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"Add Mirror" greyed out when replacing a failed Raid1

I am trying to replace a failed disk in a raid 1 under windows 7 pro. I had to physically remove the disk before the machine would boot up properly. I then went to disk management and removed the failed mirror. I then installed the new disk, initialized it as a MBR disk and converted it to Dynamic.  I set up a partition of the same size as the original disk, but when I right click the original disk, "Add Mirror" is greyed out. If I delete the partition "Add Mirror" becomes available but when I try to add the  unallotted space to the mirror, I get an error message that the disks have to have the same partition size and sector size and type.  What am I doing wrong. Thanks for any and all help.
RAIDWindows OSWindows 7Storage

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joinaunion
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Jonathan Kaplan
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The article was not of any help in solving the issue. When I leave the new drive unallotted and try to add the mirror from the original drive, I get a message "All drives holding an extent of the volume must have the same sector size and the sector size must be valid."  If one drive is not formatted, it has no sectors, right? So what does this all mean?
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joinaunion
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Did you set the partitions as active?
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Jonathan Kaplan
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ASKER

I can not do that since you can only mark active a partition and if I put a partition on the new disk, "add a Mirror" will be greyed out. It is only available with I'm trying to add a disk without a partition.
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Member_2_231077

Probably one is 512b and the other 4K sector size. Need disk model numbers to confirm.
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Isn't sector size a function of formatting? If so, an unformatted drive should accept whatever sector size is chosen or dictated by the original drive. Right?
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Thanks to you both. I guess I just have the wrong SSD installed. It just might be simpler to match the model number of new drive with old and get another HDD.
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Member_2_231077

If you post the model numbers you have we can confirm, you can get that from device manager.
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Jonathan Kaplan
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Drive 1= ST500DM002-1BD142
Drive 2-WDS500G2B0A-00SM50

Google shows the sector size for both at 512 bytes
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Member_2_231077

One is a SSD and the other a HDD!
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Jonathan Kaplan
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Ideally that shouldn't matter, no?
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Member_2_231077

Mirroring two different technologies isn't trivial and mirroring a SSD to a HDD makes no sense so is unlikely to be implemented any day soon.
Windows OS
Windows OS

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

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