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The driver detected a controller error on \Device\Harddisk1\DR3.

In Windows 10 64-bit, I went to Event Viewer saw this error:

The driver detected a controller error on \Device\Harddisk1\DR3

I looked in Computer Management > Disk Management, but not sure which drive the error message refers to.

I would run a chkdsk /r on all the drives, but this 5TB drive would take over 3 days to complete a chkdsk /r. If indeed this external caused the error message, I want to make sure.

enter image description here

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Sun
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  • It clearly says which disk it is. \Device\Harddisk **1** \DR3, so it is referring to Disk 1. – LPChip May 29 '16 at 14:40
  • What is dr3 for then? So it is my 931GB drive? – Sun May 29 '16 at 14:44
  • Its somekind of identification to which partition it is referring. And yes, it appears to be your 931GB drive. A controller error is not like bad sectors though. Chkdsk may make the drive become permanently unavailable. you should take this warning and start doing backups. – LPChip May 29 '16 at 14:59
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    Possible duplicate of [Which drive is \Device\Harddisk1\DR1?](http://superuser.com/questions/538574/which-drive-is-device-harddisk1-dr1) – DavidPostill May 29 '16 at 17:17
  • Does this answer your question? [How do I determine which HD is involved in the Event Viewer?](https://superuser.com/questions/357891/how-do-i-determine-which-hd-is-involved-in-the-event-viewer) – Joep van Steen Jul 17 '23 at 07:41

2 Answers2

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Yes, it's the disk number as displayed in Disk Management. Alternatively, there are many ways to check it on command line.

  • PowerShell:

    Get-PhysicalDisk | Select DeviceId, Model, SerialNumber

    "list disk" | diskpart

  • cmd.exe:

    echo list disk | diskpart

  • any command interpreter:

    wmic diskdrive get Index, DeviceId, Model, SerialNumber

Commands using diskpart need to be run in a terminal launched as Administrator.

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It clearly says which disk it is. \Device\Harddisk 1 \DR3, so it is referring to Disk 1.

The DR3 part at the end is some kind of identifaction to which partition it is referring.

Do note, a controller error is not like bad sectors though. Chkdsk may make the drive become permanently unavailable. You should take this warning and start doing backups.

LPChip
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    `DR` part has nothing to do with partitions. Basically, it is the disk reconnection counter – https://superuser.com/a/1268208 – ﾤ ﾡ Jun 15 '23 at 14:35