Replacing failing disk

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kobari wrote:

 

I have a raid-1 one setup (2 disks: 5 and 6), and was wondering if I can replace it a similar but not the exact same drive, e.g. if I buy a 3TB disk, would it work or would I need to find the exact same drive?

 

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The replacement doesn't need to be the exact same drive.  A 3 TB Ironwolf or a 3 TB WD Red Plus would both work.

However, don't get a desktop class drive (like a Barracuda) or the WD Red model.  The Red drive is SMR (as are most 3 TB desktop class drives).  SMR drives don't work well with ReadyNAS,  you want a CMR drive.

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kobari wrote:

Also, where can I find the steps for doing this? Is a simple operation like plugging out the old one and putting in the new one is enough?

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I recommend hot-swapping (removing the old disk, and inserting the new drive with the NAS running).  It is best practice to update your backup before doing this.