Fedora :: F13 - Boot With RAID1 / LVM / Dracut?
Dec 10, 2010
I am trying to boot my F13 server that has 3 partitions (sda2,sdb2,sdc2) configured as RAID1 (md0), vg00 is on md0 and / is on vg00/lvol00 and boot is on /dev/sda1, sda3,sdb3 and sdc3 contain other non-OS data and I get the following errors
dracut scanning devices sda3,sdb3,sdc3 for LVM logical volumes vg00/lvol00 vg00/lvol01
.
dracut: Volume group "vg00" not found
dracut: Skipping volume group vg00
dracut: Autoassembling MD Raid
No root device round
and then everything stops
If I go in with rdshell and type in -
[Code]...
Ok I managed to solve it. When I originally installed F13 I had 2 partitions in md0 and later on I added /dev/sdc2 to make it a 3 partition Raid 1 array. My thinking was seeing that I had the extra space it wouldn't hurt to use it as another mirror. One month later after I booted the server I have found out it did hurt. I removed the 3rd partition and now it's fine again. I wonder though if it would be possible though to use that 3rd partition.
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May 31, 2010
Having downloaded the DVD iso which failed to burn correctly I decided to try a live X86_64 iso, and installed from that. This was fine and I had set everything up apart from the nvidia drivers( nouveau worked but with no 3d for desktop effects). The card is a 7300LE and was working fine with kmod-nvida in F12. Following the instructions that leigh provides a howto for as usual I thought I would finish off the install. However I had several errors show up, which unfortuantely I did not keep a note of concerning dracut. On the restart the install was trashed, just froze solid in plymouth. Having been here before I decided that I would just do a complete reinstall again and investigate further what is going wrong later.
Having now a really nice slick F13 with all my servers set up etc and now running under nouveau I have just decided to check out dracut dependencies with the following: rpm -qR dracut-005-3.fc13
This gives:
Checking through the list of installed software I am unable to locate the following:
Though rpmlib is installed which may well be for the various rpmlib()'s above, I cannot see any package for fileutils,mktemp or mount in the repo's.
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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....
[Code]....
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Feb 7, 2010
My software RAID setup is as follows.
/dev/md0 (made from sda1 and sdb1) RAID1 /boot partition
/dev/md1 (made from sda2, sdb2, and sdc2) RAID5 / partition
Earlier on I had some trouble with my sda drive, it dropped itself from both arrays, screwing up the mirroring of my two raid partitions participating in the /boot partition. I eventually got everything sorted out and back in sync. (I also have grub installed to MBR on both sda and sdb). Things are working fine regarding that, but since then I've had this issue:
During boot up, I'll get an error message that it could not mount my /boot partition (when fstab is set to either /dev/md0 or the UUID). It claims c9ab814c-47ea-492d-a3be-1eaa88d53477 does not exist!
My fstab:
Code:
[mark@mark-box ~]$ cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Jan 20 16:34:41 2010
[code]....
As far as I know, it isn't neccessary for /boot to be mounted always, correct? Although, as I understand, I need to have it mounted whenever making kernel changes correct?
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May 17, 2010
I am self teaching everything I need to develop a home-based web server (linux/apache/php/mysql/html/css/etc...) It's quite an undertaking, but not beyond my abilities. I thought this question could have gone in either the linux - software or linux - hardware forum, and certainly not in the n00b section, but I figured it's best be put in the linux - server forum, since that's what this is related to.
I have been looking into the software and hardware RAID solutions for linux because I wanted to make sure that the boot drive of the web server I set up is mirrored with transparent disk fail/replace/recovery. I mean, setting up a boot drive for RAID1 sounded perfectly logical to me, and why wouldn't it to anybody else? So, since I knew RAID controllers were expensive, I looked into the native software RAID support in linux. My findings have revealed an issue with software raiding a boot drive in not only linux but windows as well. Apparently, if the primary drive fails (not the mirror), you have no other option but to power down the system to properly replace the failed disk, reboot, play some config crap, resync the drive, do some more config crap, reboot again, and -hopefully- it'll be ok. Well, that procedure is simply out of the question since the idea behind RAID is to transparently proceed as if nothing happened.
I'd like to know if it's even possible to RAID1 the boot drive for transparent and automatic fail/hot-swap/recover WITHOUT rebooting the system and with no intervention on my part other then replacing the drive whether it be a software raid or hardware raid solution. Eventually, what I'd like to do for a drive configuration is have 3 RAID volumes on the server configured like so:
RAID volume 1 = boot drive w/ webserver installed
RAID volume 2 = database files
RAID volume 3 = flatfile storage
Each raid volume will be a RAID1 of a 1TB drive (total = 6 x 1TB drives)
I've seen a lot of people having failure issues with the software RAID in these forums. Is this more common than not? I'm certainly not opposed to buying a hardware RAID solution as long as they're reliable and provide transparent/automatic recovery. So what's the best way to RAID1 the boot drive for transparent/automatic failover?
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Mar 2, 2010
I cleverly built a machine with two drives mirrored, boot partition on the mirror. It crashed some time when I was not present, and was apparently writing to disk at the time, for since, it will not boot. I get error messages to the effect that there is no boot partition. At this point I am not particularly concerned to try to rebuild this array, though I have read a hell of a lot on the boards about trying that (and am daunted - everyone assumes you can boot the machine with the bad array). Instead, I am wondering is it possible to build a simple machine on a third disk, then "look" at the disks in the former (?) array, and/or potentially rebuild it?
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Aug 11, 2010
intending to set up an all-in-one server, i threw in the ubuntu server 10.04 (amd64) cd. during the text-install, i set up the device-topology below, and it worked.
[Code]....
then i tested my raid by hot-pulling off the sda wire (ouch). worked fine, system still worked, and it also managed rebooting from the left sdb (which of course showed up being sda, lacking the first drive). now i am trying to recover this pre-crash state. adding the first disk (showing up as sdb), i can add it to md0 and let it start syncronizing for 2 hours. but... i can?t boot anymore with the recovered first disk being sda...
at first, booting got stuck in an initrd-prompt after complaining it couldn?t find my sys-logical volume. after a lot of trial and error i don?t even get any complaints, just a black screen which would let me wait for a boot for weeks... so, my system does not boot from my first disk, whether i plug in the second or not. my second disk still boots. my last attempt to get booting fine again has been: zero sda?s first and last gigabyte to kill any ids duplicate sdb?s first cylinder to sda to make it bootable reinitialize sdb?s part.table using command o in fdisk for a new disk-id recreate sda1 partition add sda1 to md0
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Apr 21, 2010
I installed a raid1 on a debian lenny box with only 1 drive "--raid-devices=1" because I didn't have the other drive yet. When I got the other drive, I used "mdadm --grow /dev/md0 --raid-devices=2" and "mdadm --manage /dev/md0 --add /dev/sdb1" The original drive is sda1. I watched /proc/mdstat until it was completely synced, and after a reboot, the system will not reassamble the raid. It fails with "mdadm: no devices found for /dev/md0" This is where root is, therefore, I get nowhere. From a rescue cd I can disable the other drive and shrink back down to 1 device and it boots fine.
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Jan 2, 2011
I created a raid1 disk with Disk Utilities on with Karmic, then upgraded my system to Lucid then Maverick. This Raid disk is just a data store, I'm not booting off of it. when I reboot the raid1 disk does not start. I have to go into Disk Utilities, stop the array and then start it. Then it comes up and I can mount it. I ran dpkg-reconfigure mdadm and it created a valid entry in mdadm.conf. but the array still does not start on boot. I want to have it auto mount with fstab but need to make sure the array starts first.
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Aug 9, 2010
Not sure on what is going on here. The server is RAID1 through hardware RAID. It was running an unusual high load so I rebooted it. Now it won't boot up. I am getting these errors after the CentOS boot screen:sda: Current [descriptor]: sense key: Medium ErrorAdd.Sense: Address mark not found for data field
end_request: I/O error, dev sda, sector 3040555357
device-mapper: raid1: A read failure occurred on a mirror device.
device-mapper: raid1: All sides of mirror have failed.
[code]....
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Nov 11, 2010
I just implemented dracut on my Slack. It works well, but for this also I had to rebuild the kernel. Everything works as it should beside KDM. When KDM start mouse/keyboard don't work. I check the logs and I don't actually see any errors.Note: Im using Slack in VirtualBox with fbdev or vesa driver and it doesn't work with neither of the drivers. I suppose its something missing in the kernel, but don't know what.Before rebuilding the kernel and implementing dracut, everything work with fbdev and/or vesa
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Jul 14, 2010
opensuse 11.2 64 bits installed in a RAID1 software array. Everything worked smooth during installation, the system boots, the mdx partitions are in their places, did the upgrades, configured the way i wanted, booted several times... all ok. Then i wanted to test the RAID and since its RAID1 i just disconnected 1 drive and started the computer. All what i got is
GRUB loading stage 1.5
GRUB loading, please wait...
Error 21
Connect the drive back and the system works ok.
Disconnect the other drive, then i got
GRUB loading stage 1.5
GRUB loading, pleas wait...
(hd1,0)/message: file not found
and a simple boot menu (in character mode) shows up with the 2 options SUSE LINUX and Failsafe -- SUSE LINUX (no version number)
[Code].....
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Feb 26, 2011
I have a raid1 setup on a machine. Recently it died and I thought one of the drives had failed as it was shooting errors. So I tried unplugging that drive get it to boot off the mirror but it seems the techs forgot to mirror the boot device so the 2nd drive can't boot on its own. After a while it was realized that the sata cable was in fact bad and replaced so now its working again.
However, this occurrence showed a flaw in the setup where the RAID1 isn't working as its supposed to. I would like to correct this. Can I somehow mirror the boot partition so the 2nd drive will boot independent? I'm not sure how I would go about this. This is a CentOS 5 installation.
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Jul 28, 2015
Recently tried to make RAID1 on MBR partitions scheme on Debian Jessie - debian-8.1.0-amd64-DVD-1. The issue - I have unable to boot from second drive after grub-install /dev/sdb by any ways. RAID1 itself for / swap and home is fully functional. Decided to try the same thing on GPT, same story. How to boot from second drive on most recent Debian Branches?
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May 3, 2011
Followed steps 2-5 and purged/reinstalled grub now it boots as it should, NO idea where it was messed up.[URL].. I had 9.10 running in raid1 and upgraded my hardware (cpu, mb, memory etc) and wanted to do a fresh install of 10.04 to get updated. After following the various guides online such as [URL]...It begins to load grub and drops to a "grub> " shell. Which I have to do the following to get it to boot.
Code:
set root=(md1)
linux /vmlinuz root=/dev/md1 ro
initrd /initrd.img
boot
Then it boots up normally and I can use it like any other desktop. I've been over my grub.cfg and /etc/defaut/grub files and cannot find the issue. At this point I'm wondering if the fact it's a raid1 setup is keeping grub from finding it's files.
[Code]...
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Dec 29, 2010
I have just upgraded to Fedora 14 from an older version. I now have problems mounting my RAID1 array, which was operating correctly until now. This is a software RAID which was initially built under Fedora 10.The array is md0, and is made of 2 SATA drives (sdc and sdd) which have only one partition. The underlying filesystem is NTFS. The array is assembled correctly and active, as reported by /proc/mdstat and mdadm -D.When I try to mount the array, I get this:
Code:
[root@Goofy ~]# mount /dev/md0 /mnt/raid
mount: you must specify the filesystem type
[code].....
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Jun 9, 2010
I have two 80 GB IDE hard disk. I have create raid1 partition in both drive using [URL] ink. raid is working fine. But i have copy some data on one hard disk (md0) but this data is not autometically copy in second hard disk(md1). I want when data is write on one hard disk, this data autometically write in second hard disk.
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Dec 7, 2010
Just finished installing F14 with RAID1 setup for 2 hdd (SATA''s). Entire drives are mirrored, including SWAP. As I had done in the past, I was planning on installing grub on MBR of 2nd hdd. In prep for this I did the following to locate the grub setup files:
grub> find /grub/stage1
find /grub/stage1
(hd0,1)
[code]....
I was surprised, expected to get (hd0,0) & (hd1,0), not (hd0,1) & (hd1,1)
running "fdisk -l" I get:
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes
[code]....
MBR is the first 512 bytes of the drive. Each partition has a boot sector. In my case grub stage 1 is on 2nd partition of sda & 2nd partition of sdb. What i dont understand is how grub stage 1 can be on sda2 & sdb2, since I am assuming that sda1 & sdb1 would be the first partitions of the drives & therefore contain the MBR's. Maybe this might be because sda1 & sdb1 are SWAP partitions?
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Jun 21, 2010
I have a i3 processor and MSI p55-cd53 motherboard. My problem is fedora cannot detect the 2nd SATA, so that I can configure raid1.
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Jan 6, 2011
I have the following configuration:
2xHDD 300GB RAID1 - OS part
2xHDD 1TB RAID1 - data part.
Both arrays were created inside the bios-like setup.
During the installation of fedora I "checkboxed" only the 300GB OS raid and used it for the installation. Everything is ok with it. After installation finished and I rebooted, I tried to initialize my second RAID1, that's 1TB - I was able, it was OK, I created 1 max-size filesystem there and put some data in it. After reboot this filesystem didn't want to mount for some reason - so I commented it in fstab and to my surprise, when I reached linux - the partition for it doesn't exist!!! Here is some data:
Code:
[root@localhost ~]# cat /proc/mdstat
Personalities : [raid1]
md125 : active (auto-read-only) raid1 sdc[1] sdd[0]
976759808 blocks super external:/md127/0 [2/2] [UU]
[Code]....
My guess would be that I am not fully and properly initializing the second array, (it's marked as auto read only in cat /proc/mdstat) but I'm not sure how to proceed.
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Jul 31, 2011
I have an existing Fedora 15 system installed from scratch.I've ordered a harddrive identical to my SDA and want to add it to my existing system as a RAID1 setup.I've googled around and cannot find recent clear instructions how to accomplish this. I don't want to reinstall everything from scratch. It should be possible to create the RAID1 using the existing data disk and then mirror everything up?
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively), swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead.
Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively) , swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead. Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Jun 25, 2010
I have been running Fedora 12 since its release without issue with a hardware RAID1 of two 1.5TB drives and a root volume of 500GB on a separate drive. Last night, after rebooting my machine, I was greeted with the following:Checking filesystemsfsck.ext4: Unable to resolve 'UUID=<snip>78' [FAILED]and the option of shell access as root. After logging in, I ran blkid with these results:
/dev/sda: TYPE="jmicron_raid_member"
/dev/sdb: TYPE="jmicron_raid_member"
/dev/sdc1: UUID="<snip>86" TYPE="ext4"
[code]...
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Apr 1, 2010
I'm building a NAS with xubuntu and I've put 2x1,5TB disks in RAID1 with mdadm. My question is really straightforward: do you have any advice for some special tuning/configuration for the RAID setup? Somewhere I read that I should disable disk caching, but I would like to have some more opinions.
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Oct 27, 2010
I have a hypothetical situation in which I installed my operating system using a RAID1 mirror. At some point I decided that this setup was overkill, my machine isn't system critical, I value doubling my storage space more than speedy recovery, I'm doing routine backups, etc...
Short of backing up my system volume and repartitioning, or otherwise starting over, is there a way I can reconfigure my RAID1 array to only expect one disk so that mdadm no longer reports a Degraded state?
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Feb 15, 2010
I tried setting up my own partition table which apparently didn't go well.I have 1 compactflash-disk for linux and 2 hard drives for data which are set up for RAID1. But the RAID-drives doesn't get mounted.This is my first RAID-setup
Code:
me@server:~$ df -h
Filesystem Size Used Avail Use% Mounted on
[code]...
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Dec 23, 2010
I have two disks from a old computer (now it doesn't exist anymore). They were in raid 1 with this configuration:
Code:
----------------
| disk 1 | disk 2
----------------
| OS
----------------
| |
| raid 1 | raid 1
| |
----------------
There is probably an error in one of the two disks, however raid 1 should allow we to restore data. So now I can physically mount this disks on a machine with ubuntu (ubuntu is on another disk). My question is: how can I restore data from disks? I think that using mdadm is not enough.
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Jan 13, 2011
I recently followed this guide to create a RAID1 [URL]... First I partitioned the disks with fdisk. I made the RAID array with
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1. Then I created the filesystem with mkfs.ext3 /dev/md0.
I then mounted md0 at /Video with mount /dev/md0 /Video/ All according to the guide.. Today I made a samba-share out of /Video/Rorschach to easily put files in there from my windows7-machine (the plan is to steam from my CentOS-server to my HTPC which hasn't arrived yet). I started to put movies in there. It went just fine for a while but then I got this message: [URL]... How is that even possible when df -h looks like this?:
[code]...
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Nov 23, 2009
due to OS boot related issues, i want to do a file copy in the pre-boot environment. unfortunately Knoppix cannot help out. it does not recognise onboard raid1 (sata drives). the system in question is ibm eserver 306.
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