Disk 0 Not Initialized, Unknown, Incorrect function.

Question

I've had this spare HDD since October 2023, and the next year it just stopped working. It doesn't have any important files or anything, but it is a few terabytes of space I'd like to have spare.

Every time I try to initialize it, it says 'Incorrect function', and every fix I look up for it doesn't work. I'm not sure if this is like a permanent issue, if its the SATA cable, or if its the port I'm plugging it into, but all of those things I can't check. My motherboard only has SATA ports at the bottom, which is where my thick-ass GPU sits. So only one port can be accessed by the cable I have.

If there's any non-hardware related fixes that I could try, please let me know. Otherwise, I'm going to try and get my hands on one of those 90-degree hook cables.

Answer 1

Hi wallwraf,

Since the drive was working previously and now appears as Unknown / Not Initialized while returning an"Incorrect function" error during initialization, this may indicate that Windows can still detect the storage device but is having difficulty communicating with it properly.

As a quick check, you could verify whether the drive is being reported correctly by the system:

1, Open Command Prompt as Administrator.

2, Run:

diskpart
list disk

3, Check whether the affected disk shows its expected capacity or if it appears as 0 B.

You can also check Device Manager > Disk drives and see whether the drive model is listed correctly. If the model name is missing, generic, or appears with an error, that can help narrow down whether the issue is related to communication with the drive itself.

If the disk reports 0 B capacity or is not identified correctly, software-based recovery options become limited, and further testing with a different SATA cable, power connection, adapter, or another system may help determine whether the issue is related to the drive or its connection.

I understand it can be frustrating to lose access to a drive that was working previously. Hopefully these checks provide a bit more insight into where the problem originates and help determine the next best step.

Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

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Answer 2

Disk 0 - Unknown, Not Initialized with Incorrect function usually points to one of these states:

1. The disk is Offline in Disk Management.
   • Open Disk Management as administrator: search Computer Management > Run as administrator > Storage > Disk Management.
   • If the disk shows Offline, right-click it and select Online.
   • If it comes online, try initializing it again.
2. The disk is visible but has a healthy partition and just lacks a drive letter.
   • If Disk Management shows the disk Online and a partition is Healthy, but it does not appear in File Explorer, add a drive letter.
3. There is a device or driver problem.
   • Open Device Manager.
   • Check for any storage-related device with an exclamation mark or other error.
   • Right-click the problematic device, select Uninstall device, then select Action > Scan for hardware changes.
4. The disk is failing.
   • A common reason a disk cannot be initialized is that the disk is failing.
   • If possible, test the disk on another PC. If it also fails there, that strongly indicates the disk itself is the problem rather than Windows.

If the disk is actually new or fully disposable and does not contain anything important, the supported initialization path is:

• Open Disk Management as administrator.
• If the disk is Offline, set it Online.
• Right-click the disk > Initialize Disk.
• In the dialog, confirm the correct disk and select the partition style. The default is GPT.
• After it becomes Online, right-click the Unallocated space > New Simple Volume.

For a multi-terabyte data disk, Windows guidance is to initialize it using GPT. Note that changing partitioning or reinitializing can erase existing data, so only do that if the disk is truly expendable.

Given the constraints around the SATA port, the main non-hardware checks available are:

• Verify whether the disk is Offline and bring it Online.
• Check whether it is already Healthy but missing a drive letter.
• Reinstall the device from Device Manager and rescan for hardware changes.

If those steps do not change the behavior, the remaining likely causes are hardware-related: the disk itself, the cable, the controller, or the port.

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References:

• Troubleshoot Disk Management
• Initialize new disks
• Windows support for hard disks that are larger than 2 TB