Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: How do I break failed software RAID1(mirror) in Windows 7?

01 May 2012   #1

Windows 7 Professional x64
How do I break failed software RAID1(mirror) in Windows 7?

I want to break a software RAID1(mirror) in Windows 7, without losing the data on any of the two HDDs.

One of them has developed some weak sectors and I want to compare the data on both of them.

As you can see in the attached image, it says Errors under Disk1, and Online under Disk2. The problem is that according to SMART, Disk1 is healthy, and Disk2 contains some weak sectors(Pending Sectors).

My question is, how do I break the array, in order to be able to see the second drive as a different partition in Windows 7, without losing the data that is written on it?

Attached Thumbnails
How do I break failed software RAID1(mirror) in Windows 7?-capture1.png  
My System SpecsSystem Spec
01 May 2012   #2

Windows 7 Ultimate x64 SP1

I'm not sure if you can or not. If you know one of the drives is okay, why not just copy or back up your data from that drive? Then you an format and test both drives to be sure of their condition.
My System SpecsSystem Spec
01 May 2012   #3

Windows 7 Professional x64

because it's an odd situation. Disk2 was the slave one, and Disk1 was the master.
Now Disk1 has that error status and Disk2 the online status, even though Disk2 caused the failed redundancy issue, due to those weak sectors.

I want to be sure that at least one of the HDDs has the whole data.
My System SpecsSystem Spec

01 May 2012   #4


This is why RAID is not optimal except for users needing huge storage for editing video files, etc.

It is not even redundant since if you lose one HD you lose both.

The second HD could instead be used as backup for a Win7 System image: Backup Complete Computer - Create an Image Backup

You can browse in to see if any data is visible to copy it out externally: Copy & Paste - in Windows Recovery Console or using Paragon rescue disk recover data
My System SpecsSystem Spec
01 May 2012   #5
Microsoft MVP

Windows 7 Ultimate 32bit SP1

Go into BIOS > advanced > peripheral config > secondarary Sata controller > disable.
My System SpecsSystem Spec
01 May 2012   #6

Windows 7 Professional x64

but I want to see them both, but as different partitions.

I have this option called "remove mirror". Does it remove the partition also?
My System SpecsSystem Spec
05 May 2012   #7

Windows 7 Professional x64

I've found the answer.

I had to:
- put offline the mirror disk
- remove the mirror(without putting the mirror disk offline, this option is disabled)
- put the disk online again and import it as foreign disk

This way guarantees that you won't lose the data from the mirror.
My System SpecsSystem Spec
05 May 2012   #8


Thanks for reporting back.
My System SpecsSystem Spec

 How do I break failed software RAID1(mirror) in Windows 7?

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
Troubleshooting RAID1(mirror) problem after windows 7 failure to start
Hi there, So I'm not super technically inclined, so please bear with me as I try to describe my issue. I have a Dell Inspiron 546 with Windows 7 Home Premium 32 bit The problems started a couple weeks ago. I had it set to be in sleep mode, and typically when I sit down to the computer I...
General Discussion
Using Win 7 Software RAID1 (Mirror) With Laptop
I have decided that I would like to mirror my laptop hard drive to a USB 3.0 external disk. I have read how to set it up, so no issues there. 90 percent of the time, my laptop sits in a docking station to which the external drive is attached, so there will be no issues with immediate mirroring...
General Discussion
W7 RAID1 Mirror - HDD constantly in use
Hi all I'm running a software RAID 1 set up on a couple of WD Green HDD. It's been performing well for the last year or so. Over the last week or so the hard drives have started running pretty much flat out. Annoyingly there's nothing in Resource Monitor to show what's causing this, and the...
Hardware & Devices
What is the best software to use for creating a daily mirror?
OK so I've created an image of my Windows setup using Macrium Reflect (free version) but now I'm looking for a program that will automatically create a backup of my projects drive at the end of every day (to an external USB 3.0 drive). I would like for this to be done automatically and every day...
Backup and Restore
Could Windows 7 software RAID1 slow down PC's response?
Hi, I have a Q9450 CPU, 8GB RAM, 6 HDDs and Win7 x64. A few days ago I've mirrored one of the storage HDDs, a 2TB Samsung, using Windows 7 Storage Manager, using an identical 2TB Samsung. Everything seems OK, the matrix is healthy, etc. But, it feels like the system isn't as snappy as...
General Discussion
Software (WinXP) raid1 on Windows 7?
Hi, it's possible to use raid1 builded on Windows XP SP2 32-bit (SW raid1 manually enabled in Windows XP by re-writed this files: dmadmin.exe, dmboot.sys, dmconfig.dll) in Windows 7 RTM 64-bit? So if Win7 can support raid1 natively like Windows Server 2003 :) I mean use without rebuilding raid1...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 21:18.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App