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Windows 7: Disk offline -- Sig collision with another disk

03 Apr 2013   #11

Windows 7 Home Premium 64bit

Quote   Quote: Originally Posted by SledgeDG View Post
Hey jimbo, do those drives have external power supply or are they drawing their power through the usb bus ?
If so you might need a split cable to connect to multiple ports the same time to overcome the 500mA at 5V limit.

In case it's not a power issue you could try this solution (which I found on the net):

1. Open Command Prompt.
2. type DISKPART - a new window will open.
3. enter command : LIST DISK. This will show you all the connected disk with the offline one.
4. Now select the offline disk using the next command SELECT DISK <disk_no> wheredisk_no is the offline disk number which you can get from step 3 result.
5. Now you have selected the offline disk. Now enter command ONLINE DISK.

Folks may find this link useful too: Laurent Kempé | Windows 7, Disk is offline because it has a signature collision

My System SpecsSystem Spec
04 Jul 2013   #12

Windows 7 Professional 64bit
WD Drives

I just bought 3 2TB Western Digital Passport drives and all three have the exact same Disk ID. I guess that WD didnt think that anyone would ever want to buy a second drive from them. Now thats what I call confidence in your product!

That is not totally unfounded. A few years ago, i bought 8 10K Raptor drives from them. Four were dead on arrival and were replaced, of those, 6 died within 4 months, and the other 2 were dead within a year. I didnt bother replacing them because I didnt want to ever touch a WD drive again. I swore that I would never buy another drive from them, and have been with Seagate ever since. Unfortunately Seagate is not producing high capacity portable drives anymore. They even discontinued their 1.5TB portable. Since Seagate bought WD, I guess that they are leaving the portables up to WD. We will see how these Passports turn out.
My System SpecsSystem Spec
19 Nov 2015   #13

Windows 7 Ultimate x64

A simple solution. Go to disk management. Find your external HDD in list. Go to the smallest box on left hand side where your external HDD is highlighted. Right click and select 'on line' . Done
My System SpecsSystem Spec


 Disk offline -- Sig collision with another disk

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