partition find and mount disk size is wrong

When working with disk partitions in Linux, it's not uncommon to encounter issues related to incorrect partition sizes being displayed or recognized by the operating system. This can lead to a range of problems, including difficulties mounting or accessing certain drives, data loss due to mistaken deletion of important files and folders.

In this article, we'll explore some common reasons why you might experience 'partition size is wrong' errors in Linux and provide step-by-step instructions on how to troubleshoot and resolve these issues using both command-line tools like `fdisk` as well as graphical user interface (GUI) applications such as GParted. By the end of this article, you'll be equipped with the knowledge necessary to manage your disk partitions effectively within a Linux environment.

Reasons for 'Partition Size Is Wrong' Errors

There are several reasons why you might encounter errors related to incorrect partition sizes in Linux:

1. Disk Not Properly Recognized: Sometimes, due to hardware or driver issues, the operating system may not recognize one or more physical drives connected to your computer.

2. Incorrect Partition Table Configuration: If the partition table on a disk is misconfigured or corrupted, it can lead to incorrect size readings by Linux.

Troubleshooting and Resolving 'Partition Size Is Wrong' Errors

To troubleshoot and resolve these issues in Linux, you'll need access to either a working terminal window (via `Ctrl+Alt+F1` or equivalent depending on your distribution) or an alternate installation media such as a USB drive or CD/DVD with a live version of the same operating system installed.

Method 1: Using Command-Line Tools

If you prefer using command-line tools, here are some steps to follow:

### Step 1: Identify All Available Disks

Firstly, identify all available disks on your computer by running `lsblk -D` or simply `fdisk -l`. This will list out each disk device (e.g., `/dev/sda`, `/dev/nvme0n1`) along with its size and other details.

### Step 2: Run fdisk to Inspect Disk Geometry

Next, use the following command to run `fdisk` on a specific drive:

```

sudo fdisk /dev/DEVICE_NAME

```

Replace `DEVICE_NAME` with the actual device name of the disk you want to inspect (e.g., `/dev/sda`, `/dev/nvme0n1`). This will launch an interactive text-based interface for managing partition tables.

### Step 3: Verify Disk Geometry and Fix Issues

Within fdisk, type 'p' followed by Enter key. This will display a list of partitions on the selected disk along with their sizes in bytes, kilobytes (KB), megabytes (MB) or gigabytes depending upon your system's unit settings.

If you notice any discrepancies between reported size values and actual space usage as shown under the 'File System' column for each partition entry:

* The easiest solution would be to simply delete all partitions using 'd', then recreate them with correct sizes using `m`, followed by Enter key, select 't' for type (e.g., 83 for ext4), and finally write changes out before exiting fdisk.

### Step GParted GUI Alternative

Alternatively, you can use the graphical user interface provided by Gparted to manage your disk partitions. Here are some steps:

1. Install GParted

If not already installed on your system, install `gparted` using your distribution's package manager (e.g., `sudo apt-get update && sudo apt-get install gparted` for Ubuntu/Debian-based systems).

2. Launch GParted and Select Target Disk

Open a terminal window and run the following command to launch GPartet:

```

gparted /dev/DEVICE_NAME

```

Replace `/DEVICENAME` with the actual device name of the disk you want to manage (e.g., `/dev/sda`, `/dev/nvme0n1`). Select the target drive from the list displayed.

3. Verify Partition Sizes and Fix Issues

In GParted's main window, double-click on a partition entry whose size does not match its expected value as shown in the 'Size' column at the bottom left corner of the GUI interface:

* If you notice any discrepancies between reported size values and actual space usage as indicated under the '% Used' bar for each partition:

* You can either expand or shrink the selected partition using the plus (+) or minus (-) buttons located above it.

* Alternatively, if necessary, completely delete all partitions on this disk by right-clicking (or pressing `Ctrl+Right Mouse` depending upon your desktop environment), then selecting 'Format' from the context menu.

In conclusion, 'partition size is wrong' errors in Linux can be frustrating and potentially data-destroying issues. By understanding why these problems occur and how to troubleshoot them using both command-line tools like `fdisk` as well as graphical user interface applications such as GParted, you'll be better equipped to manage your disk partitions effectively within a Linux environment.

Remember that prevention is always the best cure; regularly backing up important data across multiple storage media (e.g., external hard drives, cloud services) will help ensure business continuity in case of hardware failure or other disaster scenarios.

Partition find and mount disk size is wrong