1.    09 May 2017 #1
    Join Date : May 2017
    Posts : 2
    Windows 10

    Breaking disk mirror, which disk will keep the original drive letter?

    If I select "break mirror" on a mirrored disk in disk manager, will that disk get a new drive letter assigned, or will it keep the original drive letter?
    (I want disk#1 to keep the original "D:" as drive letter, and assign a new drive letter to disk#2, e.g. "E:").
      My ComputerSystem Spec
  2.    09 May 2017 #2
    Join Date : Jun 2016
    Los Angeles
    Posts : 1,050
    Windows 10 Pro

    If you are talking about a a RAID 1 Mirror, then the original drive will keep it's Drive letter. and keep the data. The data on the mirrored drive will be lost and have no drive letter.
    Anytime you want to change a Drive letter, go to Start/Search and type diskmgmt.msc, Right click the diskmgmt results and Run As Administrator. In the lower pane, Right click the drive you want to change the drive letter of and choose Change Drive Letter or Paths. Choose a drive letter not being used.
      My ComputerSystem Spec
  3.    09 May 2017 #3
    Join Date : May 2017
    Posts : 2
    Windows 10
    Thread Starter

    It is Windows disk mirroring (in software) on 2 dynamic disks. Not sure if that is the same as RAID1...

    You mean it doesn't matter which disk I select for "break mirror", will disk#1 still keep the drive letter "D:" and disk#2 get a new drive letter assigned?

    I came to the conlusion that disk#1 is the original and disk#2 is the mirror, because when Windows recently made a resync after a powerfail (which took a staggering 11 days to complete = not acceptable!) it copied everything from disk#1 to disk#2 (checked that in the task manager).
    So my goal here is to make sure that drive#1 will end up as "D:" when I break the mirror, because that is the disk I will continue to use, and it seems safer to go with the original than the mirror (especially after that resync issue...)
      My ComputerSystem Spec
  4.    09 May 2017 #4
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,466
    windows 10

    You can reasign the drive letter at any time so no problem
      My ComputerSystem Spec


Similar Threads
Thread Forum
Storage spaces retired disk in mirror - drive seems ok
Hi all - have set up a mirror configuration in storage spaces of 2 4TB drives. I have got a waning that there is a problem and in the storage spaces GUI it shows as one drive been retired (a seagate ST4000DM000) and need replacing. I run a short...
Drivers and Hardware
Solved Unable to convert 7 partition disk (basic) to dynamic disk
I am running Windows 10 Pro. I have an old 1Tb drive that used to be the boot (C) drive and also had partitions for two additional drives. I since replaced that 1Tb drive with an SSD and another 2Tb second internal drive. I've inserted the...
Drivers and Hardware
Partition Change created a Dynamic Disk from a Basic Disk
- Good morning Folks! :) I thought this would be simple: 1TB HDD with Two 500GB Partitions E: & Z:. Having available space in E: and needing more in Z: I performed a "Shrink" on E: of 75GB then "Expanded" Z: to the full amount available. I was...
Drivers and Hardware
A drive takes up a letter, doesn't appear in disk management
Hello After reinstalling win10 i noticed that i have a drive that takes up a letter and it doesn't appear in disk management, so i can't change it's letter to something like Z: and hide it. It's nothing major but I'd just like F: to be the letter...
Drivers and Hardware
Solved How to change drive letter of mirror drive
I have just set up a mirror drive(software RAID1) and want to change the drive letter. I am getting a message "The parameter is incorrect". I am wondering if I am stuck with the one assigned when the mirror drive was set up.
Drivers and Hardware
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 00:49.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App

Windows 10 Forums