Console application permitting the user to choose between several installed operating systems.

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-2
votes
0answers
10 views

grub can't find CentOS 7 [on hold]

My desktop was tri-booting between Ubuntu 2.04, CentOS 6, and Windows. I installed CentOS 7 in the space that CentOS 6 used, but update-grub doesn't result in the new CentOS showing up. I can only ...
0
votes
2answers
100 views
+50

Converting Linux machine from XenServer to Hyper-V

I'm in the process of converting the last few on my XenServer VMs over to Hyper-V. The majority of them have been Windows machines and I've done a backup and restore using Windows Backup. For some of ...
3
votes
0answers
26 views

How does Grub Stage1, exactly, access/load stage 2? [migrated]

This is my first ever question, I have put this question in front of Red Hat Instructors but didn't find any satisfying answers. I'm using RHEL/CENTOS6, GRUB Legacy 0.97, and have consulted heaps of ...
-1
votes
0answers
21 views

Grub Rescue, always getting unknown filesystem [on hold]

After launching fsck command and rebooting a Debian server, i run into grub rescue mod. So am trying to recover my system but with nothing when i execute ls i get : (hd0), (hd0, msdos5), (hd0, ...
1
vote
0answers
41 views

Is it possible and wise to put the grub bios partition on a software raid?

in a two disk setup /dev/sda /dev/sdb i created per disk 3 partitions bios_grub 1mb linux raid 512mb md0 (/boot - ext3) linux raid rest md1 (physical volume for lvm) the answer on ...
1
vote
0answers
60 views

Problems installing software on AWS EC2 instance (Debian 7.8 'hvm')

After some issues due to the lack of support in required kernel for the network card in my machine (though I'm aware of how to compile the driver for my card, I don't want to do that, based on some ...
0
votes
0answers
17 views

Ubuntu Server 14.04 kernel gives up before modprobe completes scan of eSATA array

We have a new server with Ubuntu Server 14.04 LTS and are trying to use our eSATA enclosures from our older 12.04 server. We have two 8 bay Probox eSATA enclosures and two 4 bay Probox eSATA ...
2
votes
2answers
68 views

Debian software RAID1 is not working when I remove hard drive

I have been trying all weekend to get RAID working on an old server computer with the Intel ICH7 / ICH7-R SATA-II controller running dual hard-drive with RAID 1. After giving up in hardware raid, I ...
2
votes
1answer
71 views

Replaced SATA controller, software RAID (mdadm) stopped booting: grub rescue> no such disk

I have a relatively old server machine which has no SATA ports on the motherboard (Dell Precision Workstaion 650). Also have a cheap FakeRAID controller (VIA VT6421 Chipset) and two Seagate 3TB drives ...
0
votes
1answer
35 views

Copy centos 6 modify mdadm raid 1 and clone to new mdadm raid 1 ssd

I have: Centos 6.7 grub-install -v grub-install (GNU GRUB 0.97) lsblk two new SSD 128gb Live usb with Parted_Magic_2015.03.06 /boot/grub/device.map # this device map was generated by ...
1
vote
0answers
34 views

Cloudlinux, GRUB 0.97, software RAID, won't automatically boot

My server is running Cloudlinux as has a software RAID mirror (/dev/md2 made from /dev/sda and /dev/sdb) mounted on / It's been running fine, but after simulating a raid failure and rebuilding the ...
0
votes
1answer
20 views

EXTLINUX warns to install grub

While doing apt-get dist-upgrade on a Debian GNU/Linux Jessie EXTLINUX warned me that now was mandatory to install grub. The system was installed after an image not done by me: is it safe to ignore ...
2
votes
1answer
30 views

grub 0.97 (legacy) confusion between menu.lst and grub.cfg

I've been looking through documentation but am still utterly confused. I'm used to using menu.lst to configure grub but grub.cfg seems to be the way to do it for grub2. My Debian 8 server has grub ...
0
votes
0answers
56 views

AWS pv-grub don't see config file

I created ami from scratch: ec2reg -n centos7 -b '/dev/sda=snap-96a520e3' --kernel aki-499ccb20 -a x86_64 but pv-grub can't find config file: Thread "Idle": pointer: 0x20f0002050, stack: 0x2070000 ...
5
votes
3answers
351 views

No volume groups found - CentOS

I have migrated a CentOS 5.11 server from VmWare to Hyper-V and when trying to boot the server. I'm getting the following error messages: "No volume groups found" ""VolumeGroup00" not found" and ...
0
votes
0answers
88 views

Why is grub not booting from 2nd drive? - boot info says “no valid partition table found”

My volumes look like this /dev/xvda1: LABEL="cloudimg-rootfs" UUID="d4f2aafc-946a-4514-930d-4c45e676f198" TYPE="ext4" /dev/xvdf1: LABEL="permaroot" UUID="afb7e502-ad08-4d6a-8701-2c05863f958e" ...
0
votes
1answer
56 views

How to save output from grub-md5-crypt to a file ?

I am using Cent OS 6.5 and I want to save the generated output and md5 hash from grub-md5-crypt command to a file. The grub-md5-crypt command asks us to set a password. I want the password(which I ...
2
votes
2answers
1k views

Intel NUC5CPYH - Ubuntu Server 14.04.2 and 15.04 post-install crash

I've experienced this problem with Intel NUC model NUC5CPYH using both Ubuntu Server 14.04.2 and Ubuntu Server 15.04. After completing the installation (which in my experience is best done from an ...
0
votes
1answer
31 views

How can I modify the bootloader config on debian 7

I want to install Debian 7 remotely. I've followed this tutorial: https://wiki.debian.org/DebianInstaller/Remote How can I execute Step 8? I found the command update-grub but I don't know where to ...
0
votes
1answer
68 views

Deleted MBR on virtual machine on purpose, but entries are preserved

I'm playing with Master boot record. I decided to delete and restore it on my vmware machine. With Ubuntu LiveCD I'm trying to erase partition entries and signature with command: dd if=/dev/zero ...
0
votes
1answer
184 views

Debian/Installer Preseed Remove Post Install Kernel Options + Multi NIC Preseed Tip

In light of recent automation trends, I would like to be able to fully automate an install of Ubuntu. My my first problem was auto selection of the bootif with multiple NICs break Ubuntu/Debians ...
0
votes
0answers
533 views

Ubuntu 14.04.2 LTS - Errors on apt-get autoremove old kernel images - dpkg and grub errors

I was running my usual apt-get update / apt-get dist-upgrade sequence on my Ubuntu 14.04.2 LTS server, and saw some old kernel packages marked for autoremoval. I frequently run apt-get autoremove to ...
2
votes
3answers
2k views

Disable THP and THP defrag on CentOS 7 EC2 instance

I want to disable transparent_hugepage (THP) on a CentOS 7 EC2 instance, which is enabled by default: # cat /sys/kernel/mm/transparent_hugepage/enabled [always] madvise never # cat ...
1
vote
1answer
84 views

XEN - Does pygrub alter grub on dom0

I apologize for question but I did not really understand the idea behind pygrub. I've downloaded VM from stacklet.com. The image is shipped as a ext4 file and pygrub config. My question is if I can ...
1
vote
0answers
368 views

Unable to install grub to software Raid array in Ubuntu

How do you ensure Grub is properly installed on a software RAID array in Ubuntu? I have a failed RAID array on an Ubuntu 14.04 server. When I first tried booting it, the Grub screen came up, but ...
0
votes
0answers
473 views

Ubuntu 12.04.x and 14.04 Server Preseed Grub Install fails

I have servers with multiple disks on which I need to preseed Ubuntu Precise and Trusty server editions. I've tried googling and reading debain pages and blogs but could not get this working. I either ...
1
vote
1answer
96 views

How do I replace a disk with LUKS on LVM2 - no raid, no span

I have LUKS on LVM (LVM Partitions created first, then each partition is encrypted separately, following this guide on Arch Wiki). I am using two volume groups, and each is isolated to a drive. This ...
2
votes
1answer
526 views

Default kernel boot parameter on Red Hat 6 / CentOS 6

I would like to understand if, and how, it is possible to configure default kernel boot parameters on Red Hat 6 / CentOS 6 (grub legacy bootloader). I very well understand how to manually configure ...
0
votes
1answer
3k views

How to fix when grub no longer mounts the boot partition at start up?

This system has a boot partition on a dm-raid device. I updated the system by standard methods from an older Ubuntu to the latest LTS. Now, if the kernel is updated by "apt-get upgrade", the new ...
2
votes
1answer
350 views

How to boot to shell with Solaris?

I would like to boot Solaris to shell (root prompt) directly for recovery purposes. On linux I would pass a kernel option init=/bin/bash and it would directly boot me into shell without asking for ...
1
vote
1answer
379 views

Install grub on mounted kvm image?

I am trying to mount a KVM image on the host machine in order to fix a grub issue however seem to be going wrong somewhere. I have tried the following steps: mount -o loop,offset=32256 ...
-2
votes
1answer
490 views

framebuffer loads under Linux, but not Xen

I recently built a Debian "Wheezy" system, which booted via GRUB to a non-framebuffer console, printing Console: colour VGA+ 80x25 during boot. To /etc/default/grub I added GRUB_GFXMODE=1920x1200 ...
-2
votes
1answer
585 views

Empty /boot/grub/grub.conf of a remote server, how to recrete it from recovery?

My remote server (running CentOS 6.6 x64) can't boot anymore. Using the emergency recovery (a LIVE CD) i can actually look that /etc/boot/grub/grub.conf and it's empty (0 bytes). I don't know why, ...
3
votes
1answer
148 views

How to keep specific old kernels around after a yum update

I know that in CentOS 6.x, you can put the following line in /etc/yum.conf which tells yum to keep the last N kernels (by default this is set to five): installonly_limit=5 However, there are cases ...
0
votes
0answers
118 views

Grub CLI Arrow Keys Don't Work With IPMI SOL

When I am using the Grub CLI via IPMI sol I am unable to use the arrow keys, as well as some keys such as delete. What happens when I press the Left key I get random 'D' characters appearing, even ...
2
votes
1answer
81 views

Using grml with btrfs

I'm trying to boot an ISO using grml and grub on a BTRFS root. However, after selecting the boot option from the menu grub (or some subsequent loader) fails to find the iso ...
1
vote
0answers
244 views

Why is update-grub unable to find my root device?

I created a new root partition and I am trying run update-grub inside a chroot. I bindmount the following for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done And then: ...
4
votes
3answers
225 views

Modifying kernel cmdline in Ubuntu

I have a number of systems on which I need to modify the kernel cmdline, adding a few options. At the moment I do it using the following procedure: Open /etc/default/grub Modify ...
1
vote
0answers
179 views

grub: Booting Ubuntu off /boot in LVM, broken after upgrade

I have servers I want to upgrade remotely and headlessly from Ubuntu 12.04 LTS to 14.04 LTS. This upgrade has to happen via script, with no interaction. The do-release-upgrade command exits cleanly, ...
0
votes
1answer
119 views

GRUB hangs on emergency boot

I am trying to get a server going and was extremely excited when I found out it would automatically boot if the power just suddenly stopped. So if i were to unplug the server while it was still ...
1
vote
2answers
6k views

Grub rescue, will not boot from mdadm RAID, no such disk or device — mduuid wrong?

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 ...
4
votes
1answer
2k views

Cannot install grub, segmentation fault, unable to identify filesystem, superfluous RAID member, found two disks with same index — Debian 7

A server was recently transported from location A to B, a long journey that took six months. Things have gone wrong due to nothing being labeled prior to shipment. Yes, I know --- it was done by ...
1
vote
2answers
997 views

Can't get my proliant N54l to boot from USB

I was trying to install ubuntu 14. onto a usb stick. It booted fine from the USB and I went through the process for a while until I got to the partitioning bit, I was thinking maybe the install was in ...
1
vote
0answers
260 views

EC2 AMI instance store backup grub utility required

Working on backup of whole ec2 volume and image to upload to s3. Using RHEL7 and it internally uses Grub2 as bootloader. EC2 AMI tools requires grub legacy loader and I'm struck up in this loader. ...
1
vote
1answer
1k views

Linux xen directly boot windows domu? [on hold]

I have the following situation: got a new notebook with Windows7 pre-installed (sda1 with boot partition, actual OS in sda2), one physical disk (sda) created an extended partition (sda3), inside ...
0
votes
1answer
553 views

OpenSuse 13.1 GRUB2 downgrade GRUB stuck on menu

I was trying to virtualize a opensuse server and discovered that GRUB2 is not supported by VMWare, at least without some fiddling. I went into Yast and changed the bootloader from GRUB to GRUB2, and ...
1
vote
1answer
1k views

SuperMicro Superblade fails to boot from hard drive

Following issue. I have a number of Superblades with LSI MegaRAID SAS 9240-4i cards. One card per server. All of them use the latest firmware (20.13.1-0176) as of this writing (as per the LSI ...
4
votes
4answers
6k views

GRUB “Some modules may be missing from core image” Error

one HDD crashed from my RAID and I added a new HDD. Now I wanted to install GRUB to the new HDD: with grub-install /dev/sdb. I get these errors: Installing for i386-pc platform. grub-install: ...
1
vote
0answers
168 views

Verify architecture of kernel file

Note: I am NOT interested in the currently running kernel, but on a kernel that I am going to boot and which is in a file in the filesystem. I am going to boot a new kernel. I have prepared grub.conf ...
1
vote
1answer
309 views

Where to install GRUB 2 boot loader?

I have: sda and sdb which partitions is forming mirror RAID md0 md1 md2 md3 During update process, I was prompted where to install GRUB boot loader - on sda, sdb, md's or all together? What ...