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Changing DISKID

Created: 02 Jun 2012 • Updated: 02 Jun 2012 • 7 comments
pkh's picture
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I want to put this work-around in a blog so that it does not get "lost" after some time in the midst of the other discussions.  This workaround is provided by IT downunder in this discussion

https://www-secure.symantec.com/connect/forums/sata-drives-usb-dock-be2012-whats-best-method-setup#comment-7068281

BE recognises each disks by their unique diskids.  Under some circumstances, two disk can have the same disk ids.  This will present a problem when they are used for B2D folders.  Below is how to fix this problem

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All our external USB SATA backup drives are recognized as normal Disk storage and I managed to add most of these to Backup Exec 2012 and put them in a Device Pool. Some disks from the same manufacturer batch were recognized as the same disk in BE Storage (e.g. disk 10 and 11 both showed up as disk 10) and I was not able to add a new disk device.

Then I thought what does maybe distinguise one disk from the other, the Disk Signature ID in sector 0. This is where Mark Russinovich, our SysInternals guru came to the rescue, because I found this article:http://blogs.technet.com/b/markrussinovich/archive/2011/11/08/3463572.aspx.

Work-around:

  1. Attach first disk to your server and use DISKPART to find the signature
    SELECT DISK #, where # is the disk number in you system (use Disk Management to find disk number).
    UNIQUEID DISK
    This will give you a 4 byte disk ID e.g. "e9eb3aa5"
  2. Now attach the second (or third, etc) and do the same, find the UNIQUE ID, which will show as the same ID as the first. With the same DISKPART tool you can overwrite the ID with a new ID, try incrementing the number with 1 (that is what I did) for each new disk.
    Use the command in DISKPART: UNIQUEID DISK ID=e9eb3aa6, where the ID is the id you choose, this is just an example (see also the article above).
  3. After the ID is changed, I deleted all BE folders from that disk (/BEControl and /BEdata), disconnect the USB drive and reconnected it.
  4. This time BE Storage does not find the disk in the list and you can Add a new disk.

Comments 7 CommentsJump to latest comment

NickE03's picture

What happens if you have different DISK ID's and it still picks up that the disks are one and the same

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IN4NI's picture

I have that issue,  All USB drive have different Id's however BE still thinks that 3 are the same

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NickE03's picture

Managed to fix it by doing a complete format on the hard drives now picks up both.

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NickE03's picture

Managed to fix it by doing a complete format on the hard drives now picks up both.

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lmosla's picture

Sounds like an awesome possibility but testing and documentation should be applied before implementing this as a workaround.  There is a need to gather further details as Colin Weaver mentions in his post in the referenced link  https://www-secure.symantec.com/connect/forums/sata-drives-usb-dock-be2012-whats-best-method-setup#comment-7068281

It would be interesting to find out how media settings react to these drives.

I'll be keeping track of how this develops

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Colin Weaver's picture

Just for info - if looks like DISKPART in Windows 2003 does not have the ability to overwrite the Disk ID with a new one as such the ifno form pkh is for Windows 2008 and later

For 2003 there appear to be various 3rd party utilities that might be able to achieve the same result, however Symantec will not be able to officially recommend one and therefore any use of such tools will be at your own risk.

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MaryP82's picture

I have this issue with two of my WD My Book 3 TB drives.  They had the same Disk ID and I followed the steps listed here to change the Disk ID, but keep having the same issue.

If I move the /BEControl and /BEdata disk to another hard drive, will I be able to move the contents back, after formatting and/or reconnecting the drive, and have the BE database see them?  If not, any suggestions?  These are for my monthly backups and I really don't want to lose them.

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