Disk partitioning is the act of dividing a hard disk drive into multiple logical storage units referred to as partitions, to treat one physical disk drive as if it were multiple disks.

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Primary vs Logical partition

I know that you can only have 4 primary partitions on a hard drive. But if you're using less than 4, is there a benefit/penalty for using logical partitions?
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How to properly align partitions?

I'm trying to understand what are the rules for creating correctly aligned partitions. For the moment I'm playing with parted on a virtual machine, but I'm planning to move to a real hard disk when I ...
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Change the number of the partition from sda1 to sda2

I have a disk with two partitions: sda1 and sda2. I would like change the number of sda1 to sda2 and sda2 to sda1. It's possible but I don't remember the procedure. i.e. My first partition will be ...
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What's the best tool chain or single tool to transform a NTFS to ext[n] filesystem?

I've decided to go Linux only, finally! This also means that I have a bunch of disks still under NTFS. I don't have spare space anywhere to transfer the files to and then just re-format the drive so ...
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what is /boot partition really for?

I'm reading a relatively old text on linux partions and file systems, it says: Some versions of the Linux boot loaders cannot access a kernel that is outside the first 1024 cylinders on a disk. ...
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Unpack files and directories from an image created by dd?

I created an image of an NTFS partition using dd. I wonder if I can unload/unpack the files and directories in the image to any partition whose size is larger than the image size, so that I can ...
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Ignorantly dd'd /dev/sda*

I was trying to write an iso to a flash drive. I mistakenly thought that all /dev/sda* are flash drives attached to the system. I wasn't sure how to figure out which was which, so I just unplugged my ...
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Accidentally deleted the partitions on my boot disk. The system is still running. How can I recover?

I just accidentally scrubbed all the partitions from the wrong disk. /dev/sda is the boot disk, and /dev/sdb is a new disk I am trying to set up as a RAID mirror. I accidentally fat-fingered it, ...
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How to mount multiple directories on the same partition?

I am installing an SSD and would like to put / on the SSD and /home, /var, and /tmp on the HDD. My current distro is Kubuntu but I would not mind trying another distro if this procedure can be ...
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Partition not mounting from fstab

I have mounted a partition and add it to fstab file and then rebooted but I see that the partition is not mounted although it was added to fstab. What is wrong, and how can I solve it? fstab line: ...
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Why are logical volumes used with LUKS partitions?

All of the instructions I've seen on setting up a LUKS encrypted drive require using logical volumes to create root and swap partitions inside a LUKS device. Why not just put standard partitions ...
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how to use “Unusable” sectors outside defined partition boundaries

What might be a convenient way to stash some hidden data in the "Unusable" area following the last partition, or anywhere outside defined partition boundaries? For example, making it appear as a ...
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How do I check how much free space left on a device to create a partition

Let's say I have this virtual machine running: [root@centos ~]# fdisk -ul Disk /dev/sda: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors Units = sectors ...
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How do I create new partitions and format my hard drive in parted?

I'm somewhat new to working with commandline tools when dealing with partitioning, so you'll have to excuse my newness. I'm basically trying to create a new logical partition on /dev/sdb and would ...
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414 views

Is there a BSD operating system that can be booted off a logical drive partition?

From several BSD operating systems' documentation, there is a requirement for it to be booted off a primary partition. Is there any BSD that can be booted off a logical partition in some indirect ...
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FreeBSD 10 with Root-on-ZFS using only a part of the disk

I'm having a bit of trouble here. I'll try and be as concise as possible in describing my objective: I'm setting up a storage server for my employer, using two Intel DC S3500 series 120GB solid state ...
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Rearrange partitions to install a second Linux distribution

I am new to Linux and just got some foggy idea of partition tables. To be precise here it is: Model: ATA ST3500418AS (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/512B Partition ...
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How do I check if a particular hard disk is dynamic?

What commands do I have to check the dynamic or basic type disk/volumes of the Windows partitions? Topic of interest because: Warning: Don't install linux on a Windows Dynamic disk! Bug Report: ...
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Linux/GParted can see partition table but dd bs=512 count=1 can't

I have an MBR formatted sd card and when connect to a Linux machine (xubuntu 12.04) it can mount a partition and parse the file system (as can GParted). However, when I try to read the MBR from the ...
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How can I diagnose and repair missing drive space?

I have a small ext3 / partition on a 2T drive which appears to have a discrepancy in its free space. How can I determine what is causing it and how it can be fixed. After trying everything I could ...
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What's the easiest way to resize an ext4 partition from the command line?

What's the easiest way to resize an ext4 partition (or any type partition depending on the method) from the command line (potentially with the fewest commands, but also the easiest to understand)? ...
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Linux Mint freezes on startup

Premise I am running Linux Mint on my sister's computer. Everything was working fine, but than one day she turned it on and she got a strange message she didn't understand. I think it was some kind ...
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Why do some of my lvm partitions have “-real” appended to their names?

In the /dev/mapper directory I can see my lvm partitions, but then I'll see some other ones with the same names, but with "-real" appended to them. What's that about?
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How to resize an LVM partition at the beginning

I have resized lvm partitions in the past, but after the resize there is space at the end of the partition. What I want to achive is to have the space at the beginning of the partition instead. The ...
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Partitions same size but different block [closed]

I tried to backup my partition using dd on another disk and I created a partition of the same size. When I finished the copy I had problems mounting the partition since I got bad geometry: block ...
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If I have an SSD and a hard disk in a system, can the SSD act as cache for the hard disk?

Say I have some partitions; one on a SATA drive and one on an SSD. I want to create a "virtual" hybrid disk. Is this possible?
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How can I expand ext4 partition size on debian

I have a drive with this configuration: fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size ...
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Create a partition from a directory

I have a Linux system with only one partition /dev/sda1 on /dev/sda disk with / mount point. Is it possible to create partitions after installation? e.g. create /dev/sda2 with the mount point /home/ ...
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Remove /var partition and replace it with /var into / (root) partition

I accidentaly created a /var partition and I'd like to get rid of it. Is it possible to remove this partition and use the / partition to contain /var without reinstalling the OS or do I have to ...
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When and why do block devices need to be partitioned? [duplicate]

Possible Duplicate: The merits of a partitionless filesystem So I've got a block device, say /dev/sda or /dev/loop0. Clearly if I want to boot from the former, or I want to subdivide it ...
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Will my programs installed in Ubuntu be usable by another distro in a dual-boot set-up?

I am interested in setting up my machine so that I can try different distributions of Linux. I want to always be running Ubuntu (10.04.3), but would then try other distros in a dual-boot setting. ...
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Filesystems and Partitions

I have been reading up more on UNIX and have brushed up on different filesystems and partitioning HDs. In the book it mentioned that filesystems are very much different than partitions and one ...
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How we can avoid rebooting the system after partition change with fdisk?

When modifying the partition table, fdisk usually returns the following error message: WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still ...
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What happens to partition labels after removing a partition?

What will happen to all the remaining partition labels if I remove a single partition? For example if I have a layout that looks like this: /dev/sda1 /dev/sda2 /dev/sda3 /dev/sda4 /dev/sda5 and if ...
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Why would I want to create more partitions if RHEL will only recognize up to 16?

During some basic RHEL training, I came across this blurb: Although it's possible to create more, RHEL will recognize only up to 16 partitions on any individual SATA, SCSI, PATA, or virtual hard ...
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How can I script the creation of a single partition that uses the entire device?

I am specifically using this to partition and mount EBS volumes on Amazon EC2 instances, but really this should be generally applicable to initializing any new drive. As the question says I want to ...
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Backup of LVM2 logical volume

I'd like to make backup on external drive of LVM2 logical volume in dd manner. Approach I consider is to make lv on extranl drive with identical size copy with dd (Please let me know if you see ...
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How do I permanently mount a separate partition as folder in a separate home partition?

I'd like to create the following situation: A separate partition for my user's home directory, A second separate partition for ~/Documents, and A third separate partition for ~/Videos and ~/Music. ...
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What is the effect of deleting utility manufacturer partitions?

I am about to erase everything off of my hard drive and install Linux Mint I'm doing this on a Dell laptop, there is a Dell utility partition that I have never used... I have seen these on other ...
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Why are partion size and df output different?

I have a partition /dev/sda1. Disk utility shows, it has capacity of 154 GB. df -h shows Filesystem Size Used Avail Use% Mounted on /dev/sda1 123G 104G 14G 89% / devtmpfs ...
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Hard drive/device partition naming convention in Linux

What is the hard disk drive/device partition naming convention in Linux? For example, [hd0,0], sd0, etc. What does it actually mean? What is the significance of this when i need to install multiple ...
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Partially overwrote /dev/sda, can I recover anything?

I was messing around with my new hard drive, which only contains some personal files, and to check its write speed, I typed: sudo dd if=/dev/zero of=/dev/sda, /dev/sda/ being the new 2 TB connected to ...
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How can I partition a volume in a regular file without loop?

I'm trying to play around with OS development, and I started with a boot loader, where phase 0 loads phase 1 from a file (specified by inode) on an ext4 partition (specified by first LBA). Of course, ...
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Fully seperate two accounts without installing seperate operating systems?

Our class is finally installing Mint Linux on our machines. The problem is our teacher is scared that we'll play war games against the two classes that use the computers. His solution is to install ...
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Install Debian over Ubuntu using same home partition

I'm interested in changing from Ubuntu to Debian. I currently have 12.04LTS installed on its own boot partition which is separate from the /home partition. I would simply wipe the Ubuntu partition ...
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What are the ramifications of not having a valid partition table?

I recently upgraded my Ubuntu from 11.10 (Oneiric) to 12.04 (Precise Pangolin) on a Dell Inspiron B130 Laptop. When I run fdisk -l it says that my HD doesn't contain a valid partition table. I have ...
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How to resize an IMG file's partition info?

I made an ISO this way: sudo partimage save /dev/sdc1 /media/56AE8240AE82191F/Backup/xfcefat.iso The resulting iso file is very small but when mounted I see that it has correctly preserved the ...
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Reading a filesystem from a whole disk image

I ran these commands: VBoxManage clonehd d6b9f0a5-98df-48ca-83c8-91a0809ec349 --format RAW Debian.raw sudo dd if=~/.VirtualBox/HardDisks/Debian.raw of=/dev/sda5 When I try to mount the partition, I ...
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CentOS can't use new extented space on system disc

I have CentOS installed in my VirtualBox and there was small HDD for the system itself(about 8-9GB). After some time of using this, this virtual disc got full and I couldn't install updates so I ...
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How to change the volume name of a FAT32 filesystem?

I know I can set the volume name when I format the partition with the -n option of mkfs.vfat. But how to just change the name without formatting? I especially want to be able to use lower and ...