HDD was in raid1, now not working

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Nathan K

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Jul 29, 2015
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Had two old laptop hard drives floating around so I put them in my desktop in raid 1 for a while. Then needed one to replace a failed drive in a laptop, tried to turn off the raid so I could continue to use the other on its own - except it won't work for some reason. My computer still sees it as the capacity of both drives and simply shows as "bad disk". I've even tried taking it out of my desktop and formatting it in another computer then putting it back in my desktop, still same issue.

IDK what I did wrong, any help please?
 
Solution
drtweak
Put it back into RAID mode. Just removing one of the disk is all you need to do. When you start up the PC will just say the RAID is degraged. By changing it from RAID to AHCI you changed how it boots and it won't boot. Just toss everything back to how it was in RAID mode and it should boot up.
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Nathan K

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Jul 29, 2015
25
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Yes, I've even tried other SATA ports on my motherboard. It seems to be linked to the drive itself, not the port, but as I said the drive works as normal in other computers. For some reason, *this* computer sees *that* hard drive as still part of a raid even after formatting. I'm so lost.
 
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drtweak

drtweak

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Sep 17, 2012
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Put it back into RAID mode. Just removing one of the disk is all you need to do. When you start up the PC will just say the RAID is degraged. By changing it from RAID to AHCI you changed how it boots and it won't boot. Just toss everything back to how it was in RAID mode and it should boot up.
 
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Solution
N

Nathan K

Reputable
Jul 29, 2015
25
0
4,540


Thank you! I thought turning RAID mode off would reset the drives to non-RAID. Evidently not so... I changed the mode back to RAID, obviously with 1 of the disks missing it failed and opened the configuration where I was able to delete the RAID. I then went back into the BIOS and changed back to AHCI mode and voila! Back to just an ordinary hard disk for me to use
 
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drtweak

drtweak

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Sep 17, 2012
6,342
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38,640
Yea same here unless it was the RAID controller that was still picking it up as a RAID drive. Sometimes though if all you do is format it will still pick it up. you have to delete all the partitions to erase all the RAID info so the RAID picks it up as a foreign drive.
 
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