The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
0answers
7 views

Get correct Windows partition back in Grub

Model: HP Compaq Mini 32 bit. Device: Samsung Evo SSD 120 GB. OS: Dual boot --> Linux Mint 17.1 Xfce & Windows 7 Starter. TLDR: Fixed Grub + got Mint back using parted rescue; win7 reboots or ...
0
votes
0answers
15 views

CentOS 7 grub option is missing after upgrading windows 8 to 10

My system was dual booted with CentOS 7 and Windows 8. After I reinstalled the latest Windows 10 Pro and removed windows 8, my system is only booting with Windows 10 as the Grub2 is not appearing at ...
4
votes
1answer
54 views
+100

How to understand partition table on hybrid ISO image?

If I inspect an hybrid ISO with tools like fdisk and gdisk, then looks like hybrid ISO has both the MBR and GPT in order to support both the BIOS and UEFI: # gdisk -l /dev/sdb GPT fdisk (gdisk) ...
1
vote
2answers
19 views

alignment of extended partitions

I read an article on aligning file-systems on partitions and this said that: When manipulating MBR disks, be aware that the alignment of extended partitions is unimportant. These partitions hold ...
0
votes
4answers
61 views

MBR size is 440 bytes or 512 bytes

I remembered reading one question how would you back up the MBR of a disk. Two of the choices are dd if=/dev/sda of=/dev/sdb bs=512 count=1 dd if=/dev/sda of=/dev/sdb bs=440 count=1 and the ...
1
vote
1answer
42 views

Using dd in order to save and restore a boot sector?

Through some legacy code I'm using dd to save and restore (parts) of a bootsector after unzipping the .iso of the system onto the hard drive (from a live cd). I use the following command to save the ...
0
votes
3answers
50 views

changing grub boot drive

I just installed a new SSD and I want to move all the files from the HDD to my SSD. I cloned the partitions from the hdd to the ssd. I run on a dual boot - windows 10 and ubuntu 15.10. So, now I have ...
0
votes
1answer
26 views

mkfs.vfat creates multiple MBR signatures

I am creating a FAT32 partition from a file image. My commands are as follows: Create a 2MB file image. dd if=/dev/zero of=fatfs.img bs=1024 count=2048 To create the filesystem I use: mkfs.vfat ...
2
votes
1answer
27 views

LUKS on an internal hard drive

I have a hard drive which is encrypted using LUKS. It was originally an external hard drive. Recently I removed the casing and connected it directly (via SATA). However, when I connect it directly, ...
0
votes
0answers
62 views

Unable to get past grub or BIOS

I have an Asus X200CA. It came with DOS. I installed Linux Mint (which is based on Ubuntu). It was working well until one day a USB stick was pulled out without removing it safely. At the next bootup, ...
0
votes
0answers
54 views

rEFit on Mac with OS X doesn't detect Linux boot partition

I've followed this guide and installed a dual boot Kali Linux on my MacBook Air using a hybrid MBR. Everything went smooth, but after finishing, the rEFit menu doesn't offer Linux as an option for ...
1
vote
1answer
37 views

gpart finds partitions but puts zeroes on all their specs

So this isn't my hard drive I'm working on so I'm not too sure how it got into this state. My friend had Windows XP on it and wasn't using it much then suddenly it wouldn't boot anymore. He just wants ...
1
vote
0answers
48 views

Repair File System After changing the partition structure

I have dual booted linux centOs with windows. Now I changed the partition structure of linux with a partedMagic live CD. Since I have used the EasyBcd to make the boot menu on windows, I can still ...
0
votes
0answers
159 views

installing kali linux in mbr (not gpt)

I previously dual booted kali and windows 7. There was no problem with that. Then I removed both of them and partition the drive using fdisk(for MBR). I cannot use GPT partition as my BIOS does not ...
0
votes
1answer
114 views

Arch Linux: GRUB does not load after installation

I have installed windows 10 in my laptop in BIOS Legacy mode.I have 3 primary partitions including the Windows partition and have extended partition with 2 more logical partitions. Now for installing ...
1
vote
1answer
32 views

GRUB rescue mode - where does it live?

My understanding is that when I install GRUB, a primary OS loader gets written to the MBR and a secondary OS loader (the bulk of GRUB) gets written to some other partition. In normal operation, the ...
0
votes
1answer
32 views

install grub but no booting

I'm having trouble installing grub. I used to have a UEFI boot setup but it constantly failed so I decided to use normal boot instead. Unfortunately, the system doesnt boot into grub. What I did ...
1
vote
0answers
640 views

Kali Linux doesn't detect my hard drive partitions

I wanted to install Kali Linux on my computer that is currently running windows 7 64bits, so I created a 200Gb free partition, made an installation USB key, and everything was running perfectly during ...
0
votes
2answers
65 views

How to back up a MBR

Has anyone tried updating to Windows 10 on a dual boot machine? I'm concerned that Windows 10 might mess with the MBR. Is there a way to preserve the MBR and easily restore it if Windows in fact ...
2
votes
2answers
271 views

How to construct a GPT-only partition table on Linux?

All of the tools I've tried until now were only capable to create a dual (GPT & MBR) partition table, where the first 4 of the GPT partitions were mirrored to a compatible MBR partition. This is ...
0
votes
0answers
71 views

Dual booting Ubuntu and windows 7

I am trying to dual boot Windows and Linux on a machine at work. While I haven't used windows in a while, It is a process that used to work most of the time. But I haven't been as lucky with this ...
3
votes
2answers
115 views

Advantage of GPT over MBR partition table [closed]

What is the advantage GPT partitioned hard drives on older BIOS system ? when boot drive is bellow 2TB on a BIOS system or UEFI boot disabled grub on BIOS system with GPT partitioned needs an ...
3
votes
1answer
274 views

Can't format HDDs and install linux to Dell hybrid ultrabook

I've tried installing OpenSUSE 13.2, Debian 8/8.1 and Ubuntu 15.04 (all them amd64). Debian/Ubuntu won't show disks and OpenSUSE can't format the partitions created on them. During the install, ...
0
votes
0answers
503 views

“Warning! Secondary partition overlaps the last partition by x blocks” in gdisk, is it safe to use gdisk here?

I'm trying to install convert my hard drive into GPT using gdisk, when I run sudo gdisk /deve/disk1s4 I get this: Warning! Secondary partition table overlaps the last partition by 2032668853 blocks! ...
0
votes
1answer
135 views

How to set MBR to Linux Partition instead of GRUB

I have a Linux Mint 17.1 Partition at /dev/sda1 and another Mint 17.1 Partition at /dev/sda5. How do I set the MBR to boot into /dev/sda1 instead of the GRUB menu? I know how to use GParted to delete ...
0
votes
0answers
17 views

Problems MBR and GPT Partitions on a Linux Host on SLPOS

Ive a Host loaded with SLPOS Image from a SLPOS Branch Server (SuSE Linux Point Of Service) and i want to handle this issue, when system boots it download a PXE who does a check of a several checks ...
2
votes
1answer
113 views

How to reduce ext4 rootlv on centos 6

Is there a way to perform a safe reduce in rootlv at rescue mode? Most of the internet's explanations tells, basically, that it can be done using the following steps sequence: vgchange; fsck; ...
1
vote
1answer
490 views

Remove all traces of GPT disk label

I've got an USB pen drive and I'd like to turn it into a bootable MBR device. However, at some point in its history, that device had a GPT on it, and I can't seem to get rid of that. Even after I ran ...
1
vote
1answer
87 views

OSX: MBP: How does system detect sd card inserted?

I have a MacBookPro running Mavericks. I can insert one sd card into the slot and it mounts just fine. Another sd card I slip in and nothing happens. It does not appear in disk utility. It does ...
0
votes
0answers
99 views

Change default OS loading

Installed Ubuntu 12.04 Feb 2014 - upgraded to 14.04LTS. I believe there is still remnants of older OS's still there somewhere, (they appear on the Grub multi-boot menu at start up). An earlier ...
2
votes
0answers
139 views

Accidentally installed BIOS/MBR on GPT/UEFI

Quite some time ago, I installed a Linux system on my moms laptop. And just recently I noticed I have installed and partitioned (with fdisk) a BIOS/MBR on a system, that already has UEFI. The machine ...
0
votes
0answers
57 views

What are the [internal] steps involved in making USB drive 'bootable'?

Whenever I have to install a new Linux distro, I create a bootable USB from the distro image using some specialized program like UNetBootin. Recently, I tried to do for Fedora using 'dd' command, but ...
1
vote
2answers
45 views

MBR and data on pendrive

I have a pendrive (/dev/sdd). I ran fdisk -l and that shows me the drive and its partitions. After that I did: dd if=/dev/zero of=/dev/sdd bs=512 count=1 I deleted the MBR (so the partitions ...
0
votes
1answer
316 views

unbootable usb stick “Non-system disk or disk error”

All, I have a USB stick that used to boot fine. I thought I'd reuse it. Reformatted it, copied some files over, and now it won't boot. I've used "lilo -M /dev/sdc mbr" with no luck. Note that the ...
0
votes
2answers
49 views

Is my server still using a grub-legacy (GRUB 1) MBR?

When Debian updated to GRUB 2 (package grub-pc), it didn't automatically upgrade the MBR. Instead it configured the old GRUB 1 installation so that it will chainload GRUB 2; that way administrators ...
1
vote
0answers
39 views

Dual-boot ends with Dual-Bootloaders

Having just bought a new laptop out of necessity, and ending up with Windows 8.1, because I work from home and the company only supports windows, and the identical 7 machine was almost $100 more than ...
0
votes
1answer
81 views

Backup and then wipe partition table from head of drive

I have a NTFS hard drive internally attached to my computer and it's causing problems with the other Windows installation on my dual (or triple?) boot machine. I'm not sure if the partition scheme is ...
2
votes
1answer
7k views

Creating EFI bootable GPT partition with gdisk on previous MBR, GPT Damaged

So this is a sister question to my previous one about partitioning for a UEFI boot loader. Parititioning for a UEFI boot loader, can LVM be used? Disclaimer: I don't give a flip about the data on ...
0
votes
1answer
35 views

MBR not corresponding to fdisk -l?

I'm trying to map the shown with sudo fdisk -l and what is written in the MBR. However they seem to differ. What fdisk shows: Device Boot Start End Blocks Id System /dev/sda1 ...
2
votes
2answers
1k views

Transforming a disk from MBR to GPT

I have a disk with classic MBR and want to transform it to use GPT without data loss. I have seen several more or less useful tutorials, but most of them are dealing with the specific problems related ...
3
votes
1answer
2k views

How to dual boot PC-BSD 10.3 (with zfs file system) and debian 7 (crunchbang) using grub2 boot loader in MBR?

I want to dual boot PC-BSD 10.3 with ZFS as the root file system (the only file system) with Debian 7 (crunchbang linux) with ext4 using grub2 boot loader installed in MBR and grub is managed by the ...
1
vote
1answer
142 views

hexedit: change number of columns (bytes per line)

I am using hexedit to show/edit disk MBR (512 Bytes, copied with dd). When I open the file, hexedit displays the file as 9 columns, 4 bytes per column (36 bytes per line). That is very unfortunate. I ...
1
vote
1answer
1k views

Understanding syslinux and partitioning

I am trying to learn and especially understand how partitionning and boot-loaders work. The problem is that I got it all twisted in my mind. In the end I don't understand anything anymore. I know ...
1
vote
0answers
79 views

Two fdisks seeing different MBRs on same external drive (OpenBSD 4.2/5.5)

I'm trying to use an external USB hard drive to copy data between a legacy production OpenBSD 4.2 system (on a slow, fragile network — that's not an option) and a new OpenBSD 5.5 box, and I'm running ...
2
votes
1answer
2k views

How to move GRUB installation to a different partition?

I have a laptop for work. I originally had Windows 7 on it then I installed Linux Mint 17 to dual boot. During my installation of Mint 17 I accidentally installed GRUB on the wrong partition (sda2). ...
0
votes
1answer
188 views

If MBR is broken, how to fix on RAID + LUKS encryption?

Problem: After HDD failure in a Software-Raid Mirror Debian does not boot. Only black screen with blinking _ Debian Setup: Within the raid I have a complete system encryption with luks. I am not ...
1
vote
1answer
2k views

How to install after windows 8.1 with MBR partition

I have a laptop, which has a 500GB hard disk and with MBR partition, and I install my windows8.1 on it, but I left ~75G unused which I would like to use it for OpenSuse13.1. Now I have 2 USB, one is ...
1
vote
2answers
3k views

Installing GRUB in a dual-boot

I've just installed my OSes on a new HDD: Windows 7 and Debian 7. As usual I first installed Windows, then Debian. At the first attempt, GRUB seems to not have been installed properly, because my ...
4
votes
2answers
524 views

How to create MBR partition /dev/ nodes FreeBSD for mounting

I currently have FreeBSD version FreeBSD 10.0-RELEASE. Installed using a ZFS root. I'm attempting to mount a MBR partitioned drive but I can't get the partition nodes, /dev/ada4p1, etc. The partitions ...
1
vote
1answer
174 views

Grub2 on wiped MBR

I'm trying to test grub2 on puppet in a VM and one of the tests is to make sure it'll still work on a wiped MBR. So I wipe the MBR with dd if=/dev/zero of=/dev/vda bs=512 count=1 Then I try to ...