Questions tagged [mbr]

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36 questions with no upvoted or accepted answers
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355 views

Should isohybrid work on all iso media, fx Windows 7?

I have a an original Windows 7 Professional x86 iso file, straight from Microsoft. I want to make a bootable USB from this ISO. Some sources suggest that I simply dd the iso to the USB, but I don't ...
4
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0answers
574 views

backup and restore whole disk

I am using iMac, with GPT and Hybrid MBR partition table. the GPT layout is: EFI partition.(FAT32) Windows 7 partition.(NTFS) MacOS partition.(HFS+) Linux.(ext4) data.(exfat) the hybrid MBR is made ...
4
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1answer
2k views

Can't restore/reformat my USB flash drive after moving to GPT

I have 8GB flash memory stick. Sometimes ago I formatted it to be able to install Windows from it. I can't remember what exactly I did but I think I wanted to be able to install Win 7 64-bit to boot ...
3
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1answer
20k views

How to use os-prober to find MS-Windows boot data?

I saw Dual boot - Installed arch and windows entry disappeared on grub and I have the same/similar problem. I have Grub and it shows only Debian setup and not MS-Windows. I also tried the following ...
3
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1answer
548 views

How to detect if the FreeBSD disklabel is on the first sector of the disk?

I have attached a FreeBSD disk to my Linux machine. How to detect if the disklabel(aka bsdlabel) is on the first sector of the disk or the PC MBR is on the first sector of the disk and disklabel is ...
2
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1answer
494 views

Creating a ext2 partition on FreeBSD 10.1 running on x86 based box with MBR partitioning

I have old FreeBSD machine running on x86 based platform with below MBR partitioning pod0226-wsa115:rtestuser 1] uname -a FreeBSD pod0226-wsa115 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Mon Mar 10 15:25:...
2
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1answer
2k views

fdisk warning message: (Extended) Partition does not start on physical sector boundary

When I run fdisk, I get a warning message: Partition table entries are not in disk order Here is an example of the command I'm executing and its output: sudo fdisk -l [sudo] password for phil: ...
2
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0answers
269 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 ...
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2answers
40 views

Partition recovered

Partitions MBR has been destroyed accidentally by a friend, Then most partitions are unviewable which is too bad, can all the partitions be recovered? I have a text file including the original ...
1
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1answer
103 views

Significance of /sys/block/sd*/sd*/size

Disk size /sys/block/sda/size is always correct but the partition size /sys/block/sda/sda2/size is not correct if the partition type is extended, boot, etc, due to this I rely on reading MBR to get ...
1
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0answers
69 views

Encrypting hard drive containing the MBR with Veracrypt

I have three hard drives in my laptop: /dev/sdc (an mSATA drive) is where the system is installed and is completely encrypted with LUKS. /dev/sdb (for media/text files - the majority of /home) was ...
1
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1answer
314 views

How to partition eMMC with DOS MBR and align the partitions to 8 MiB

My question is related to this other one but not a duplicate, so please try to understand before marking as duplicate. I am not able to comment on this other one. In this other one, I understand the ...
1
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0answers
79 views

Setting up 2 drives with MBR with /boot as partition and / as LVM on RAID1

I am building a Fedora 26 server. It has two 320G SATA drives. I have them partitioned the same (fdisk output below). The 2nd partition on each are joined together in a standard md RAID1 configuration,...
1
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1answer
137 views

Reinstall grub on mbr without copying modules' files or config

if i issued grub-install --target=i386-pc /dev/sdx grub-install will write the bootsector to the mbr and try to copy the modules to the boot partition, i don't want that, all i want is to rewrite ...
1
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1answer
1k views

grub-install on hybrid mbr disk

I followed the very detailed guide for making hybrid MBR record (GPT/MBR) taken from here Now, gdisk says I have hybrid mbr. But I can only boot in UEFI and cannot do that in BIOS (I use external ...
1
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1answer
136 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
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0answers
109 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 ...
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0answers
3k 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 ...
1
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1answer
165 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 ...
1
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0answers
109 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 ...
1
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1answer
301 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 ...
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0answers
55 views

For what are disk signatures being used for by GNU/Linux (distributions) / grub?

I am talking about disk signatures in context of the MBR. The area from 441 to 445 bytes. For what does the GNU/Linux kernel, GNU/Linux distributions usually use disk signatures for? I only found ...
1
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1answer
176 views

understanding this DOS partition table and cloning to a new drive

I have a piece of equipment that has a motherboard in it which boots to a linux based operating system. I am interested in being able to clone this one hard drive so that in the case it fails i have ...
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0answers
28 views

In a dual-boot system, what decides which MBR bootstraping code is used?

I am reading an article titled How Computers Boot Up. In it, it suggests that a Master Boot Record (MBR) consists of "a tiny OS-specific bootstrapping program at the start of the MBR followed by a ...
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0answers
18 views

Partition Reading issue

I took DVR 2 TB hdd trying to read for data recovery. When I connect HDD on usb to win 10 it shows no information. Attached are the pics from win 10. Please advise on how to read harddisk. HDD is ...
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0answers
17 views

How to diagnose the difference in OS performance between installation media?

I have two different USB sticks, a 128 GB Samsung and a 64 GB SanDisk. I used Gnome Disks to benchmark both of them and the Samsung one was supposedly better, it had faster read and write speed but it ...
0
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1answer
738 views

How to force GPT partitions in kickstart for Oracle Linux 6

I want to configure OL6 kickstart to install a system that boots from BIOS but uses GPT partitioning instead of MBR, even for disks <2TB. The relevant part of my kickstart file looks like this ($...
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0answers
187 views

GRUB2 won't install into MBR from chroot

I got a blank screen after the "Welcome to GRUB" greetings. I ran grub-install and grub-mkconfig from a chroot, but still couldn't get to the GRUB menu. Because of the setup (former dual boot with ...
0
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1answer
700 views

Warning: Cannot find a valid bootloader location (MBR disk)

I'm trying to Install SolusOS, but I keep getting the following error message from the OS Installer: "Warning: Cannot find a valid bootloader location (MBR disk)" I followed documentation, which ...
0
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1answer
163 views

Debian unbootable for MBR and grub-efi

I run Debian Jessie (amd64) on my host. I use Debian Jessie (amd64) as guest (with qemu-kvm). I run kvm as: /usr/bin/kvm -monitor stdio \ -smp 2 -soundhw ac97 -vga std \ -...
0
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1answer
244 views

How to repair a 500GB HD showing itself as only 10MB?

I have a 500GB USB HD. I have been messing around with the dd cmd - erasing MBR data, copying my windows internal HD, eleting partitions, etc. fdisk -l returns Disk /dev/sdc: 10MiB, 10485760 bytes, ...
0
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1answer
79 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 was:...
0
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0answers
141 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 ...
0
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0answers
129 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
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1answer
10 views

Is it possible to find boundaries of a Solaris2 partition after MBR corruption?

I had disk with 4 primary partition on it with MBR (/dev/sda): - the first had a NTFS filesystem, with data (/dev/sda1); - the second was a Solaris2 partition, with openindiana (/dev/sda2 on GNU/Linux ...
-1
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1answer
77 views

Did I overwrite my Linux installation?

Background info: I have 2 physical hard drives, on the primary was Ubuntu and the secondary I had Solus installed. The Ubuntu install was installed with the partition and Home directory encrypted. I ...