Fedora Installation :: Building RAID Drivers For 10?
Jan 22, 2009
I want to install Fedora 10 but need to build RAID (bcraid) drivers so the installation will see my RAID array. I'm currently running Fedora 6 & thought this would be the process:
1) Install kernel source
2) Modify configuration to include bcraid drivers.
3) Build new kernel
4) Replace kernel in standard build with custom kernel or load driver during installlation
5) Install Fedora 10
I'm stuck on no. 1. When I tried to install the kernel source, there was some problem with "mockbuild" (wot dat?) which I think was a red herring but I now don't know what to do about these unsatisfied dependencies:
[root@fedora6 ~]# rpm -Vp ~/Desktop/kernel-2.6.27.5-117.fc10.src.rpm
warning: /home/nick/Desktop/kernel-2.6.27.5-117.fc10.src.rpm: Header V3 DSA signature: NOKEY, key ID 4ebfc273
Unsatisfied dependencies for kernel-2.6.27.5-117.fc10.src: rpm-build >= 4.4.2.1-4
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Aug 6, 2009
For a new project at work, I'm looking into building a processing farm of a few dozen Tesla 1U servers from Nvidia. This has lead us on to figure a way to let the developers run tests on their own workstations (with the appropriate gfx card).The cards we're looking at are Quadro FX 1800 or 3800's to provide quite a bit of poke.
Thing is, I'm having issues with running any Cuda code successfully on systems installed with the pre-built nvidia drivers from RPMFusion. I can only get code running if I download the nvidia or cuda drivers from nvidia and install by hand. Not something I'd like to be maintaining across all out developer workstations. Is anyone out there running Cuda on Fedora/RHEL5 platform? If so, are you using RPM nvidia drivers or building them by hand?
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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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Jul 6, 2011
I've been running my dedicated server on Ubuntu 10.04 for 300 days non-stop so far (touch wood). I'm planning to purchase a dedicated server to host many large sites. The specs are Sandybridge Xeon with 16 bay x 2TB storage using RAID5 (Adaptec RAID 51645).I don't have experience with RAID, but I read that ext4 can only support filesystem up to 16TB, my plan for the system is to have 32TB of storage. How can I make Ubuntu run this configuration?
Also, can Ubuntu 10.04 recognize the Adaptec card? Going through Adaptec website there is no mention of drivers for Ubuntu (although many other distros are available).
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Jul 6, 2011
I'm looking at building a small NAS setup for my home to hold all my media (DVD's, pictures, music etc..). I'm not too concerned with backups of it at this point as I have all the data elsewhere as it is, but would like one central spot to access it.
A friend of mine turned me on to Ubuntu to do this with but he's never tried it, so I'm looking to see if anyone else has done this or if there issues with it. I've used linux off and on for several years, but this would be my first Ubuntu install.
I'm looking at either using some older hardware I have sitting around, or something cheap like a small dell server (T310 or something). I'd get 4 2TB drives and just use them in a software raid 5 array. It would be accessed with a few different samba shares I'm thinking.
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Jan 6, 2010
I'm building a NAS, based on the Intel SS4200. There are 4 drive bays in the machine for use with SATA disks, two of which I plan on filling now, the other two which I plan on filling later. The box also includes an IDE connector to which I will connect an 8GB Disk on Module onto which I will install Slackware. I wish to have all drives in the box show up as one contiguous volume. What partitioning/LVM/RAID configuration can I use which will allow me to:
1. Add a disk and transparently grow the available space of the volume?
2. Replace a disk with a larger disk and transparently grow the available space of the volume?
3. Lose a disk to hardware failure and replace it with a new one with no data loss?
If I use RAID 5, I'm pretty certain I can get numbers 1 and 3 above, but I'm not sure about number 2. The downside is that I'd have to start with 3 disks in the machine, and I'm unsure if adding a 4th disk whose size is larger than each of the 3 starting disks would lead to wasted space. For instance, if I start with three 1TB drives in RAID 5, and then add a 2TB 4th drive, would my available size go from 2TB to 3TB? Or from 2TB to 3.xTB?
Is it important in a RAID 5 setup to have all disks the same size? With LVM, I can certainly get number 1 above, but what about 2 and 3? I know you can use LVM to present many disks or partitions as one contiguous volume, but if I have two 1TB drives in one volume, and only have 300GB of data, then would the second drive remain empty until I broke the 1TB barrier? In this case, it's wasted space from the get go. I suppose another option would be to start with RAID 1 until I can afford a third disk.
When adding the new disk, could I switch to RAID 5 without data loss? I'm planning on maintaining a full mirror of the NAS on some USB disks as a backup, so if configuration changes to the NAS require wiping the disks and restoring from backup, it's not a total loss. However, it certainly makes me nervous to be in a state where only one copy of the data exists, so I'd rather find a solution where I can add and upgrade disks in the NAS without relying on the backup copies.
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Aug 3, 2010
I have an intel server board s5000vsa and would like to install fedora 12 on intel embedded raid 5 (fake raid). Have already read some stuff about it and found megasr driver, which seems to be used in rhel 5. I also managed to compile this driver and load it into the running kernel of the other F12 installation. Afterwards, I created new initramfs by issuing: dracut --add-drivers megasr <file>
when this intramfs boots and raid is set in bios, fedora 12 boots from /dev/dm-1. however, the driver loaded is ahci and *not* megasr (therefore only raid 1 works) How can I create initramfs that will load megasr at startup and not ahci? Preferably with dracut....
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Oct 13, 2010
I received some errors while running a benchmarking script to determine my ideal raid chunk size. There are several errors in the kernel log regarding the sata link and eventually the two drives i have connected to a pci express x1 sata card were no longer present in /dev/
the script i was using is available here [URL]..system specs 1 500gb western digital drive (system drive)3 2tb samsung f4 drives (2 connected to pci x1 card (sata II) and 1 onto onboard sata port (sata I)) single core amd 64 on SiS chipset debian 64bit testing
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I rebooted the machine and everything appears to be happy. What do these errors mean? What steps should i take to prevent them in the future so it doesn't end up corrupting the array?
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Dec 4, 2010
I've been trying to create a RAID5 array with 4x1TB disks.
I'm using Ubuntu 10.10, uname output:
Quote:
Linux dynamips 2.6.35-22-server #33-Ubuntu SMP Sun Sep 19 20:48:58 UTC 2010 x86_64 GNU/Linux
I have two of them connected to the on board ICH7 SATA controller (sdb and sdc), and two of them connected to an external Silicon Image SiI 3132 controller (sdd and sde). sda is my boot disk split into several partitions and is also connected to the onboard SATA.
Everything is working fine before I create the array, here are my hdparm outputs:
Quote:
/dev/sdb:
Timing cached reads: 2958 MB in 2.00 seconds = 1478.89 MB/sec
Timing buffered disk reads: 360 MB in 3.02 seconds = 119.35 MB/sec
/dev/sdc:
Timing cached reads: 2940 MB in 2.00 seconds = 1469.77 MB/sec
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Mar 1, 2011
Installing Ubuntu 10.10 desktop.on a Highpoint rocketraid 2642.Installing Ubuntu, it does not find the drive?How do I install the drivers to install and boot after the installation from the raid drives?
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Jun 6, 2010
After many days of messing around with various versions of drivers and tools, and building the drivers and tools from scratch and too many pages purporting to help get this tablet running, big breath, I have some advice. As the very first thing to check you need to look at /var/log/xorg.0.log. If the file wacom_drv.so loads you'll see:
(II) LoadModule: "wacom"
(II) Loading /usr/lib/xorg/modules//input/wacom_drv.so
(II) Module wacom: vendor="X.Org Foundation"
compiled for 1.6.5, module version = 1.0.0
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 4.0
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Jan 31, 2009
While building my new server I grinded ta hold shortly after inserting the FDR10 DVD.
Hardware:
Chenbro es34069
Albatron KI690-AM2
AMD Athlon X2 64 4850E
IDE 2.5" HD (master)
IDE Slimline DVD (slave)
4x SATA II swap (still empty)
It stops at the message "net: Registered protocol family 2" but in one of my desperate attempts I changed almost every setting in my BIOS (updated to 1.07) and all of a sudden it passed on. Stupid enough I figured it would be a small effort to find the setting and figure out the problem, so I changed them one at a time after loading the defaults....
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May 29, 2015
I have some servers... more than 30 (different brands: HP, IBM, Supermicro, Fujitsu, etc).
I wonder if there would be some way (and how to do it) to load the RAID drivers in Debian Live 7.8.0 without installing it?
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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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Jun 24, 2009
I've tried to install Fedora 11, both 32 and 64 on my main machine.It could not install as it stops on the first install window. I've already filed a bug but really haven't seen any feed back yet.The bug has something to do with Anaconda and the Raid array but I really can't tell.
I have an Intel Board (see signature). I am running intel raid software under W7 currently.It works fine. But, I'm wondering, when I attempt to install F!!, is my current raid set-up causing problems? Do I need to get rid of the intel raid software and use a Fedor/Linux raid program to manage the raid array??
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Feb 3, 2011
I have got a server which has a motherboard with nvidia mediashield raid built in, with Centos installed it picked up the raid 5 array that i had configured as one drive so the os install was straight forward. When i booted the netinstaller of opensuse 11.3 run though the setup, when getting to the partition setup is was picking up the three hdd as seperate drives and not one, so i got to a certain point and aborted the installation and i re run the installer, the raid status said the array was degarded or something which i knew there was nothing wrong with it as i had set it up only about 2 weeks ago and there was one drive missing aswell. So i removed the array and re configured the array and rebooted and the raid status said healthy again as it was before on centos, then i run the opensuse installer again and it went though the process again but completely stop at "Searching for linux partitions" , cursor was working fine , but nothing else was so i had to press reset.
This was my problem, i know kind of what the problem is, but what i want to know is , i thought opensuse is based on rhel same as centos but how comes centos has the drivers for the raid chip i have in my board and opensuse has not.
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Aug 2, 2010
I ve got a SATA HDD which I use for storage connected to a (now quite old) RAID PCI card (HighPoint Rocket RAID 1520). Ive added another (blank) HDD, same brand and size to the PCI card. Ubuntu (10.04) can see both hard drives and access data. Id like to mirror (raid 1?) these HDDs. Looking around this forum Ive noticed quite a few people mentioning FakeRAID. Turns out that's not quite the same as software RAID. Given how cheap the 1520 was, I suspect it's FakeRAID rather than Hardware. Perhaps someone can confirm? Given Ubuntu can see both HDDs, would this mean it ll have the correct drivers to work with a hardware/fake raid? A common recommendation is to use mdadm to create a software RAID. How does this work for partitions accessed from multiple Operating Systems including Windows XP?
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Aug 12, 2010
Trying to install drivers for Highpoint Technology's RR2310 RAID card as a data driveFollowing the simple instructions from HT seems to go well. Typeingsudo sh .install.shreturns:The disk you insert is for linux kernel 2.6Update initrd file /boot/initrd.img-2.6.28-11-generic for 2.6.28-11-genericPlease reboot the system to use the new driver module.When I reboot things are as before: no array; the individual drives are fdisked as singles with no partition table.When I check uname -r, I see the Ubuntu 9.04 kernel is 2.6.31-19-generic.In /boot there are initrd files 2.6.28... 11, 15, 16, & 17 and 2.6.31... 16, 17, 19 & 22.The card BIOS shows the array is 'NORMAL' and lspci shows it also
00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2)
00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3)
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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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Sep 2, 2010
So I decided to build a server using two HDDs and after checking the net I decided to go with Software RAID.Before I mess around and go ahead and buy two 500 GB HDD, I decided to try it out first in virtual box.(my system is F13 64bit with 4GB)
I set up a virtual machine with 2 X 10GB HDD.Mount the live CD (f13 32bit).Run regular install > choose custom layout and do as follows: SDA & SDB will both have Software RAID 500 MB and another software RAID of about 9500 MB I will have md0 /boot (sda1 & sda2 = 500 MB) And another md0 having LVM group loaded with / + SWAP I choose to install boot loader on md0 the first time and I receive the following error when I boot from HDD: FATAL: INT18: BOOT FAILURE I tried installing boot loader on sda same thing.
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Feb 5, 2010
I forced my workplace to forgo windows and opt for linux for web and mail server. I'm setting up Centos 5.4 on it and I ran into a problem. The server machine is a HP Proliant DL120 G5 (quad core processor, 4GB Ram, two SATA drives, 150GB each attached to the hardware RAID Controller on board). RAID is enabled in the BIOS.I pop in the Centos disk and go through the installation process.
When I get to the stage where I partition my hard drive,it is showing one hard drive, not as traditional sda.but as mapper/ddf1_4035305a86a354a45.I looked around and figured that I need to give Centos the raid drivers. I downloaded it from:
[URL]
I follow the instructions and download the aarahci-1.4.17015-1.rhel5.i686.dd.gz file and unzipped it using gunzip. Then on another nix system, i do this:
dd if=aarahci-1.4.17015-1.rhel5.i686.dd of=/dev/sdb bs=1440k Note that I am using a usb floppy drive, hence the sdb. After that, during centos setup, i type: linux updates dd
It asks me where the driver is located. I tell it and the installation continues in the graphical mode. But I still get mapper/ddf1_4035305a86.a354a45 as my drive. I tried to continue to install centos on it. It was successfull but when i do a "df -h" it gives me /dev/mapper/ddf1_4035305a86......a354a45p1 as /boot
/dev/mapper/ddf1_4035305a86......a354a45p2 as /
/dev/mapper/ddf1_4035305a86......a354a45p3 as /var
/dev/mapper/ddf1_4035305a86......a354a45p4 as /external
/dev/mapper/ddf1_4035305a86......a354a45p5 as /swap
/dev/mapper/ddf1_4035305a86......a354a45p6 as /home
Well i know why it's giving these, because i set it up that way, but i was hoping it would somehow change to the normal /dev/sda, /dev/sdb. That means that the driver i provided did not work. I have another IBM server (5U) with raid scsi drive and it shows the usual /dev/sda. It also has hardware raid. So i know that there is something wrong with the /dev/mapper/ddf1_4035305a86......a354a45p1 format.
First, is there any way that I can put the aarahci-1.4.17015-1.rhel5.i686.dd (floppy image) on a CD?. I really need to set this up with raid. I know i could simply disable raid in bios and then i would get two normal hard drives sda and sdb. But it has to be a raid setup. Any way to slipstream the driver into the centos dvd? The hp link i provided above, under installation instructions, there are some instructions titled "Important". But I couldn't get it to work.
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Nov 18, 2009
I just tried to install Fedora 12 x_64 on a machine that is currently running Fedora 11 x_64. It's a new machine for use as a server and is running a Phenom II 4 core on a gigabyte M/B - 4GB RAM, onboard ATI graphics, an Adaptec 5405Z RAID Controller that is in the 16 lane PCIe slot, and 3 SSD SATA dives in a RAID 0.I installed Fedora 11 x_64 on this machine just last week and it went perfectly smooth. The install recognized the video hardware, controller card and the RAID, installed correctly, boots fine, runs solid.When I attempt to install Fedora 12 x_64 on the same machine, it does NOT recognize the controller, nor the RAID and doesn't seem to like the video hardware. I stuck on a floppy drive and made a driver disk from the Adaptec provided Linux drivers, but the install fails to mount the floppy when I try to add the driver during boot from DVD - although it tries. (It's possible that my floppy drive and/or disks are too old to be useful. Seriously, loading drivers from a FLOPPY? Most computers don't even HAVE one any more.Sheesh...). The video also seems squirrelly and works better using the "simple" video drivers.
Anyone got any clues on this. It seems odd that the newer version works less well than the previous one.Maybe I'll try a different .iso - CDs or a live version or something just to check - and maybe try an install on a different machine. Yes, I put the install DVD through the self-test and it passed. I have tried 2 different copies and both fail.LATER - tried with live CD - boots OK, splash screen is OK, after bootup finishes it looks like maybe it's trying to start a different video driver - then the screen goes black and stays that way. Tomorrow I may stick in a discrete video card and see if that makes any difference.
Still Later: I have tried discrete video card, tried moving the RAID controller to the 4 lane slot, tried to install a driver from floppy (still no go) and have tried noprobe on boot command line. Although the "noprobe" got the video to keep going (albeit at a low resolution) it STILL refuses to see the RAID controller. The LED indicators on the RAID card SEEM to be indicating that the card locks up during Fedora 12 boot, but I haven't checked on that just yet. Fedora 11 continues to boot and run fine on the same machine - I'm running it right now. as I type this.Later yet: Ubuntu 9.10 86_64 that was released a couple weeks ago DOES, IN FACT see the controller and the RAID when I run the install process. Looks like Fedora 12 is badly broken after all. (Damn those even numbered releases anyway.....{;>D)=) Guess I'm going to be "stuck" with either Ubuntu or Fedora 11 unless a solution appears pretty soon. I have sent an inquiry to Adaptec, but I'm guessing they are going to say, "we don't support Fedora linux except Fedora 5 and Fedora 6" as those are the only drivers they seem to have available
Friday 11/20 - I've attached a SATA drive to the same computer. By using the "basic" video driver from the install DVD I am able to install F12 to the SATA drive without issue - it installs fine, boots fine, runs fine. However, it still will NOT see the RAID controller. I tried installing the driver .rpm from the disk that came from Adaptec, but the vanilla linux driver doesn't seem to be effective. So far, Fedora 12 continues to be a big FAIL! as far as this particular machine goes.
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Jun 3, 2010
I have a spare machine running Windows 7 Pro x64 in RAID 0 (software RAID). I would like to install Fedora 13 x64 on a dedicated SATA HD (non-RAID) already in the machine but I'm unsure how Fedora's boot-loader will react to the RAID 0.
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Aug 11, 2009
I've been trying to setup RAID 10 with Fedora 11 on my desktop using this tutorial:[URL].. Everything has been going well, except when following the instructions and getting ready to format, it says I need to define / and boot partitions. This was never included in the instructions.
- LVM Volume Gropus
-- vg_jordan
--- fedoraRAID (type: ext4)
- RAID Devices
-- /dev/md0 (mountpoint/RAID/volume: vg_jordan ; type: LVM)
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Jan 5, 2010
As I understand, Fedora 12 sets up Intel ICH (when set in BIOS) as mdraid instead of dmraid.I would like to setup my 2 SATA hard drives so ultimately my /boot partition is RAID1, my / (ROOT) partition is RAID 1, and my swap is either RAID0, or fstab referencing 2 partitions on 2 of the drives, both set with pri=0 (which supposedly is equivalent to striping of RAID0, performance wise).
Assuming Fedora 12 uses mdraid for my configuration in either instance, am I better of enabling, or disabling the RAID mode in the BIOS? This system is strictly Fedora--no dual booting, no Windows. Any performance gains; reliability benefits between either scenario?It's a Intel P35 motherboard with ICH9R. Storage configuration is either "AHCI" or "RAID"
I ran into some strange issues with dropping drives with the RAID set on in BIOS. When it was set, that gave me two md devices of md126 (RAID0, swap) and 127 (RAID1 split between / and /boot). I think I had md126p1 for the SWAP, and md127p1 for /boot and md127p2 for / Within purely software, i have:
/dev/sda1 RAID
/dev/sda2 swap
/dev/sda3 RAID
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I suppose unless the BIOS enabled RAID is supposed to be faster, I'll stick with a purely software route and keep the BIOS set to AHCI.
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Mar 23, 2010
I've been using Fedora and Ubuntu on a standard PC/laptop (one HDD) for some time, but just as a user. Recently I built a PC with Asus P5K WS motherboard with RAID adapter on board. I've got 5 750GB SATA drives, however hardware restrictions only allows me to create Logical Volume up to 2TB. SO I've created RAID 5 on 3 drives as SysVol and RAID0 on 2 drives for data.
Ran live CD and started to install OS. However I get to point, when system scans for storage devices. It detects smaller volume, but not the SysVol, I want to install the system on. It is offering me to install system on the smaller volume. I've deleted the smaller volume and left one RAID 5 volume and 2 drives. Again the same problem. System detects those 2 drives, but not the volume.
Is there any restriction in Fedora 12 allowing installation on certain LV? Or is it more HW problem?
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Jan 26, 2011
I am doing a new install and have 4 drives (2x500Gb and 2x2Tb). What I want is the OS on the 2x500Gb and the data on the 2Tb drives. The idea is to make the 500's one RAID 1 set and the 2Tb a RAID 1 set. I think the installer is trying to build the RAID set for the OS but the root is looking like a RAID 0 rather than 1. Is there some way to specify?
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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]
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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 9, 2009
I upgraded from F10 to F12 using preupgrade. The upgrade itself completed with no errors, but I'm unable to boot afterward.
Symptoms:...Grub starts, the initramfs loads, and the system begins to boot. After a few seconds I get error messages for buffer i/o errors on blocks 0-3 on certain dm devices (usually dm0 and dm2, but I can't get a shell to figure out what those are). An error appears from device-mapper that it couldn't read an LVM snapshot's metadata. I get the message to press "I" for interactive startup. UDEV loads and the system tries to mount all filesystems. Errors appear stating that it couldn't mount various LVM partitions. Startup fails due to the mount failure, the system reboots, and the steps repeat.
Troubleshooting done:...I have tried to run preupgrade again (the entry is still in my grub.conf file). The upgrade environment boots, but it fails to find the LVM devices and gives me a question to name my machine just like for a fresh install. I also tried booting from the full install DVD, but I get the same effect. Suspecting that the XFS drivers weren't being included, I have run dracut to create a new initramfs, making sure the XFS module was included. I have loaded the preupgrade environment and stopped at the initial GUI splash screen to get to a shell prompt. From there I can successfully assemble the raid arrays, activate the volume group, and mount all volumes -- all my data is still intact (yay!). I've run lvdisplay to check the LVM volumes, and most (all?) appear to have different UUIDs than what was in /etc/fstab before the upgrade -- not sure if preupgrade or a new LVM package somehow changed the UUIDs. I have modified my root partition's /etc/fstab to try calling the LVM volumes by name instead of UUID, but the problem persists (I also make sure to update the initramfs as well). From the device-mapper and I/O errors above, I suspect that either RAID or LVM aren't starting up properly, especially since prior OS upgrades had problems recognizing RAID/LVM combinations (it happened so regularly that I wrote a script so I could do a mkinitrd with the proper options running under SystemRescueCD with each upgrade).
I have tried booting with combinations of the rootfstype, rdinfo, rdshell, and rdinitdebug parameters, but the error happens so early in the startup process that the messages quickly scroll by and I just end up rebooting.
System details:4 1-TB drives set up in two RAID 1 pairs. FAT32 /boot partition RAIDed on the first drive pair. Two LVM partitions -- one RAIDed on the second drive pair and one on the remainder of the first drive pair. Root and other filesystems are in LVM; most (including /) are formatted in XFS.
I've made some progress in diagnosing the issue. The failure is happening because the third RAID array (md2) isn't being assembled at startup. That array contains the second physical volume in the LVM volume group, so if it doesn't start then several mount points can't be found.
The RAID array is listed in my /etc/mdadm.conf file and identified by its UUID but the Fedora 12 installer won't detect it by default. Booting the DVD in rescue mode does allow the filesystems to be detected and mounted, but the RAID device is set to be /dev/md127 instead of /dev/md2.
The arrays are on an MSI P35 motherboard (Intel ICH9R SATA chipset) but I'm using LInux software RAID. The motherboard is configured for AHCI only. This all worked correctly in Fedora 10.
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