Questions tagged [mbr]

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1answer
60 views

Recovering lost partition table with TestDisk

So, somehow the partition table on my disk went bananas: at the next boot the system would not start, I got repeatedly kicked in the BIOS and I had no viable boot options. The BIOS still detected the ...
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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 ...
77
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7answers
113k views

GPT or MBR: How do I know?

How can I tell whether my harddrive is laid out using an MBR or GPT format?
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2answers
55 views

How to determine if a PC has a combination of GPT disk and legacy BIOS boot, where the boot code is read from the MBR?

In a comment, Johan wrote: In the rare combination GPT disk + legacy BIOS boot, the boot code is read in the old-fasioned way from the MBR What is the proper way to determine if a PC has the ...
7
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3answers
14k views

Should I use fdisk for partitioning or GPT aware tools?

Question: Should I use fdisk when creating partitions? Or is it advisable to use parted since it uses GPT? (by default?) And with that I can create partitions larger than 2TB.
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1answer
9 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 ...
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 ...
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: ...
3
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1answer
19k 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 ...
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4answers
3k views

Are there extended partitions in GPT partition table?

Under the MBR model, we could create four primary partitions one of which could an extended partition that's further subdivided into logical partitions. Consider this GPT schematic taking from ...
3
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2answers
1k views

Why is GPT recommended for UEFI

3rd time re partitioning my 1TB SSD so hoping to get it right. Learning but still many questions Because my system has UEFI firmware and already have a SSD dedicated to Windows my understanding is ...
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1answer
53 views

Linux not booting

I have build my linux image with elbe linux build. This produces an image which can be copied to a filestorage and can be run. This works well if I use the output image and copy it with "dd"-command ...
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1answer
50 views

In GPT, can a partition be partitioned further into partitions?

I heard that GPT makes MBR's distinction between primary partition, logical partition, and extended partition disappear. In GPT, can a partition be partitioned further into partitions, in the same ...
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1answer
173 views

What do the partition table types and flags mean in the output of parted?

In the output of sudo parted -l: Model: WD My Passport 0748 (scsi) Disk /dev/sdb: 1000GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size ...
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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 ...
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1answer
87 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 ...
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1answer
98 views

Installation and booting scenarios for combinations of boot sector (GPT or MBR), firmware (BIOS or UEFI)?

I think all the confusions in this post come from coexistence of old and new technologies and abuse of terminology such as mentioned in https://en.wikipedia.org/wiki/...
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1answer
57 views

What is a generic name for the sector which stores the partition table of a disk?

If a disk uses GPT partitioning method, is its first sector still called MBR? What is a generic name for the sector which stores the partition table of a disk? Thanks.
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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
1k 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 ...
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1answer
204 views

Want MBR install of Mint 19.1

There's a video driver problem with GPT, the Apple A1286 Mid-2010 MacBook Pro machines, and NVIDIA GT330M drivers, and running Nouveau has its own problems, so I want to install Cinnamon Mint 19.1 ...
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0answers
44 views

Steps to Boot Linux from USB on Windows 10/Linux Dual Install [closed]

I'm interested in a high-level view of booting Linux from a partition separate from Windows using a USB bootloader. My work computer must have Windows 10 on it because of company policy. IT is ...
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0answers
66 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 ...
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3answers
42 views

How to find boot record of external HDD

I have an internal NoteBook HDD hooked up to a Linux machine externally via USB and want to check if this HDD has some sort of boot record on it. I have no access to BIOS and can not boot my device ...
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1answer
632 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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1answer
2k views

Backup boot record of GPT disk

I know how to use dd to backup the boot record of a MBR partitioned disk, but how do I backup the boot record of a GPT partitioned disk? (I use sgdisk to backup the partition table, but also need the ...
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0answers
177 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 ...
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2answers
124 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 ...
2
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1answer
10k views

fdisk: partition contains a ntfs signature. remove it?

I'm installing NixOs on a ThinkPad X220. Though I'm very comfortable in the shell, it's the first time I've set up my own system, and I'm running into some unknowns while trying to partition the hard ...
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2answers
44 views

Reassemble deleted MBR Partition

I have a MBR table that have a few partition that was deleted previously. What are the ways to reassemble the MBR Partition entry and restore the deleted partitions without using 3rd party tools or ...
32
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5answers
141k views

Remove GPT - Default back to MBR

I keep receiving this error: Warning!! Unsupported GPT (GUID Partition Table) detected. Use GNU Parted I want to go back to the normal MBR. I found some advice here and did: parted /dev/sda ...
5
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1answer
11k 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 ...
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2answers
19k views

GRUB menu doesn't appear after Ubuntu install alongside with Windows 10

I shrunk Windows partition, freed 100 Gb, installed Ubuntu into it, installed GRUB into into MBS of the first drive and after reboot I got Windows and with no any option to select. Even in BIOS in ...
2
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1answer
45 views

Installing Debian on a USB hdd doesn't not prompt me where to install GRUB

I'm trying to install Debian to a partition (not the whole disk) on my external HDD. I'm choosing the "Manual partition" option where I select my 100GB partition as root "/" of my external hdd. The ...
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1answer
97 views

A basic query about Linux partitioning

I'm trying to understand the partition table of my MTK-6572 based android smartphone (Karbonn-A35). The idea is to enlarge the internal Storage partition (mounted as /data) and correspondingly shrink ...
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1answer
76 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 ...
0
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1answer
68 views

can i use dd to copy my dual boot HDD(350G) to smaller SSD(120GB) with only one of two OS from HDD

I Have a dual boot machine (windows+ubuntu) with 350 GB HDD. I wish to clone only ubuntu to the 120GB SDD. How can I accomplish this. PS: I have copied Linux partition(sda5) to SDD using "dd", What i ...
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0answers
322 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 ...
5
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1answer
2k views

Can I change an existing partition from MBR to GPT?

I needed to add extra 2.5TB to the existing 400GB disk (sda) on my system. I added new virtual disks with 2.5TB (sdb), proceeded to create the partition table with fdisk. Used pvcreate /dev/sdb1, to ...
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1answer
304 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 ...
11
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4answers
34k views

Moving /boot and MBR to a new drive

I have a CentOS 6 server with two hard drives in it. My old 3TB drive has been giving me some issues so I'm moving things over to a new drive. Because my / and /home partition are managed by a LVM ...
0
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1answer
203 views

Boot Windows 7 from partition on Linux: BOOTMGR is missing

I have Debian Linux and Win7 installed on the one machine with grub loader and I need to load Windows 7 from partition with Virtual Box. Here my partiotions: # VBoxManage internalcommands ...
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2answers
624 views

I have killed my HDD

I have some trouble with my external USB 3.0 drive with 1Tb HDD. I had formatted it wrong way: I wrote /dev/sdb instead /dev/sdb1, and now I have no ability to use this drive. fdisk /dev/sdb fdisk: ...
1
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1answer
59 views

Boot problems after installing Linux Ubuntu [closed]

After installing Linux Debian on external HDD (not live Boot), is no booting possible. If I start the PC it automaticly jumps in grub-rescue. How should I fix it? On the Internal HDD is just Windows ...
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1answer
44 views

Question related to MBR

I was reading Linux boot process and stumbled upon below questions: When mbr gets write on first sector during installation.? 446 byte of mbr code will be same for either Linux or windows? How can ...
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0answers
77 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,...
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2answers
442 views

Revive HDD after murdering it with dd?

Situation: we have an old, unused laptop that we want to give to my father and mother in law but Windows kept complaining that the hard drive will fail soon, it should be changed. But unfortunately I ...
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1answer
369 views

How does MBR affect UEFI

I recently installed Linux in an UEFI laptop and installed the GRUB loader wrong (MBR based). After this the system did not start in any OS. The boot device selector still listed the UEFI devices, but ...
2
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1answer
459 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:...
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1answer
160 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 \ -...