Linux Grub Error 21
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HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Linux Forums > Linux - Software what is Grub loading error 21, and how can I fix the problem! User Name Remember Me? Password Linux - grub loading please wait error 21 suse Software This forum is for Software issues. Having a problem installing a new program? Want grub loading error unknown filesystem to know which application is best for the job? Post your question in this forum. Notices Welcome to LinuxQuestions.org, a friendly and active
Grub Error 21 Windows 7
Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Page 1 of 2 1 2 > Search this Thread 08-30-2004, 05:06 PM #1 logiplex LQ Newbie Registered: Aug 2004 Location: USA Posts: 2 Rep: what is Grub loading error 21, and how can I fix the problem! My computer has a partition for linux fedora (the default OS) and also XP. When I boot up, I get the following: Grub loading stage 1.5 Grub loading, please wait..... error 21 When I hit enter, I get a blank screen with a blinking cursor. Now, I hit Ctrl-Alt-Del, and suddenly the Gr
Today's Posts Advanced Search Find the answer to your Linux question: Entire Site Articles Downloads Forums Linux Hosting Forum Your Distro Red Hat / Fedora Linux [SOLVED] GRUB Error 21 If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. ** If you are logged in, most ads will not be displayed. ** Linuxforums now supports the http://www.linuxquestions.org/questions/linux-software-2/what-is-grub-loading-error-21-and-how-can-i-fix-the-problem-224475/ Tapatalk app for your mobile device. Page 1 of 2 1 2 Last Jump to page: Results 1 to 10 of 13 Thread: [SOLVED] GRUB Error 21 Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Enjoy an ad free experience by logging in. Not a member yet? Register. 03-27-2010 #1 KPolulak View Profile http://www.linuxforums.org/forum/red-hat-fedora-linux/162056-solved-grub-error-21-a.html View Forum Posts View Articles Just Joined! Join Date Feb 2009 Posts 42 [SOLVED] GRUB Error 21 Here's the problem: My laptop is running Fedora 12. I installed BackTrack 4 onto an external USB hard drive using a LiveCD. Now when I boot my laptop (external HDD removed), I get this: Code: GRUB Loading stage1.5. GRUB loading, please wait... Error 21 I don't get this. I never touched anything with my internal drive. Well, maybe. When I was reviewing what partitions the installer was going to format, the swap partition for my internal drive (Fedora) was set to be formatted even though I did not specify this. I figured that wouldn't cause any problems. Also, Fedora never used to show GRUB loading at all. Screen was blank until Fedora starting loading. Maybe this means that this is a copy of GRUB from my BackTrack disc? Also, I ran 'fdisk' to look for anything suspicious and under /dev/sda1 (internal drive, boot partition) it says "Partition 1 does not end on cylinder boundary." Please, please help. I have a half-completed research paper on this drive and LOTS of homework and about 70 O'Rielly books. 03-27-2010 #2 devils casper View Profile View Forum Post
Favorite Rating: Error 21 in grub during the upgrade to newer SLES 11 (SPx)This document (7014290) https://www.novell.com/support/kb/doc.php?id=7014290 is provided subject to the disclaimer at the end of this document. Environment SUSE Linux Enterprise Server 11 Service Pack 3SUSE Linux Enterprise Server 11 Service Pack 2SUSE Linux Enterprise Server 11 Service Pack 1SUSE Linux Enterprise Server 11 Situation Server was converted from running as a "physical server" to running as a "virtual machine" running error 21 on VMware infrastructure. The conversion was made by using VMware vCenter Converter.SymptomsDuring the upgrade process from a previous OS version (i.e. SLES 10 SP4, or older SLES 11 SP) to a newer version of SLES 11, an error is encountered when the grub bootloader is installed. The relevant text of the error is similar to:grub> install grub error 21 --stage2=/boot/grub/stage2 (hd0,0)/boot/grub/stage1 d (hd0) (hd0,0)/boot/grub/stage2 0x8000 (hd0,0)/boot/grub/menu.lstError 21: Selected disk does not existgrub> quitIf using a graphical install, you may see the following: Resolution Revert the VM back to the snapshot before applying the update/installation.Modify the /boot/grub/device.map to point to the proper disk/partition. Ideally, you will want to use either:/dev/disk/by-idor/dev/disk/by-uuidReboot and run the upgrade again. Cause After conversion to a virtual machine, the /boot/grub/device.map file no longer points to a proper device. Additional Information When the server is on physical hardware, the /boot/grub/device.map file may incorporate the driver name in the device. In our example it read like:(hd0) /dev/disk/by-id/cciss-xxxxxxxxxxxxxxxxxxxx(hd1) /dev/disk/by-id/cciss-xxxxxxxxxxxxxxxxxxxxAfter being converted to a virtual server, the old name will only work as long as grub isn't modified -- which occurs when upgrading to a new OS version or service pack. Therefore, in order to avoid this error, use the appropriate entry in /dev for your device. Try to avoid using disk names, like cciss devices, and use the links to your disks under /dev/disk/by-id or /dev/disk/b