By Emily / Last Updated August 14, 2019

What is track 0?

On hard disks, data is stored on the disk in thin and concentric bands called tracks. Track numbers start from 0, and the track 0 is the outermost track of the disk while the largest track number is next to the spindle and would typically be 1023. Track 0 is the area located at the start of a computer disk and usually consists of first 63 sectors of the disk. Moreover, the first sector of the track 0 is known as the Master Boot Record (MBR) and holds the critical boot code, which is necessary for booting operating system successfully. Once it is bad, that means the MBR is damaged, then you cannot access your hard drive and the Windows will fail to start.

Analysis on “invalid media or track 0 bad” error message

Sometimes when you try to format the hard drive, it fails and pops out an error message “invalid media or track 0 bad-disk unusable”, which means the disk is not detected by your computer or its track 0 is bad.

Invalid Media Or Track 0 Bad

Why it occurs? Anyway, the following issues can trigger the problem.

> hard drive connection gets loose.

> disk partition does not have a drive letter.

> there is bad sector on the disk.

> boot partition table gets lost or damaged.

> any partition is lost.

Effective solutions

Major reasons for "invalid media or track 0 bad" have been concluded, and now we will explain them one by one in detail, and tell you how to repair track 0 on USB flash drive, SD card, floppy disk, HDD and so on.

1. Check whether the hard drive connection is loose in case

If the hard disk connection is loose in the computer case, the disk cannot be detected successfully. In order to fix that, unplug your computer from the power supply and shut down the computer completely first, then open the computer case to find the hard drive and motherboard connections, check whether the connection is loose or not. If the connection gets loose and unstable, connect the cable again and ensure the hard disk is fixed stably enough. On the other hand, if it is the hard disk itself that gets loose, then some other components might be in dislocation, which will lead to much worse errors. After ensuring everything goes well, you can close the computer case and restart the computer.

2. Assign a drive letter to the disk

As we all known, if the hard disk has no drive letter, it will be invisible in File Explorer. Thus, you can assign a drive letter to it by executing below steps.

Step 1. Right click “My Computer/This PC” and select “Manage”.

Step 2. Click “Disk Management” under “Storage” in the left panel, locate the partition that doesn’t have a drive letter and choose “Change Drive Letter and Path...”.

Step 3. Click on “Add”, choose a drive letter and click “OK” to assign it a drive letter.

After that, you can see and access the hard drive from File Explorer.

3. Check bad sector

Why the disk generates some bad sectors? In addition to the low quality and aging condition of the hard disk itself, there are many other reasons. It mainly comes down to computer users’ improper operation in the daily usage. For example, if the memory is too little, then the running software or applications will access the hard disk too often. Besides, inappropriate overlocking, low-quality power, higher temperature, accumulated dust, vibration, etc could also lead to bad sector. But bad sectors cannot be found via observing and checking disk appearance with naked eyes. So we need a third-party tool to detect the bad sectors, and then fix them.

AOMEI Partition Assistant is highly recommended for that task. It is a free yet professional partitioning software for Windows 10, Windows 8.1/8, Windows 7, Vista and XP. It does a great job of checking and fixing bad sectors. Moreover, this freeware allows you to create a bootable PE disk to repair the computer under PE mode when your computer cannot boot into Windows.

  • To Create a bootable USB drive

Step 1. Connect an empty USB drive (over 8GB) to a working Windows computer, then download the freeware.

Step 2. Install and run the software on the working computer, click the “Make Bootable CD Wizard” in the left panel under Wizard column, confirm your operation and click “Next”.

Make Bootable Media

Step 3. Three ways are offered to create bootable media based on Windows PE. Here we choose USB. Click “Proceed” to finish the rest operation.

Choose USB Drive

Step 4. The process will take a few minutes. The bootable USB contains the pre-installed AOMEI Partition Assistant Standard.

  • To check bad sectors on the hard drive with bad track 0

Step 1. Insert the bootable USB drive into your computer which contains the disk with bad track 0. Restart the computer, enter BIOS to select the USB as the prior boot disk, then enter the PE mode. Once logging in, the AOMEI Partition Assistant will be running automatically. In the main interface, right click the hard drive can select “Advanced”> “Check Partition”.

Advanced Check Partition

Step 2. Select a way to perform the operation, to find the fix bad sectors, choose the first method and click “OK”.

Check Partition And Fix Errors

Step 3. Wait for the process to be completed.

Check And Fix Partition

After the bad sector detection is completed, it is necessary to back up files saved on the disk if it does have a bad sector. If the important data exists on the bad sector, please send the hard disk to the professional data recovery center to recover them. If you fix the bad sectors by yourself, the data might get damaged.

Another thing you should pay attention to is that not all the bad sectors can be fixed. If the hard disk is damaged, please contact the manufacturer as soon as possible for after-sale maintenance and replacement, so as not to delay the warranty period and cause unnecessary man-made damage.

4. Rebuild MBR

If the Master Boot Record (MBR) get damaged, you may get the error message “invalid media or track 0 bad”, “system missing” or “operating system not found” . In such cases, you can use AOMEI Partition Assistant to rebuild MBR directly.

Step 1. Launch AOMEI Partition Assistant Standard in the PE mode. Right-click the hard disk to choose “Rebuild MBR”.

Rebuild Data Disk MBR

Step 2. Set the type of MBR for Window 7/8/10 in the pop-up window. (Choose a proper MBR type according to your operating system.)

Choose MBR Type

Step 3. Click “Apply” and “Proceed” in the main interface to commit Rebuild MBR operation.

Apply

5. Recover the lost partition

Once a partition gets lost, deleted, corrupted, all data in that partition is likely to get lost at the same time. Under this situation, you can upgrade to AOMEI Partition Assistant Professional, which can help recover lost partition along with stored data in simple steps.

Step 1. Open the software, click “Partition Recovery Wizard” on the left panel.

Partition Recovery Wizard

Step 2. Select disk which contains lost partition and click “Next”.

Select Disk

Step 3. Select “Fast Search” or “Full Search” according to your requirements.

Methods

Step 4. Select the lost partition to recover and click “Proceed”.

Proceed

Step 5. Click “Finish” to exit this window.

Congratulations

6. Repair track 0 bad error with PC Tools 9.0

Step 1. Connect the bootable disk, and another disk with PC Tools 9.0 to your computer.

Step 2. Boot your system into DOS environment from bootable disc.

Step 3. Use the tool's DE.EXE command to repair the track 0 bad. Click on “Options” > “Configuration” and press “Enter” to edit track 0, disable or remove read only mode.

Step 4. Go to “Select” > “Drive Type” > “Physical” and click on the hard disk and press “Enter” to continue.

Step 5. Then, you will see the Partition Table, find the Beginning Cylinder where the track 0 starts. Then modify the number from “0” to “1”. Of course, you need to ensure the track 1 is good and press “Enter” to save the changes.

Now you can restart your computer and format the hard drive of which the track 0 is bad.

Summary

Till now, all the 5 different solutions are introduced to fix “invalid media or track 0 bad” error. Choose one based on the actual condition of your computer. Worth to mention that if you failed to format the disk with bad track 0 via Windows native tools, AOMEI Partition Assistant can also work as a powerful disk formatting tool to help you with that.