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I had a RAID 1 mirrored array composed of 2 x 500GB HDDs connected to my Gigabyte Z590 motherboard.

I was running out of space, so I cloned one of the drives with Clonezilla to a 1TB drive.

On that new drive, I created partitions and extended the data partition to include the unassigned 500GB.

I could boot to my OS, so I went ahead and cloned that 1TB drive to another 1TB drive and attempted to recreate the RAID 1 array with those drives.

Problem was that my 1TB drives were emptied by the BIOS, so I want to know how to recreate my RAID 1 array.

In my BIOS, I did the following when trying to recreate the RAID:

  • Settings → I/O ports → Sata and RST configuration → Sata mode selection = Intel RST Premium With Intel Optane System Acceleration

  • Settings → Intel (r) rapid storage technology → Create RAID volume → Raid level 1 (mirror) → I selected both 1 TB drives → Create

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    You cloned the clone of a single disk in a mirror RAID? Why? You should have clone 1:1 then expanded the storage of the entire RAID
    – Ramhound
    Commented Mar 10, 2023 at 5:55
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    Typically you can take a single HDD with data, and another HDD that is unformatted and create a RAID 1 array. The RAID controller will create the mirror for you.
    – Blindspots
    Commented Mar 10, 2023 at 8:57

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