I've cloned a data drive using a StarTech disk duplicator, and now would like to view both drives simultaneously in Windows.
Disk Management throws up a "Offline (The disk is offline because it has a signature collision with another disk that is online)" error.
I'm wary to simply click "Online" on that disk as it's unclear to me what that does - could it cause problems?
Instead I did some googling and found many references to this problem, with everyone suggesting this sequence of events:
- run diskpart
- select disk x
- uniqueid disk ID=#NEWID#
I created a new ID by adding 1 to each segment, so 4FEEE371-7836-4E05-9C1A-CB7A1199A3BD became 4FEEE372-7837-4E06-9C1B-CB7A1199A3BE. (At first I tried just changing the very last digit but that didn't seem to be good enough).
I feel by changing each segment Windows must surely now see that as a new uniqueid, but I still get the same error message, even after removing/reconnecting the drive and after a reboot.
Is there something else I should be changing as well as the uniqueid?
Thanks
11 Answer
You don't have to be afraid of clicking "Online" on that disk.
This will force Disk Management to generate a new disk signature for the offline
disk, which is much safer than using diskpart and more effective.
Your data should not be affected.
