Ubuntu Installation :: Upgrade To 9.10 Failed; Can't Boot And Have Encrypted RAID Disk?
Feb 23, 2010
I was running Ubuntu 9.04 Desktop on a headless Pentium 4 machine which is our file, mail, web & fax server. The two x 250GB SATA hard disks were in a RAID 1 array with full disk encryption. Ran the 9.10 upgrade via WEBMIN and it failed. I should have known then to copy over everything to a backup disk, but instead I rebooted.
On restart the machine accepted my encryption passphrase but promptly hung with a mountall symbol lookup error - code 127. So I can't start the machine to get at the disks, and using a Live CD is useless as it has no way to open the RAID array to get at the encrypted partitions. Although we have data backed up (as at last night) I'd hoped not to have to rebuild the entire server from scratch. But its looking bad.I have taken one drive out and plugged it into another machine (Hercules), and the partitions show up as /dev/sdb1 /dev/sdb2 /dev/sdb3.
If it weren't for RAID, I could open /dev/sdb2 the main partition) in Disk Utility and enter my encryption passphrase to get access. But RAID adds a layer of obstruction that I have not yet overcome. I used mdadm to scan the above partitions and created the /etc/mdadm.conf file, which I edited to show the 2nd drive as missing (rather than risk corrupting both drives). I activated the RAID array with mdadm, and cat shows:
Code:
root@HERCULES# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sdb3[0]
1815232 blocks [2/1] [U_]
[Code]...
I've been searching the web for hours but have yet to find someone with a solution to this situation. If anyone has a thought on how to access this disk I'd be pleased to hear from you. In the meantime I will start building a new (9.10) machine from scratch, without RAID, 'cos that's probably going to be necessary.
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Oct 4, 2009
I just upgraded my F9 system to F10 using they preupgrade method, and though nothing seems to have failed during the upgrade I can't boot my system any longer.I have a completly encrypted system, and so I need to enter a passphrase at boot. The new F10 system does boot and I do get a Password: prompt but the passphrase is not accepted.My passphrase doesn't contain any odd characters to prevent problems with keyboard mappings. Just plain letters (upper and lower case) and digits
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Nov 3, 2015
I installed Debian on my PC with a Acer Stock motherboard (xc600) with amd64 and after the installation finished it told me to remove my installation media and reboot. After reboot I was returned this message ' ERROR: No boot disk has been detected or the disk has failed.'. I have verified with gparted using mint live OS that I have Debian installed on my system.
I got believes that this may have be caused by a broken grub or I need to configure something I don't know how in BIOS.
I will update the topic later..
My installation media was a USB 2.0 flashdrive with a Debian 8.2 Jessie Installer and 9 different Linux distros. I have installed Debian multiple times before on my laptop and never had this problem so I know how to go through the installation process and set the partitions.
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Feb 11, 2011
I have 2 identical disks originally configured as a pair for a server. Each of the disks has 2 partitions dev/sdb1,dev/sdb2. The sdb1 partitions I had configured as a raid1 mirror. The sdb2 partitions were non-raid and used as extra misc. Space. Further, the raid setup is also encrypted using dm-crypt luks. Now I want to redeploy each of the disks for new purposes. One of the disks i want to deploy exactly as before (keeping the partitions and content), however without being part of a raid array.
I've successfully deployed this disk into a new system and I am mounting the dev/sdb1 partition as dev/md0 because the disk is set to autodetect raid. Actually I am using cryptsetup and mounting with mapper. Can I get rid of the setting for auto detect on this partition without losing the data, or breaking the encryption? I just want to mount the partition as a standalone encrypted disk. Is it as simple as doing crypt setup luksOpen /dev/sdb1 then mounting it with mapper? Or do I need to change the partition in some way. Or do I simply continue to operate it as a 'broken' raid array?
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Oct 20, 2010
I downloaded the Fedora live dvd iso file, burned it to a dvd. I was wondering if I forgot to do something or did I do something wrong. When I try to install from the dvd I get this error message, isoLinux: Disk error 80 , AX = 42A7 , drive 9F Boot Failed: press key to retry When I press a key to retry I get the same error. I also tried to install virtual pc and get not boot disk found.
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Sep 3, 2010
I tried installing Ubuntu 10.04 WS on my PC but it did not see any disks to install on. I believe this is because my drives are all configured as RAID. My mobo is an Asus M3A78-EMH HDMI AM2+ socket with an Athlon 2X 5000+ CPU. The chipset is AMD 780G. I have the BIOS configured for RAID drives and I already run Win XP x32 and Win 7 x64 on it. My boot drive is configured as 'RAID READY' and I have 2 RAID 1 disks consisting of pairs of SATA drives.
From what I have researched it seems that with some tuning it should be possible to install Ubuntu 10.04 but I have little Linux experience and don't want to mess up my existing drives. I have installed Linux before a few times and run it but never with RAID. Is anyone aware of an existing disk image that I will be able to install from on my system or would it be possible for someone to create one for me to use?
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Apr 13, 2010
I installed Fedora 12 and performed the normal updates. Now I can't reboot and get the following console error message.
ERROR: via: wrong # of devices in RAID set "via_cbcff jdief" [1/2] on /dev/sda
ERROR: removing inconsistent RAID set "via_cbcff jdief"
ERROR: no RAID set found
No root device found
Boot has failed, sleeping forever.
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Sep 1, 2010
I had a a problem booting last night when my laptop battery came loose and caused a crash during boot.It ceased loading a daemon and I turned it off with the power switch, then I received the boot error,then i checked the linuxdrives directory and it was corrupt,I then, out of ignorance, ran wubi from within windows XP and said unistall believing that it would reinstall and fix itself.Thus you can see my green behaviour.I have been searching the threads and have tried many things but have had no success, I will suffer a great loss if I lose that load of Ubuntu as I have allot of work stored there, and in my Thunderbird accounts.
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Dec 2, 2010
I upgraded my Dell T3500 from lucid64 to maverick64. The system cannot boot the current image becuase it gives up waiting for root device. it gives something like:
Code: ---udevd-work[175]: '/sbin/modprobe -bv pci: v00008086d00002822sv00001028s00000293bc01sc04i00' unexpected exit with status 0x0009 ALRT! /dev/mapper/isw_bbfcjjefaj_ARRAY01 does not exist. dropping to a shell! at which point it drops to busybox at the (initramfs) prompt. I cannot boot this kernel in either normal or recovery mode (ubuntu 10.10, Kernel 2.6.35-23-generic)
however, if I select the previous kernel in grub, (2.6.32-26) it will boot fine. This is my main production machine and it hosts my Project Management software for my team.
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Sep 19, 2014
I am running a 14 disk RAID 6 on mdadm behind 2 LSI SAS2008's in JBOD mode (no HW raid) on Debian 7 in BIOS legacy mode.
Grub2 is dropping to a rescue shell complaining that "no such device" exists for "mduuid/b1c40379914e5d18dddb893b4dc5a28f".
Output from mdadm:
Code: Select all # mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Nov 7 17:06:02 2012
Raid Level : raid6
Array Size : 35160446976 (33531.62 GiB 36004.30 GB)
Used Dev Size : 2930037248 (2794.30 GiB 3000.36 GB)
Raid Devices : 14
[Code] ....
Output from blkid:
Code: Select all # blkid
/dev/md0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/md/0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/sdd2: UUID="b1c40379-914e-5d18-dddb-893b4dc5a28f" UUID_SUB="09a00673-c9c1-dc15-b792-f0226016a8a6" LABEL="media:0" TYPE="linux_raid_member"
[Code] ....
The UUID for md0 is `2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` so I do not understand why grub insists on looking for `b1c40379914e5d18dddb893b4dc5a28f`.
**Here is the output from `bootinfoscript` 0.61. This contains alot of detailed information, and I couldn't find anything wrong with any of it: [URL] .....
During the grub rescue an `ls` shows the member disks and also shows `(md/0)` but if I try an `ls (md/0)` I get an unknown disk error. Trying an `ls` on any member device results in unknown filesystem. The filesystem on the md0 is XFS, and I assume the unknown filesystem is normal if its trying to read an individual disk instead of md0.
I have come close to losing my mind over this, I've tried uninstalling and reinstalling grub numerous times, `update-initramfs -u -k all` numerous times, `update-grub` numerous times, `grub-install` numerous times to all member disks without error, etc.
I even tried manually editing `grub.cfg` to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `(md/0)` and then re-install grub, but the exact same error of no such device mduuid/b1c40379914e5d18dddb893b4dc5a28f still happened.
[URL] ....
One thing I noticed is it is only showing half the disks. I am not sure if this matters or is important or not, but one theory would be because there are two LSI cards physically in the machine.
This last screenshot was shown after I specifically altered grub.cfg to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `mduuid/2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` and then re-ran grub-install on all member drives. Where it is getting this old b1c* address I have no clue.
I even tried installing a SATA drive on /dev/sda, outside of the array, and installing grub on it and booting from it. Still, same identical error.
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May 9, 2011
I tried to upgrade my Ubuntu 10.10 to 11.04 on my netbook. I choose the option to upgrade on the Update Manager. All packages had been downloaded, and the installer was busy to replace all the old packages.
During the update I noticed that my internet stopped working, so I disabled my wifi, so it couldn't interupt the upgrade. After a half an hour, I found out my internet worked again, so I pressed the wifi-button again on my laptop, so the wifi would turn on, but after that move my screen hanged, and the upgrade wasn't done yet. I pressed the powerbutton for 5 seconds, because there was nothing else I could do.. Everything just hanged, no mouse movement, no hard disk activities, just a frozen screen.
After this problem I rebooted, and I already knew what I was going to see, Ubuntu couldn't be loaded anymore (and it still can't).
Is there anybody who can help me to restore my laptop? There are really important things for college on the harddisk in the /home/ folder, but I was too stupid to forget to make a backup.. I mostly make backups of everything you can think of, but I thought it won't be neccessary.. damn..
I know that you can restore files using a live-usb (no cd, because it's a netbook), but I choose during the installation the option to 'encrypt' my documents.. So is it still possible to restore my documents, photo's etc. from the home-folder? I really need to get those things back..
When I try to boot all I get on my screen is the text (in Dutch): 'Disk partition / is not ready or is not found - Keep waiting or press S to cancel mounting, or press M to recover manually' The manual recovery doesn't do anything at all, and by the way, booting in the 'recovery mode' won't work either.
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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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Nov 23, 2010
My raid array has failed. I have two disks /dev/sda and /dev/sdb./dev/sdb has failed and I could not rebuild the array(madm returned that the device is busy) so I rebooted the machine. After that, the whole sdb disk went missing, as it now only shows sda in fdisk -l.Did the disk went totally dead or my raid glitched?
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Apr 29, 2011
Got a Netbook. No CD drive so mounted image to USB stick and booted into installer from there. Chose the option to upgrade from 10.04 LTS to 11.04 and the installer hung on removing conflicting operating system files. In the end, I was forced to restart as nothing else could be done. Now, it just boots to this:
Quote: error: no argument specified.
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory
mount: mounting /proc on /root/proc failed: No such file or directory
Target filesystem doesn't have /sbin/init.
No init found. Try passing init= bootarg.
BusyBox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu11) built-in shell (ash)Enter 'help' for a list of built-in commands.
I booted to the Live CD and reinstalled Grub which now brings up a list of all the kernels and Memtest but, aside from Memtest, they still all boot to this. I don't have the passphrase for the Home folder (don't even remember encrupting it!) so I tried the ecryptfs method from the live CD to get the passphrase and backup the Home folder and do a new install but there is no trace of .ecryptfs or .Private folder and pretty much everything in the Home folder is locked. Tried an fsck on the hard drive, but nothing. I do remember thinking the hard drive was referred to as hda1, but the live CD shows it as sda1. Don't know if this affects anything. I have a feeling the installer regarded the USB stick as first hard drive and got confused.
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Oct 16, 2009
my Fedora 11 system is not starting anylonger. It stops with the message:
Code:
VFS: Can't find ext4 filesystem on dev dm-0
The system told me since a while, that a lot of the sectors of one disk of the (software) RAID compound are failed already. So tried to disconnect each of the disks and start them separately. Unfortunaltly this is not working (for one its is not working at all, the other wents the same far as with both), when I tried to recover the system with the Fedora DVD, it said no distribution found. I am quite new and do not know so much about linux system, so i do not know what further information you could need. Maybe it can be important, that both disks are encryped (the system wents so far, that I can type in the password).
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May 27, 2010
I am using WUBI to run ubuntu.I upgraded to 10.04 from ubuntu 9 using the update option provided.On restart after the update,i get to grub rescue prompt.Here when i type ls i get the output as hd0 and hd31.I cannot login into windows because the option to select between windows 7 and ubuntu is not available anymore.
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Apr 16, 2011
I was running 10.10 and I started to upgrade to 11.04 beta2. And while it was in the middle of applying the updates it shutdown on its own. When I went to boot it back up it originally told me something about the drive is unavailable and asked if i wanted to do an automatic or manual recovery. Neither of those worked so created a live cd of 10.10 and it will boot to that with no problem. I did some research and thought that it may be the grub bootloader so i upgraded that to version 1.98 and now all it does is go to a black screen with the prompt "grub>". So my question is what do i do? I would reinstall 10.10 but I cannot loose any of the data that is on the disk.
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Jul 18, 2010
Ive managed to screw up an encrypted disk experiment, basically at boot i get ask to enter my password which i lost.
Only a data partition is encrypted, the linux system is unecrypted.
However, the skip option thats presented that should work via S does not work. every key in input adds one * behind the password prompt.
The password prompt changes from white to red though. as if in the white phase you should be able to skip.
Im to lazy at the moment to swap the drive and comment the drive in fstab
I already booted in single, but still the mount occours. is there another way to get the system booting?
ubuntu server 10.04
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Jan 9, 2011
I've got a raid5 array of 4 disks with ubuntu 8.04 runing on it that is currently still working:
/dev/sda
/dev/sdb
/dev/sdc
/dev/sdd
Smartmontools for /dev/sdc tell that there are 9 sectors pending for reallocation:
Code:
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 9
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 9
And /dev/sdd has increasing number of reallocated sectors (about 1 every couple of minutes):
Code:
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 1735
/dev/sdc has failed a coulple of times this week (but I have always sucessfully readded it to raid5) . But the increasing number of reallocated sectores on /dev/sdd concerns me even more.
I'm affraid that during removal of /dev/sdd and adding new /devs/sdd disk, raid might fall appart. That's why I would try to do it in Ubuntu Live CD:If the raid falls appart (/dev/sdc fails) during the readding of new /dev/sdd disk, I might still remove the new /dev/sdd and return the previous one and assemble the raid with:
/dev/sda
/dev/sdb
/dev/sdd (old one that was previously removed)
Does assembling Raid in Ubuntu Live and adding new disk for /dev/sdd write anything on /dev/sda, /dev/sdb and /dev/sdc in the process of adding /dev/sdd into raid5?
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Apr 30, 2010
After upgrading and restarting my laptop, The purple splash screen hangs, and the terminal gives this message.
Code:
Also the boot menu does not show (I cannot open the recovery mode)
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Aug 13, 2014
I upgraded from deb7 to deb8, but am no longer able to boot. After passing the grub boot menu, the following messages are displayed:
Code:
Select allLoading, please wait...
[ 6.065713] systemd-fsck[148]: /dev/sda1: clean, 428644/1310720 files, 410616
9/52442880 blocks
[ 7.480551] Error: Driver 'pcspkr' is already registered, aborting...
[ 8.692700] systemd-fsck[341]: /dev/sda5: clean, 145485/6176768 files, 17407409/24695552 blocks
[ 18.066215] Loading kernel module for a network device with CAP_SYS_MODULE (deprecated). Use CAP_NET_ADMIN and alias netdev- instead
_
The screen then clears and an underscore is displayed as the sole character at the top left position of the screen. The system hangs at this point. During installation, I rejected two changed files: /etc/init.d/bootlogd and /etc/libreoffice/sofficerc. For both, I opted to keep the installed version (the default choice of the installer) rather than replacing with the new version. The first might be related to the problem, although it seems to be responsible only for logging the boot process, and I would not expect this to compromise booting.
In case this information is useful, sda1 is mounted at /, sda2 is swap space, sda3 is extended, and sda5 is a logical partition mounted at /home.
I am able to boot into rescue mode, but other than that the system is not usable. Unfortunately, no useful error messages are given to aid in diagnosing the problem.
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Aug 1, 2010
I had done a new lucid install to a 1 TB RAID 1 array using the alternate CD a few weeks back. I messed up that system trying to some hardware working that lucid doesn't have drivers for yet, so I gave up on it and reinstalled to a single 80 GB disk that I now want to move over to the RAID array.
I moved all of the existing files on the array to a single folder, then copied all of the folders from the 80 GB disk over to the array with permissions and symlinks (minus the contents of /proc and /sys, which I created empty).
These are the commands I used:
Quote:
p -a -d -R -v -t /media/raid_array /b*
cp -a -d -R -v -t /media/raid_array /d*
cp -a -d -R -v -t /media/raid_array /e*
cp -a -d -R -v -t /media/raid_array /h*
[Code]....
I tried to change fstab to use the 689a... for root, but when I try to boot, it's still trying to open /dev/disk/by-uuid/412d...
So then I booted from the single disk again and chrooted into the array, then ran update-initramfs -u. I got 3 "grep: /proc/modules: No such file or directory" errors, and "cat: /proc/cmdline: No such file or directory"- so I created directory /proc/modules, created an empty file /proc/cmdline, and ran the initramfs update again. Then I tried to shut down, which hung (probably because I was doing all of this from a terminal window in Gnome), so I killed the power after a couple of minutes.
It's still trying to use /dev/disk/by-uuid/412d... to boot.
What am I missing? I assume I just have to change the UUID to mount as root, but I don't know how.
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Jun 11, 2009
I just upgraded via preupgrade-cli (from FC10), rebooted, the upgrade process completed, then the system rebooted and I just see a blinking white cursor now.I was able to boot up from a live cd of FC11, but I'm not sure how I can repair the system.
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Sep 19, 2010
I have just upgraded my FC12 installation to FC13. The initial boot failed (just blank screen). Second time I received 'selinux targeted policy relabel is required'. I let that run, but still the boot did not suceed.
I then went in to verbose boot and saw that the boot would hang at libvirtd. So I disabled libvirtd for anything above run level 1. Next boot failed at atd, disabled atd. Next boot failed at 'monthly Smolt checkin'.
At that point and booted in to single user mode and dissabled SELinux, thinking that was the cause of all the problems. That did not help.
The update process has also removed my previous kernels, so I can't test a different kernel
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Jul 16, 2010
I just upgraded my OpenSuSE 11.2 system to 11.3 and have experienced the following problem:
My hard drive was encrypted beforehand, and after the upgrade(which went smoothly) will no longer decrypt. I type in my passphrase at the prompt, press enter and the start up process never resumes. I am able to access the filesystem from the Rescue System option in the install disk. What's strange is that this worked smoothly on another laptop of mine.
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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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Apr 24, 2010
First post so please excuse my lack of correct terminolgy/understanding/etc. Running Fedora 12 with the following software raid setup...
Mount Device Underlying Partitions
/ /dev/md0 /dev/sda1 /dev/sdb1
swap /dev/md1 /dev/sda2 /dev/sdb2
/home /dev/md2 /dev/sda3 /dev/sdb3
Recently updated to kernel 2.5.32.11-99 and upon restart, failed to boot. Get stuck at a recovery prompt asking for root password or Ctrl-D to continue (which reboots system). I worked around this problem by reverting to the previous kernel 2.6.32.9-70. From what I can tell, with the newer kernel there is a problem with device enumeration of software raid volumes.
[Code]...
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May 27, 2010
I am using WUBI to run ubuntu.I upgraded to 10.04 from ubuntu 9 using the update option provided.On restart after the update,i get to grub rescue prompt.Here when i type ls i get the output as hd0 and hd31.I cannot login into windows because the option to select between windows 7 and ubuntu is not available anymore.
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Mar 15, 2011
I newly installed debian squeeze with software raid. The way I did was, as also given in this thread.
- I have 2 HDD with 500 GB each. For each of them, I created 3 partitions (/boot, / and swap)
- I selected the hard drive and created a new partition table
- I created a new partition that was 1GB. I then specified to use the partition as a Physical Volume for RAID. and used for /boot and enabled bootable.
- Created another partition, which is of 480 GB, and then specified to use the partition as a Physical Volume for RAID. and used for /.
- Created another partion and used for swap
Then RAID configuration:
Through Configure RAID menu -> create MD device ->
(2 for the number of drives, 0 for spare devices)
Next select the partitions you want to be members of /dev/MD0. I selected /dev/sda1 and /dev/sdb1 (for /boot)
Next select the partitions you want to be members of /dev/MD1. I selected /dev/sda6 and /dev/sdb6 (for /)
And no RAID for swap partitions
'Finish Partitioning and write changes to disk' --> Finish the rest of the install like normal. Everything is ok now, except I am not sure how to test my raid config. When I pull the power of the HDD, it only boots from one disk. I read in some forum that I may have to install GRUB manually on the other. In Debian Squeeze, there is no grub command. Not sure how to make my software raid bootable from both disk. I configured /boot partitions of both disks to be boot=yes. Not sure whether that is ok.
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Mar 28, 2010
I wanted to implement raid5 such that one partition is from my laptop's hard disk and others from other hard disks. After making one partition a raid partition, I rebooted the system. The computer stopped mid-way during booting, and brought me to the shell. On typing fsck -p, it told me an unexpected error occured in the partition which I had made for raid. Is there some condition that we cannot boot from a disk containing one of the raid partitions ?
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