Debian :: RT Kernel Not Booting - "/dev/disk/by-uuid/..." Does Not Exist
Dec 30, 2010
After installing the RT kernel, and updating my boot loader, I get this message. Code: ALERT! /dev/disk/by-uuid/... does not exist. Dropping to a shell! It doesn't make a difference whether I pass the 'root=/dev/', or 'root=UUID=', options to the kernel. I've also noticed a message while the system was attempting to boot up. Code: host side 80-wire cable detection failed, limiting max speed to UDMA33 This is all strange to me as I was running the Debian 2.6.32-5-686 kernel, without any problems.
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Jan 23, 2010
Fresh install of 9.10. Update all. The update froze at the very end: configuring grub-pc. I let it run like that all night before settling for a reboot while the update manager was still running. (The update also raised the kernel version.) After reboot, I tried the newer kernel [2.6.31-17-generic] at the grub menu and got this error:
Quote:
udevadm trigger is not permitted while udev is unconfigured.
udevadm settle is not permitted while udev is unconfigured.
svgalib: Cannot open /dev/mem.[code].....
And, cat /proc/modules gives me a long list of modules (too much to retype for now).So my hard drive is there. maybe some errors on the / home partition [sda6] and I can get to the root directory.
FYI: MS-win XP still boots fine from grub.
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Oct 16, 2010
Basically, today I installed Ubuntu on my Toshiba NB200 to dual boot with XP. The installation went okay (I think) but after, when I rebooted, and selected Ubuntu from the possible selections, I got this message:Quote:Gave up waiting for root device.Common problems:
-Boot args (cat /proc/cmdline)
-check rootdelay= (did the system wait long enough?)
-check root= (did the system wait for the right device?)
[code]...
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Sep 16, 2010
i'm using this guide videos - howto: debian linux kernel compilation, part 1 and the author says i need kernel 2.6.26 this version of kernel doesnt longer exist in kernel.org website and the only 2.6.26 i found is a patch here. should i use the patch? or download another version of kernel?
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Apr 27, 2010
I would get the message that the uuid file does not exist. I've been online looking for fixes since yesterday morning and nothing has helped at all. I've read online that I should run fdisk -l to obtain info to share with others, but that command doesn't work in any command prompt I open. I am running Ubuntu 9.10 with the latest patches and I'm sure you guys know that it runs Grub2 loader...if that helps at all.
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Apr 23, 2010
Alright, I have downloaded the upgrade for 10.04 and installed upgraded from my previous 8.04. Everything was working all fine until I had to reboot my pc. When I did i got some errors
Mount: Mounting none on /dev
It goes on to tell me that my UUID does not exist. Then it says
ALERT! Alert! /dev/disk/by-uuid/xxxxxxxx-xxxx-xxxx-xx$ does not exist. Dropping to a shell! It then drops to a very simple shell which has no flexibility and is very frustrating.
EDIT: This is the full error message
Mount: Mounting none on /dev
boot args cat /proc/cmdline
check rootdelay =(did the system wait long enough?)
check root =(did the system wait for the right device?)
missing modules ( cat /proc/modules)ALERT! /dev/mapper/debian-root does not exist dropping to a shell.
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Jun 28, 2010
I have an SiI hardware SATA RAID card, with two 500GB disks in mirrored RAID configuration. When I first plugged them in and set it up, things seemed to work ok, but on boot the raid controller told me that the RAID needed rebuilding, and it would happen automatically after POST. So I didn't worry about it, and the drive mounted fine, and it's been that way for years. I just went in and manually on-line rebuilt the RAID in the controller's BIOS, and now when I boot into Ubuntu, both disks show up in fdisk, but neither show up in /dev/disk/by-uuid. Am I missing something?
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Mar 1, 2011
I seem to have another issue with my raid system
mount -a
mount: special device UUID=fb518c74:2b6bd0f4:66db5ce6:7e004239 does not exist
but when i do mdadm -vv --detail /dev/md5 ... this is what i get --->
/dev/md5:
Version : 1.1
Creation Time : Fri Feb 25 14:07:36 2011
Raid Level : raid1
[code]....
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Apr 3, 2009
I have 2 CPUs Which are Intel and AMD based. I used F9 before and didnt have any issues while I removed the hdd that I'd installed F9 on INTEL based and then put my hdd on my AMD based cpu. Well it booted and ran perfectly no issues came up.And then I've done the upgrade to F10 (clean install on INTEL). I do the same case above.But I got error msgs it said that the UUID cannot be found (I was using label on F9 fstab and worked fine).
I put back my hdd to intel based cpu and then try to edit my fstab and menu.lst (change UUID to LABEL). WOW I thought by changing UUID from fstab and menu.lst would resolve my problem but it doesnt solve anything. My devices (sda1/2/3, /boot, and /home) cannot be reconized.Well do you guys know how to change UUID to LABEL? and what exactly my problem?
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Oct 4, 2010
Is there any C function that will translate UUIDs into device names? I have a little graphical mount tool that can read user-mountable device names from /etc/fstab and lets you cycle through the list and mount or unmount them. But it doesn't work with UUIDs, which are preferred these days. Is there any way around this?
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Apr 23, 2010
I want a debian server running dhcp/tftp/pxe containing a tarball of a 'client' debian installation.I want a client that pxe boots, talks to the server, creates a ramdisk, untars the 'client' tarball to the ramdisk and boots into it. Once that's working, I want an NFS map back to the server for the users home directory.Can't find any really helpful howto's... wondering if anyone on here has done this?
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Feb 9, 2011
I followed the documentation for upgrading lenny -> squeeze. After reboot I get 2.6.26 not 2.6.32. I also ran 'update grub' before reboot. Here is what I have:
jurka@arkiv-x:~$ dpkg -l linux-image-2.6.*
ii linux-image-2.6.26-1-686 2.6.26-13lenny2
Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4
ii linux-image-2.6.26-2-686 2.6.26-26lenny2
Linux 2.6.26 image on PPro/Celeron/PII/PIII/P4
ii linux-image-2.6.32-5-686 2.6.32-30
Linux 2.6.32 for modern PCs
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Mar 18, 2010
I'm running Kubuntu Karmic on my Dell Inspiron laptop - about 200 bug fixes behind because my only available internet is a cellular connection on a crappy wi-fi router - and last night, I suspended it, but it shut down instead. Not a problem, it does this fairly often, figure the RAM gets jostled or something.
But when I go to boot it up, it gets stuck at the pre-loading screen before getting garbled and dropping to the shell, where it says "mount: mounting /dev/disk/by-uuid/[insert hex code here] failed: invalid argument". Of course, mounting /root/sys, /root/dev and /root/proc fails, (directory does not exist) and it gives me the busybox initramfs prompt.
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May 18, 2011
im am new in compiling kernel, i had kernel 2.6.32-5 on debian 6 , so i compiled kernel 2.6.38.6 , my system can boot and up but i have a problem with flash disk and CDs and DVDs , now i cant mount these cases, in compiling i select CD-ROM /dvd filesystem and Dos/fat/NTFs filesystem too
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Apr 30, 2011
long story, I upgraded my system from maverick to natty, didn't like it so restored my system with a backup that I had done recently. after it rebooted I used gparted live CD to expand my partition, moving swap to the end of the HD, then when I rebooted grub didn't work so I booted with ubuntu live cd and reinstalled grub. then I booted normally but nautilus didn't work and had lots of problems. So I installed ubuntu again with ubuntu live cd, formating the partition and expanding it, no problems at all.But, I wanted my files back, so restored the system again, now the message that I get isQuote:
Gave up waiting for root device. Common problems:
-Boot args (cat /proc/cmdline)
-Check rootdelay= (did the system wait for the right device?)
[code]....
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May 25, 2011
I did a fresh install of F15, and I can not get it to boot
Quote:
Booting Fedora (2.6.38.6-27.fc15.x86_64)
root (hda,4)
Error 21: Selected disk does not exist
Press any key ton continue ...
The contents of my fstab
Quote:
UUID=9fc649bd-ea40-44ab-88f6-29afe4f26576 / ext3 defaults 1 1
UUID=2437a8af-311a-4caf-99b3-1f137df69d43 /home ext3 defaults 1 2
UUID=a6f67606-ecb6-47c4-8913-f101fc6a097e swap swap defaults 0 0
[code]....
From what I can figure out, grub can not figure out which disk has my root file system. I checked the partition labels and they match the UUID that are in my fstab.
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Mar 7, 2011
Plan to use GRUB for multiple booting to select the OS but only with luck have I got it partially to work. Windows 98 and Puppy 431 O.K on first HDD but Puppy 421 on second HDD /dev/sdb1 stops at error 21.
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Nov 17, 2010
Currently I'm running 3 operating systems on my machine; Windows XP, Windows 7 and Fedora 14. I've installed them in the following order: XP -> Win7 -> Fedora14, with the idea that this would work fine regarding operating system selection at boot time.
But unfortunately, I just installed Fedora, and now I'm unable to boot Windows 7/XP. When I select the "Other" option in the Grub menu, I get the following error: Code: Error 21: selected disk does not exist To provide as much info as possible, here is a boot info script log:
[Code]...
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Feb 12, 2009
I've downloaded Ubuntu 8.10 and I have installed it within ms windows. My first problem was when I went to boot Ubuntu and the graphics weren't right so I rebooted it with a different graphic configuration and it installed successfully. When I went to boot Ubuntu a second time to actually use it I got the following error:
ALERT! /host/ubuntu/disks/root.disk does not exist. Dropping to a shell!
BusyBox v1.10.2 (Ubuntu 1:1.10.2-1ubuntu6) built-in shell (ash)
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Jan 2, 2010
My dual proc, dual core Opteron MSI Master2FAR motherboard failed, and I try to boot a disk, used on this board as boot disk, on an Intel based Gigabyte GA-965-DS3. Both systems are x86_64 architecture.
The OS is on both systems is openSUSE 11.1.
On booting the disk on the Gigabyte, the disk is seen correctly by the BIOS, but not by the OS, and there is no /dev/sdX; no /dev/disk/... either. I am taken to a login shell from the ramdisk.
When I just mount this disk on the Gigabyte (booted with the Gigabyte's original boot disk) everything seems fine. No suprise to me, since the disk was fine, and was unmounted gracefully and physically taken off the MSI before the board failed.
I think that the cause lies in the fact that the harddisk controller on the Gigabyte is different from the MSI, and the driver for that controller is not available at boot time.
I have two questions:
- is my assumption correct, or is something else going on?
- if I am right, is there a way to get this disk booting on the Gigabyte (or on another system, for that matter)?
You might want to ask why I want to boot this disk on the Gigabyte in the first place, since I can mount it and see all data on it. I have a reason for that, but telling that story would make this topic too long, and it's too off-topic. Most certainly I will get to that in another topic.
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Oct 13, 2010
Just tried installing Ubuntu 10.10 from a USB device on my Windows 7 machine but something goes wrong. Far into the installation the computer restarts, asks me which operating system I want to start (it had already done this once before) and I choose Ubuntu. Then I get three alternatives:
Ubuntu, Linux 2.6.35-22-generic
Ubuntu, Linux 2.6.35-22-generic (recovery mode)
Windows 7 (loader) (on /dev/sdb1)
I pick the top choice, and get the following message:
ALERT! /host/ubuntu/disks/root.disk does not exist. Dropping to a shell.
If I start recovery-mode i get the same message. There's some text above the message that reads "new low speed USB device using ohci_hcd and address"... Could there be a problem with the usb-drive? If I remove the USB drive I get the message: Gave up waiting for root device.
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Nov 19, 2010
Currently I'm running 3 operating systems on my machine (in order of installation); Windows XP, Windows 7 and Fedora 14. Unfortunately, after I installed Fedora I'm no longer able to boot Windows 7/XP. When I select the "Other" option in the Grub menu, I get the following error:
Code:
Error 21: Selected disk does not exist
To provide more info, here is a boot info script result:
Code:
Boot Info Script 0.55 dated February 15th, 2010
Boot Info Summary:
=> Windows is installed in the MBR of /dev/sda
=> Grub 0.97 is installed in the MBR of /dev/sdb and looks on the same drive in partition #3 for /grub/stage2 and /grub/grub.conf.
=> Windows is installed in the MBR of /dev/sdc .....
mdadm: No arrays found in config file or automatically
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Jan 5, 2010
What would be the best way list disk and partitions in the fstab file?
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Jun 15, 2010
I have two encrypted partitions which I cannot find UUID numbers for.
/etc/crypttab looks like this:
[Code]....
and *sometimes this works, other times I have to edit the file and /etc/init.d/cryptdisks restart.
Obviously I should use UUIDs here and in fstab but blkid does not list those partitions
[Code]....
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May 9, 2011
I have, as I have in the past, copy/pasted a partition using gparted to get a working OS to another place.
I have always done this in the past to a different drive. Never paid much attention to the UUID.
This time I did it on the same drive. The partitions have the same UUID. This is not a good thing.
The copied OS boots and mounts fine as I edited the fstab to go by /dev/sdxy (where x is the drive and y the partition). My grub uses a custom menu using symbolic menu entries so it goes by the partition definition instead of UUID too.
I would really like to change the UUID on that partition.
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Mar 15, 2015
I am running Wheezy as my main OS in the first drive in my desktop. I use the 2nd drive for data. I am trying to add another OS to multiboot. When I ran grub-update in Wheezy, I am getting device letter for the root device instead of UUID in grub.cfg, in the os-prober section. Like this
Code: Select allsearch --no-floppy --fs-uuid --set=root 6ee49a8e-a619-49c7-9f66-51a5ca9a48cc
linux /boot/vmlinuz-316-x86_64 root=/dev/sdb3
initrd /boot/initramfs-316-x86_64.img
In the same file, UUID was used for the existing kernels.
Code: Select alllinux /boot/vmlinuz-3.2.0-4-686-pae root=UUID=c2eecf02-d427-4f2e-9fd0-9db61256cbac ro quiet
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.2.0-4-686-pae
How can I get UUID instead of /dev/sdb3 for the 2nd OS?
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Jun 30, 2011
I have a debian 6 system in my basement acting as a media server. Debian is on a separate HDD from the raid drives and there is one external drive. Under normal conditions the Debian HDD shows up as /dev/sdk and the external shows up as /dev/sdl, no problems here because I use UUID for mounting. The problem is sometimes this drive isn't picked up on restarts (its old and I think the issue is the power supply in the base of it, to be solved later) . This wouldn't be a problem but it some how shuffles the drive addresses and the Debian HDD becomes /dev/sde, this in turn messes up a script that does a weekly dd of that hard drive. I am only really worried about this for when I go on vacation and I wont be at home if the power goes out.
So, is there a way to address the entire hard drive (not just a partition) other than the dev file? Why did this change from Debian 5 to 6? I never had this problem before with 5.
In case you are wondering, I find it easier recover from an image rather than do a reinstall, then get all the updates and software, then put in all the backed up files.
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May 16, 2011
System Fossil age laptop, Debian testing with lilo. SymptomAfter an upgrade (2nd week May), custom kernel compiled, kernel panics on boot, saying unable to mount root drive. (or more precise, unable to mount whatever uuid device). Stock kernel can boot. Workaround Instead of uuid on kernel option, use prehistoric root=/dev/XXX.
edit:The kernel which panics is 2.6.38 (make oldconfig, all default answer from 2.5.32 config)Stock is 2.6.32 On 2.6.38 after boot with tweak, the command "uuid" looks good.
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Dec 14, 2015
Been doing some installations in a newly upgraded machine where I'm setting up two instances of 8.2 in slightly different configurations.Installing from netinst AMD64 DVD with firmware non-free. First installation goes smooth as then the second changes the UUID of the swap partition, meaning that the first then can't find it. To add insult to injury the second installation doesn't install GRUB in the MBR of the HDD.
Nothing different or special about the installation which is standard graphical with manual allocation of previously set up partitions. I don't touch the swap drive in the partitioner - just point to the correct partitions for / and /home as I want them. This is exactly as I've done before, many times.Setup asks me if I want to install GRUB in MBR and I answer "No" (because it would otherwise load in MBR of sda where I want it on sdb) then point to sdb in the next screen. Again really nothing different to what I've done dozens of times.
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Jan 19, 2016
I am running Debian 3.2.0-0.bpo.2-amd64 on hyper-v, my / volume ran out of space and is sitting at 100%, I have extended the disk size on hyper-v, however when I go to Fdisk I see duplicates of each disk.
I have total of 2 vhds on the vm, so I see 4 disks under fdisk. Here is the output of fdisk
root@apachevm:~# fdisk -l
Disk /dev/sda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x0009bfe8
[CODE]....
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