Booting is the initial set of operations that a computer system performs when electrical power is switched on. The process begins when a computer that has been turned off is re-energized, and ends when the computer is ready to perform its normal operations.

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none of the f-keys work to get into boot menu or bios [migrated]

I have a lenovo V570. I had a dual boot of ubuntu/windows8 using GRUB. I happened to mess up my ubuntu system and the ubuntu option has disappeared from the GRUB menu. I still have the ubuntu flash ...
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13 views

Booting from an lvm-cached volume [on hold]

I created a cache pool following this article. The process seems to be successful. After doing an upgrade-grub and rebooting, Grub complains that it can not find the root volume (showing a UUID). - ...
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1answer
17 views

debian unable to automount partition at boot

I have a single usb drive connected to my server, and I am unable to get it to automount at boot time. If I manually execute mount -a it mounts correctly. my fstab is as follows: proc ...
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1answer
30 views

Windows 2012R2 hyper-v guest diskless - boot from iscsi guide?

I am attempting to build a generation 2 W2012R2 hyper-v server guest that, configured with no disk or vhd , will select it's iscsi o/s disk via Microsoft dhcp and boot Windows 2012 R2. Note that I ...
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0answers
13 views

unable to open luks encrypted device (wrong password) [migrated]

I'm using CentOS 7 with a luks encrypted root partition. Usually I have to type my password during boot, but sometimes the system doesn't accept it. It reacts as it was wrong, but it isn't. I did not ...
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1answer
33 views

RHEL7 server won't boot after restart - “Failed to start LSB”

I have a RHEL7 server that has been running for the past couple weeks, but it won't come back up after a restart now. I have daily snapshots, but all of them seem to be affected by the same problem. ...
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1answer
38 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, ...
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22 views

CentOS 7 Crash on boot [migrated]

Getting this message attempting to boot CentOS 7 BUG: unable to handle kernel NULL pointer dereference at 000000000000009B And then a kernel panic Happens when trying to boot from the OS HDD or ...
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69 views

INACCESSIBLE_BOOT_DEVICE on Hyper-V 2012 R2 virtual machines

I have a Hyper-V 2012 R2 cluster, 4 Dell PowerEdge R620 servers connected to a Dell PowerVault MD3600F storage array by means of FC connections; it's all pretty straightforward, all servers run ...
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0answers
16 views

Desktop system doesn't always hit BIOS [migrated]

I have a desktop system that ran fine for months, but now it doesn't even hit BIOS most of the time. I've replaced a battery on the motherboard (CR2032) and the power supply, and the behavior hasn't ...
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16 views

Sun Netra 240 not booting to ALOM

I inherited a Sun Netra 240 with no OS installed (indeed, with no hard drives). I did some googling, and came up with a few manuals, all of which I downloaded: Netra 240 PROM Guide Netra 240 ALOM ...
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1answer
12 views

Modify Clonezilla boot parameters on generated images/ISOs

I can take a Clonezilla-generated ISO and extract the contents, then manually edit the syslinux.cfg (and other .cfg's) to adjust the boot parameters after creating the ISO, then repackaging it up. ...
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0answers
31 views

Windows Server 2008 R2 - boot mode issue

Ive a little problem with Server 2008 R2. Recenly ive stuck in safe boot loop, after few tricks i was able to login to server, but right now i cant select Normal Boot mode. When I'm selecting this ...
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0answers
14 views

Disabling PCIE_ASPM using UEFI without GRUB [migrated]

I'm encountering issues with my wireless adapter (Intel AC7260) while running ElementaryOS Freya Beta 1. I've read that setting pcie_aspm=off has helped others before, and I would like to try this, ...
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1answer
148 views

Windows 8.1 stuck in Automatic Repair boot loop - Proxmox VE [closed]

I installed Windows 8.1 64B in a VM on Proxmox-VE. It was running fine for a few days until it needed to be rebooted (updates). First I tried reinstalling the OS which worked, until it needed to be ...
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2answers
40 views

Create an MBR on secondary plex

I have a HP Proliant ML350 g6 server running windows 2008 std R2. This server had two hardware arrays in it. One array was a raid 0 with 1 physical drive running raid 0. The other array is 5 physical ...
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1answer
29 views

mbr and boot sector overwritten with structured yet very odd data

I work for a web-hosting datacenter. One server was having issues with its RAID, and we were attempting to reboot into single-user mode to repair a read-only /tmp Upon rebooting, the server wouldn't ...
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0answers
29 views

mdadm/grub2/lvm boot failure if all drives are physically connected

Weird problem here. I've got a Debian 7 server (quad core, 32GB RAM) that runs a whole bunch of VMs. The main boot drive is a RAID 1, with an LVM volume group called System, which contains a bunch of ...
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0answers
119 views

Ubuntu on EC2 boot error after dist upgrade to 14.04: disk drive for / is not ready yet or not present

I just upgraded my Ubuntu 11.10 EC2 instance to 12.04, then to 12.10 and finally to 14.04 using the do-release-upgrade command each time. I arrived at 14.04 and the instance will not boot now, it ...
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0answers
21 views

Boot from ISO on Remote Server with RAID (Ubuntu)

I have tried to boot from an iso file with GRUB but it does not work. The problem is that grmf-rescueboot and other standard systems don't work with a Software-RAID (mdadm). So how can I boot from an ...
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1answer
65 views

How to create a bootable ISO image from a disk snapshot

I've taken a disk snapshot of my Ubuntu VM from Amazon EC2. The snapshot is a ZIP archive of the whole disk. I've downloaded and then extracted the snapshot. Now I would like to create a bootable ISO ...
2
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1answer
143 views

ESXi 5 Hypervisor fatal boot error

For over 2 years now I've been running ESXi 5 just fine from a pen drive. I recently had to move the server to a new location and started seeing an issue. Once the system starts to boot, I get: ...
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1answer
89 views

Debian server not booting after software RAID-1 array degraded

So I have a Debian 7 server with 3 hard drives. Its RAID-1 is basically configured this way: md0: sda1, sdb1 --> / (root) md1: sda5, sdc1 + sdb5 (spare) --> /data (sdc1 is on a SSD, and sda5 is ...
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2answers
144 views

Xen Server, Ubuntu VM increased disk size, now will not boot

Citrix XenServer 6.2 Running Ubnutu Server 14.04 It had a 300GB disk attached, using XenCenter I increased the disk size to 500GB, planning on using gparted to resize the partition. Now it will not ...
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39 views

Execute a script while boot up in RHEL7

One of my server reboots every sunday and monday morning, whenever the server is up I need to do a service restart. Actually I call a script to execute itself (everytime manually). What I want to ...
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8 views

partclone.restore: progress report goes out of box

I am running partclone.restore using the "-N" option, which draws progress in a dialog-like box. If I run this command within the autorun of systemrescuecd (4.3.1), then part of the display text goes ...
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1answer
36 views

rc.local, call commands sequentially (one after finishing the other)

I was expecting that in rc.local, If say I call program P1 in one line and then P2 in the following line, P2 would only be executed after P1 (on which it depends for successful execution). This is the ...
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0answers
72 views

Booting XenServer Installer on USB

I'm trying to install XenServer on a system that has no CD-ROM drive (it only has a USB) I'm able to successfully boot the server using a bootable USB that boots up Linux (specifically, the GRML ...
2
votes
1answer
46 views

Installing boot manager to a raw LVM physical volume

Is it possible to install some boot manager to disk with raw physical volume inside (i.e. no partition table)? I tried LILO and LVM volumes became inaccessible (due to LVM structures corruption). Boot ...
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2answers
50 views

Windows 2008 R2 Boot-from-SAN Migration Methods?

We are running Windows Server 2008 R2 Enterprise on a Cisco UCS B200 M3 blade server that is diskless. Currently, we are going through a EMC SAN lifecycle/upgrade. I need to perform this migration ...
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1answer
80 views

Single user mode boot stuck

I have an old Ubuntu box with an unknown root password. It boots fine in regular mode, but it gets stuck when booting to single user mode: For searchability, the last few lines are: Begin: Running ...
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1answer
81 views

Freshly installed CentOS does not boot from Dell's Perc H700 RAID

Installed a fresh CentOS 5.10 installation on RAID5 provided by Perc H700 Integrated RAID, however the system fails to boot. Checked the system via recovery CD, and noticed that CentOS 5.10 now uses ...
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2answers
425 views

Windows Server 2008 R2 with Mirrored Disk Booting to Black Screen

I've got a Windows Server 2008 R2 device with 2 disks formatted as Dynamic Mirrored disks booting to a black screen. Upon booting the machine goes through the standard checks and then gets stuck at a ...
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2answers
60 views

/boot partition filled - updates will not complete

my last update failed because /boot did not have room for the new kernel (or so I guess). Can I safely use rm to blow away the old vmlinuz.*-generic? Thanks
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2answers
326 views

Linux xen directly boot windows domu?

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 ...
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1answer
37 views

Auto starting rc at startup

So here are the steps i am following . So i add a conf file inside /etc/init.d/myconffile And then to get System start/stop links i have to use the command sudo update-rc.d myconffile defaults 99 ...
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2answers
53 views

Upgrade key not present?

I have a DELL PowerEdge R520. On boot, just after loading the RAID Controller, I get a weird message: "Upgrade Key Missing! An upgrade key was present on a previous power cycle, but it is not ...
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1answer
282 views

How to access a system with write permission after file system check fails?

I created three new partitions, but after a reboot, the system is being dropped to a shell: /dev/mapper/group-newpartition: clean, 11/655360 files, 276620/2621440 blocks [FAILED] An error occurred ...
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2answers
543 views

Can PXE boot of Hyper-V VMs be disabled?

Hyper-V virtual machines have the ability to PXE boot. Obviously, PXE boot raises some security concerns. The problem is, unlike a typical physical machine's firmware, there isn't an obvious way to ...
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1answer
37 views

Dynamic dependencies in systemd

I am trying to figure out how to specify dynamic dependencies for systemd that are specific to the current instance@. In the [Service] section I can use EnvironmentFile= to load in variables using the ...
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2answers
86 views

Boot to CD image over network [closed]

I have multiple diagnostics CDs that I want to avoid making twenty copies of for the sake of time and convenience. I figured a good way to do this would be to boot an image of the necessary CD over ...
4
votes
1answer
556 views

How to set systemd service dependencies?

During CentOS 7 system boot nginx start fails with the following error: 2014/08/04 17:27:34 [emerg] 790#0: bind() to a.b.c.d:443 failed (99: Cannot assign requested address) I suspect this is ...
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0answers
37 views

'Boot' folder was accidentally deleted from WinServer 2008 R1

Unfortunately, the 'Boot' folder in Windows Server 2008 R1 (not R2!) has been erroneously deleted. Now I'm seeng a message that Windows can't be started. Fortunately, I have a copy of the whole disk ...
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0answers
580 views

How to debug why systemd is idling and is not going on with the boot process?

I am trying to create a PV instance for AWS EC2. The template VM is based on CentOS 7, which is using systemd. The disk layout is two partitions: /boot (/dev/xvda1) and LVM2 (/dev/xvda2). The root ...
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2answers
1k views

FreeBSD 10 won't boot to ZFS root after power failure

While installing new hardware today, I involuntarily disconnected the power to one of our servers. This server is running FreeBSD 10 with Root-on-ZFS as offered by the installer. It has a total of 36 ...
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3answers
2k views

Is it safe to reboot a server open to the internet?

Specifically I have an iptables ruleset defined on a server running CentOS. Am I guaranteed / can I guarantee / how can I guarantee that when networking comes online (either at machine boot, or after ...
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0answers
110 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 ...
3
votes
2answers
244 views

Server won't start. IPMI showing Blue Screen with Ubuntu Linux

I have a remote SuperMicro server that is failing to boot. It's located on a different continent and access is limited. I can get into the BIOS and do whatever I need to, but as it gets through the ...
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1answer
354 views

Can I PXE-boot a desktop PC into a Hyper-V VM? [closed]

I just started exploring Server 2012, and the Hyper-V features are compelling for my place of business. Here is the question: We have several computers around the facility currently running XP and 7. ...
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1answer
136 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 ...