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Forum Discussion
Readynas 104 mirroring
I've had my Readynas104 for a little while now and have been using a 5TB WD NAS HDD as my primary drive with a 4 TB one sitting as a spare. I've been for the longest time meaning to setup mirroring s...
kkothamasu wrote:
can I buy the cheaper 6 TB drive and mirror the contents of the 5 TB drive knowing that I'll be giving up 1 TB on the 6 TB one?
Yes
kkothamasu wrote:
If so, how do I set this all up without erasing the contents of the primary drive?
Check that XRAID is enabled on the volume page of the web-ui. It's enabled if there is a green stripe on the XRAID control. If it's disabled, just click on the control.
After that you just hot-insert the new disk (unformatted) into the NAS. It will automatically switch your volume from JBOD to RAID-1 and begin mirroring the existing disk. Performance will be sluggish until that completes.
kkothamasu wrote:
I've been for the longest time meaning to setup mirroring so that I have a backup of everything on my primary drive
This is a good idea, but it's not the same as a true backup. RAID is not enough to keep your data safe - there are quite a few failure modes where you can lose all your data. If you aren't backing up the NAS to a different device, then I recommend also putting a backup plan in place (for instance backing up the data to a USB drive).
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