After Update on Windows 10 I can no longer access a hard drive partition

[MrAffinitys]

I have got a 3TB hard drive that I have used for a while now, and when I first used it I could only access 2TB. I read that this was because my drive was MBR and not GPT but I could not have windows installed on a GBT disk. So I used Seagate Disk Wizard to extend the drive, I assume by making a partition so I could then have the full 3TB.

However there was a major update for Windows 10 out in November I believe which I have only just installed. This has gotten rid of my partition and I am locked out of using the extra 1TB. When I go through the steps I used before with Seagate disk manager, I get an error. For anyone that may be able to make sense of this error here is the error codes etc..

An error occurred while working with Extended Capacity disk driver. (0x1800009)
Tag = 0x62BCB8011D1B46B6
{0} (0x17F000F)
Tag = 0x7ABC87484B91F3EF
A device attached to the system is not functioning (0xFFF0)
code = 8007001F)
Tag = 0xBD28FDBD64EDB8C3

I have now got an SSD which has windows installed on it and am able to convert this drive to GPT, however this requires me to format my hard drive as far as I am aware. I am okay to do this but I really need to back the files up from the partition which I have no access too.

So is there anyway I can fix this so I can get access to them files so I can back them up?

Thank you in advance.

 

[Szaki]

Are you able to see that extra partition without a drive letter in Disk Manager ? Las time I had an issue like yours i just had to allocate a new letter next to it. But I'm not sure whether my data got lost or not, so be cautious.

 

[MrAffinitys]

Are you able to see that extra partition without a drive letter in Disk Manager ? Las time I had an issue like yours i just had to allocate a new letter next to it. But I'm not sure whether my data got lost or not, so be cautious.

I can see it as unallocated, but I cant do anything with it as far as I am aware.

 

[mbarnes86]

Hi

Is this a 3TB partition or 2TB + 1TB ?
Is this a 32 or 64 bit windows 10?

If boot windows disk is under 2TB you dont need gpt partitioning

Where did ssd with windows 10 come from, if not a fresh install on your system or one with a similar motherboard you are likely to have problems

Not sure about seagate disk manager problem you should ask seagate technical support if a new device driver is available

If valuable data on this 3TB disk get professional help

Best of luck

Regards
Mike Barnes

 

[MrAffinitys]

Hi

Is this a 3TB partition or 2TB + 1TB ?
Is this a 32 or 64 bit windows 10?

If boot windows disk is under 2TB you dont need gpt partitioning

Where did ssd with windows 10 come from, if not a fresh install on your system or one with a similar motherboard you are likely to have problems

Not sure about seagate disk manager problem you should ask seagate technical support if a new device driver is available

If valuable data on this 3TB disk get professional help

Best of luck

Regards
Mike Barnes

This is a 3TB hard drive. I could only see 1.99TB when i viewed from windows file explorer. I downloaded a tool from Seagate which then allowed me to "unlock" the extra space and I would see it as an extra hdd in the file explorer. After a Windows update, I can no longer see this drive.

The SSD is something I purchased later and that is now the boot disk.

Thank you for your help.

 

[Szaki]

Are you able to see that extra partition without a drive letter in Disk Manager ? Las time I had an issue like yours i just had to allocate a new letter next to it. But I'm not sure whether my data got lost or not, so be cautious.

I can see it as unallocated, but I cant do anything with it as far as I am aware.

Right click on it > Change drive letter and Path - isn't this option available ?

 

[JaredDM]

Let me guess, the model is ST3000DM001 right? If so there's about a 39% chance the drive has just failed (that's the percentage of them that fail annually under intensive useage).

Most likely the drive is stuck in a pending auto-reallocation firmware glitch which can only be recovered using professional data recovery tools like PC-3000. If the data isn't critical, just RMA or scrap it. If you need the data, then it's time to seek out a professional.

 

[drtweak]

To check if it is bad download crystal disk info from my signature. If it says anything but good post back results.

If it is all good then yea something isn't working right here.

You don't make it quiet clear why you had to use the seagate tools? Was this a boot drive before or no?

 

[MrAffinitys]

To check if it is bad download crystal disk info from my signature. If it says anything but good post back results.

If it is all good then yea something isn't working right here.

You don't make it quiet clear why you had to use the seagate tools? Was this a boot drive before or no?

It use to be a boot drive, but I then got an SSD. I never bothered to change it from MBR because I am an idiot and it was never really anything I thought about until now.

I know my files are still there because they are movies and tv shows. My plex server still picks them up but I cannot access them.

 

[MrAffinitys]

Are you able to see that extra partition without a drive letter in Disk Manager ? Las time I had an issue like yours i just had to allocate a new letter next to it. But I'm not sure whether my data got lost or not, so be cautious.

I can see it as unallocated, but I cant do anything with it as far as I am aware.

Right click on it > Change drive letter and Path - isn't this option available ?

This option is not available and everything is grayed out, except from properties.