coping from the currently running system (sda) all the data to the old one (sdb) at the boot time, as I wish?
I don't want to it to write from the old one to the new one, as some months passed and lots of changes happened to the data.
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Mar 12, 2011
I'm testing my ability to recover a failed disk on a three disk software RAID 5 setup.
I have used a 10.04 alternate install disk to setup a three disk RAID 5 array according to this: [URL]. This is for a RAID1 setup. I followed it exactly except that I performed the steps on three drives rather than two and selected RAID5 instead of RAID1. Each disk is 500GB and has a 26 GB swap partition and the remaining space on each disk set as / with the boot flag on.
I installed the OS on my array and everything boots without a problem. After I booted up I started a terminal and ransudo dpkg-reconfigure mdadm to set the boot degraded to true and rebooted.
Next, I shut down the computer, disconnected the power on drive 1 (sdb) and then tried to boot. I get this (not verbatim):
Quote:
mdadm: CREATE user root not found
mdadm: CREATE group disk not found
raid5: raid level 5 set md0 active with 2 out of 3 devices, algorithm 2
mdadm: /dev/md0 has been started with 2 drives (out of 3)
[Code].....
*then a list of common problems and then:
ALERT! /dev/disk/by-uuid/bunchanumbersnad letters does not exist. Dropping to a shell
Then it dumps me to initramfs. MD0 is the swap partition. At this point I don't know what the heck to do. I'm skating on the edge of noobidity and this is pretty much over my head.
I want to use this server as a virtual machine server and the desired behavior would be that, if a hard drive should fail, the server would alert me via email and continue to run in a degraded state.
Is it even possible to install the OS on the array and run it degraded? Given the desired behavior, should I be looking at something other than RAID5? My client is broke so I'm trying to avoid a hardware RAID if I can do it.
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Jun 3, 2010
I'm having a problem with the installation of Ubuntu Server 10.04 64bit on my IBM xSeries 346 Type 8840. During the installation the system won't recognize any disk, so it's asking which driver it should use for the RAID controller. There's a list of options, but nothing seems to work. I've been searching the IBM website for an appropriate driver, but there is no Ubuntu version (there is Red Hat, SUSE, etc). I was thinking about downloading the correct driver onto a floppy disk to finalize the installation, but apparently no 'general' Linux driver to solve the problem here.
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Sep 4, 2010
I was trying to update the drive for my adaptec raid controller. Unfortunately, Adaptec only provides RPM packages. So I converted the package using alien. After dpkg install, I then tried using dkms to build the module:
Code:
root@atulsatom# dkms add -m aacraid -v 1.1.5.26400
Adding driver was successful, but I got some error during the build
Code:
root@atulsatom# dkms build -m aacraid -v 1.1.5.26400
Kernel preparation unnecessary for this kernel. Skipping.
[Code]...
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Jan 12, 2011
I have been thinking about upgrading my RAID setup from a pair of Intel X25s running the software based RAID included with ubuntu to four Intel X25s running off a PCIe based controller. The controller is an HP P400 which I know works great on ubuntu (I have other machines running it with SAS drives). My desktop has an Intel S5000XVNSATAR mainboard and I have an open PCIe v1.0 8x (physical) slot that is wired 4x. The controller is 8x and will fit fine. How much of a performance hit do you think I will see running this 8x controller in the slot wired 4x with four Intel x25s in a RAID 10? Will I have enough bandwidth with the 4x for those SSD's?
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Mar 12, 2010
I've recently started having an issue with an mdadm RAID 6 array that been operational for about 2500 hours.
Intermittently during write operations the array stalls, dropping to almost 0 write speed for 10-30 seconds. When this occur one or both of the 2 drives attached to a 2 port Silicon Image si3132 SATA-II controller "locks up" with its activity light locked on. This just started occurring within the last week and didn't seem to coincide with any update that i noticed. The array has just recently passed 12.5% full. The size of the write does not seem to make any difference and it seems completely random. Some times copying a 5 GB dataset results in no slow down other times a torrent downloading to the array at 50kb/sec does cause a slow down and vise versa.
The array consists of 8 WD 1.5TB drives, 6 attached to the ICH9R south bridge, and 2 attached to a si3132 based PCI express card. The array is formatted as a single ext4 partition.
Checking SMART data for all drives shows no errors. Testing read speed with hdparm reports what i would expect (100mb/sec for each drive, ~425mb/sec for the array).
The only thing i did notice is that udma6 is enabled for all the ICH9R drives while only udma5 is enabled for the si3132 drives. Write cache is enabled for all the disks. Attempting to set the si3132 drive to udma6 results in an IO error from hdparm.
The si3132 drive is using the sata_sil24 driver. Nothing of interest appears in the kern or syslog. During this time top shows very high wait time.
The s13132 controller appears to have the original firmware from 2006 loaded, there are some firmware updates available on the Silicon Image website for this controller that now appear to offer separate firmwares for RAID operation (some sort of hybrid controller/software thing the controller supports) and a separate firmware for standard IDE use.
Has anyone had similar issues with this controller? Is a firmware update a reasonable course of action? If so which firmware is best supported by the linux driver?
I know i'm not using its raid features but i've dealt with controllers that needed to be in raid mode for ahci to be active and for linux to work well with them. I'm bit ify at the idea of just trying it and finding out as it could knock 2 disks of my array out of action.
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Sep 6, 2010
Based on the reading I've done over the past 48 hours I think I'm in serious trouble here with my RAID 5 array. I got another 1 TB drive and added to my other 3 to increase my space to 3 TB...no problem.
While the array was resyncing...it got to about 40%, I had a power failure. So I'm pretty sure it failed while it was growing the array...not the partition. Next time I booted mdadm didn't even detect the array. I fiddled around trying to get mdadm to recognize my array, but no luck.
I finally got desperate enough to just create the array again...I knew the settings of my and had seen some people have success with this method. When creating it, it asked me if I was sure because the disks appeared to belong to an array already, but I said yes. The problem is when I created it, it created a clean array and this is what I'm left with.
Code:
/dev/md0:
Version : 00.90
Creation Time : Sun Sep 5 20:01:08 2010
Raid Level : raid5
Array Size : 2930279808 (2794.53 GiB 3000.61 GB)
[Code]....
I tried looking for backup superblock locations using e2fsck and every other tool I could find, but nothing worked. I tried testdisk which says it found my partition on /dev/md0, so I let it create the partition. Now I have a /dev/md0p1, which won't let me mount it either. What's interesting is gparted reports /dev/md0p1 as the old partition size (1.82 TB)...the data has to still be there, right?
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May 31, 2010
I'm getting a HDD Lock screen or Disk Controller Failure at boot up. (Compaq Armada) The HDD stops the system dead. The controller failure will allow me to boot Fedora or Puppy from the CD drive.
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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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Jan 29, 2009
I am trying to install FC 10 on my built-in Adaptec raid controller and the Live CD does not see the controller.From my other ATA drive FC10 install I get this from lspci -v:
Code:
00:1f.2 RAID bus controller: Intel Corporation 6300ESB SATA RAID Controller (rev 02) (prog-if 8f)
Subsystem: Super Micro Computer Inc Device 5180
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 18
I/O ports at e200 [size=8]
[code]...
sdb and sdc are the SATA raid disks... they have already been partitioned as a single raid 0 device... not sure why / how they stil show up as two disks.
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Dec 31, 2009
my setup
P4 3.4GHZ
2GB Ram
Gigabit Ethernet
Drive Configuration
1 x 750GB Sata
Connected To My Raid Controller in ide mode
1 x 120GB IDE HDD
1 x 250GB IDE HDD
my problem, I Am trying to install f12 and the only drive that it sees is the 750GB Sata,it is not seeing the other 2 ide drives The raid controller is an ite 8212 in ide mode The Bios Sees the drives just F12 doesnt
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May 10, 2009
I want to Install RHEL 4.7 64 bit on one my server (Supermicro Super Server) having RAID controller1. Intel2. AdaptecWe are using Adaptec.We are using RAID 1 with 2x320GB Hard disksPOINT: If we Install RHEL 5.3 it recognize RAID controller and show single Logical volume of 298 GB, Means working fine but when we try to install RHEL 4.7 it shows two hard disks of 298GB and 298GB,meanz its unable to recognize RAID controller.So, the issue is Driver of it, CD which we got from super micro having driver for RHEL 4 to RHEL 4 update 6We are making our DR site and its necessary for us to Install RHEL4.7 to make it identical.I searched a lot and spent more than three days on it continuously, And still unable to find the solution.
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Aug 11, 2010
So I've pulled two hard drives out of my busted windows xp system (dead mb) and I'm trying to get some data off of them. The drives are in raid 0, so my friend told me that I might be able to do something if I use linux. Some late night searching on the internet directed me to a few resources, one of which was this forum. I've tried 2 methods, neither of which have worked.
1. mdadm
ubuntu@ubuntu:~$ sudo mdadm --detail /dev/sdb
mdadm: /dev/sdb does not appear to be an md device
2. dmraid
ubuntu@ubuntu:~$ sudo dmraid -s
/dev/sdb: "sil" and "hpt45x" formats discovered (using hpt45x)!
ERROR: sil: wrong # of devices in RAID set "sil_agafdhcebccj" [1/2] on /dev/sda
ERROR: removing inconsistent RAID set "sil_agafdhcebccj"
[code]....
I've got some files for work that I'd really like to get off there. I've played with unix a bit in college and I've ran ubuntu before, but usually using the GUI, so a lot of this stuff is over my head. But from what I gather, my system thinks that one of the drives isn't a raid drive?
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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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Jun 30, 2011
I recognize that this isn't the typical question, but I have a problem with my OpenSUSE webserver, and I thought I would prevail on the community for some guidance. I have this webserver with an important MySQL db on it. The RAID array seems to have died while I was moving. (did someone drop it? dunno) Now it can't find any boot device. It has 4 old SCSI drives.
So, I know how to mount a IDE or SATA drive as a slave, in a Linux environment to read data off of it (to copy the MySQL files off of it.) But, how do I do that with a SCSI drive? Also, I have an additional (identical) server to the crippled one. What will happen if I just slide one of the scsi drives into the operating server? Is this second identical server going to help me at all? I don't even know what is on it. Can I reconfigure the RAID, so it's not using a drive, and then slide in a disk from the crippled server, and copy the data off of it?
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Jun 3, 2010
After a disastrous upgrade to 10.04 I am at my wits end trying to recover my /home partition from my unbootable system. The /home partition is part of a RAID5 array across 4 disks and I've been trying to use some disk imaging tools from Ultimate Boot CD to recover it with, but none of the utilities seem to recognize or will let me work with my multi-disk device.
Currently I've been booting up with a Live CD in attempts to mount the encrypted partition then copy all the files to an external device I bought, but the mounting process has presented me with some problems. The partition in encrypted with ecryptfs and I have both the disk's passphrase as well as an FNEK signature to work with. Attempting the following:
Code:
Another small issue is the cipher I used. I don't remember which kind of encryption the disk is encrypted with (80% sure it's aes though). I assume figuring out which cipher I used will be more like a guessing game through the ecryptfs mount prompt, but I'm wondering if this would affect the error message I get.
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Nov 26, 2010
First of all I am new user on fedora forum and I love Linux (special Redhat flavours) and want to replace windows into Linux Everywhere. I am having some issue in configuring PDC on Fedora,I want to replace my company Windows Domain controller and file server into fedora file and PDC, I tried from web and through 389-directory server but didn't succeed even once, how to configure PDC with Samba 4 + 389-directory Server, I have heard samba 4 is having awesome support and its better then windows DC, configuring Complete PDC. (Whatever need to configure PDC i.e. DNS, SAMBA 4, SWAT, WEBMIN, 389-Directory Server, Windows sync,).
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Nov 15, 2010
Anyone know where i can get drivers for LyCOM ST-124 Raid 5 controller?
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Jan 29, 2011
where i can get drivers for LyCOM ST-124 Raid 5 controller?
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Dec 20, 2010
I have been using lspci, dmidecode, and mpt-status to get hardware information on my Dell 1950 running Ubuntu 8.10. I'm pretty sure my server is using an embedded SCSI RAID controller from info I got from Dell's site:
1CR679Assembly, Card, SAS6IR, Integrated, Sled
1TX846Assembly, Cable, Controller SAS, POWEREDGE EXPANDABLE RAID CONTROLLER
When I run lspci I see:
01:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
PCI-Express is an actual...well, PCI card, right? But dmidecode shows that I have two x8 PCI Express slots that are both available. Sooo...I'm missing something. How am I running a PCI Express SCSI controller without using a PCI Express slot? In the event of not having the kind of info that I did (i.e. the service tag) how would I be able to tell at a glance whether a component like my RAID controller was embedded or not?
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Feb 6, 2010
I have a VT6421 based raid controller. lspci shows this: 00:0a.0 RAID bus controller: VIA Technologies, Inc. VT6421 IDE RAID Controller (rev 50) The drivers that come with it appear to have been compiled against an old kernel (I'm guessing). When I try to load them I get invalid module format. dmesg shows this: viamraid: version magic '2.6.11-1.1369_FC4 686 REGPARM 4KSTACKS gcc-4.0' should be '2.6.27.7-smp SMP mod_unload Does anyone know of a way to get this to work? I found the source for this, but it appears to only support Fedora, Mandrak, and RedHat. I can't get it to compile or make a driver disk.
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Mar 19, 2009
I'm working on a new server and it has an Nvidia SATA array controller with 2 250Gb SATA drives configured in a hardware array. When the first screen comes up I'm entering the option Linux DD for it to prompt me for the drivers but nothing ever happens. The screen says that it's loading a SATA driver for about 15 minutes and then the screen clears and has a plus sign cursor on a black screen. What am I doing wrong? The only driver that came with the HP server are for Redhat 4 and 5 and SUSE, will any of those actually work?
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Jan 14, 2011
After X days of blissful uptime my mysql failed on my server for some reason. I have had 0 problems with it for over a year and it simply died overnight. I have been upgrading old packages occasionally so it is possible that could have effected it. Anyway, after reading around tons about how /var/run/mysqld/mysql.sock doesn't exist and solutions to fix it I finally ended up attempting to reinstall mysql (I take regular database backups so I wan't concerned about losing data).
The typescript from this endeavor is here: [URL]. Hopefully someone knows what the heck is going on? EDIT: after pulling my hair out trying to get this to work for 5 days I decided to install simply wipe out ubuntu entirely and install 10.4 and try again. this worked, but its a horrible solution.
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Apr 24, 2010
I shall start off by saying that I have just jumped from Windows 7 to Ubuntu and am not regretting the decision one bit. I am however stuck with a problem. I have spent a few hours google'ing this and have read some interesting articles (probably way beyond what the problem actually is) but still don't think I have found the answer.I have installed:
Distributor ID: Ubuntu
Description: Ubuntu lucid (development branch)
Release: 10.04
Codename: lucid
I am running the install on an old Dell 8400. My PC has an Intel RAID Controller built into the MB. I have 1 HDD (without RAID) (which is houses my OS install) and then I have 2 1TB drives (These are just NTFS formatted drives with binary files on them nothing more.) in a RAID 1 (Mirroring) Array. The Intel RAID Controller on Boot recognizes the Array as it always has (irrespective of which OS is installed) however, unlike Windows 7 (where I was able to install the Intel RAID controller driver) .Does anyone know of a resolution (which doesn't involve formatting and / or use of some other software RAID solution) - to get this working which my searches have not taken me too?
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Mar 13, 2011
Why could there not be a 3-way or even 4-way RAID level 1 (mirror)? It seems every hardware (and at least the software I tested a few years ago) RAID controller only supports a 2-way mirror.I recently tried to configure a 3ware 9650SE RAID controller. I selected all 3 drives. Then RAID 1 was not presented as an option. Only RAID 0 (striping, no redundancy) and RAID 5 (one level of redundancy, low performance). Is there some engineer who thinks "triple redundancy is a waste, so I'm not going to let them do that"? Or is it a manager?
Mirror RAID should be simple, even when more than 2 drives are used. The data is simply written in parallel to all the drives in the mirror set, and read from one of the drives (with load balancing over parallel and/or read-ahead operations to improve performance, though some of this is in question, too).
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Aug 16, 2011
I have IBM x3550 M3 machine with ServeRAID-M1015 on board. I set up RAID1 on machine and have question : 1. Is there some kind of software to manage hardware RAID from within operating system level? What I mean by saying "manage hardware RAID from oes level" is I would like to see status of disks in array, be able to initiate rebuild process and etc. This post doesn't relate software RAID only hardware RAID.
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Sep 1, 2010
I need to add the LSI drivers for the 9750 RAID controller during the install. These drivers are not included in 10.04 (or 10.04.1) and I need to install onto the RAID device I've created. LSI provides the drivers and instructions here - [URL]
Here are my steps, with the drivers on a USB drive -
Code:
Boot from the installation CD and select Install Ubuntu Server.
Press CTRL+ALT+F2 to switch to console 2 while Ubuntu detects the network.
# mkdir /mnt2 /3ware
# mount /dev/sda1 /mnt2
NOTE: LSI drivers are at /dev/sda1, via USB
# cp /mnt2/9750-server.tgz /3ware
# cd /3ware ; tar zxvf 9750-server.tgz
# umount /mnt2
* Remove the USB flash before insmod command *
# insmod /3ware/2.6.32-21-generic/3w-sas.ko
Press CTRL+ALT+F1 to return to the installer. Continue the installation as usual. Do not reboot when the installation is complete. Press CTRL+ALT+F2 to switch to console 2 again.
# cp /3ware/2.6.32-21-server/3w-sas.ko /target/lib/modules/2.6.32-21-server/kernel/drivers/scsi
# chroot /target
# /sbin/depmod -a 2.6.32-21-server
# update-initramfs -u -v
# exit
Press CTRL+ALT+F1 to return to the installer. Reboot to complete the installation. There are no errors, but after I reboot I just get "GRUB" in the upper left corner, nothing else.
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Jun 12, 2010
I bought a used server and it's in great working condition, but I've got a 2-part problem with the onboard raid controller. I don't have or use RAID and want to figure out how to stop or work around the onboard SATA raid controller. First some motherboard specs.: Arima HDAMA 40-CMO120-A800 [URL]... The 4-port integrated Serial ATA Integrated SiliconImage Sil3114 raid controller is the problem.
Problem 1: When I plug in my SATA server hard drive loaded with Slackware 12.2 and linux kernel 2.6.30.4, the onboard raid controller recognizes the one drive and allows the OS to boot. Slackware gets stuck looking for a raid array and stops at this point -........
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Nov 3, 2010
I'm trying to resize an NTFS partition on an IBM MT7977 Server. It has a Adaptec AIC-9580W RAID controller. I was thinking about doing it with a gparted LiveCD/LiveUSB, but then I realised that they won't have drivers for the RAID controller. A quick google for "9580W Linux" doesn't return anything promising.
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Aug 6, 2010
I was running 8.something on my ubuntu server. Today I decided to upgrade releases! So I started it, all via ssh cos the box is about 800 miles away and it was going just fine. However - I went away from the pc for about a hour, and my ssh session died. On reconnect it starts a new ssh session - and I dont know how to reconnect to the upgrade process and finish it off.
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