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Understanding Drive-swapping
So I've recently upgraded all of the drives in my ReadyNAS Business. I did it by shutting down my ReadyNAS and pulling ALL of the drives out. Then pushing 6 new drives into it and turning it back on. The ReadyNAS booted up as "clean" and needed me to re-initialize it using RAIDar.
I've not touched the old drives. They're clearly labeled.
Well, it turns out I forgot a few files on the old drives. Is it safe for me to do the same thing: shut down, pull all the drives, insert all the old drives, and start back up again? Will it redetect the old array and bring everything online and let me read the old volume? When I do the same thing again, will my current volumes show up reliably? I'm not sure how much volume configuration is stored on the drives themselves and how much on the internal memory.
If you upgraded firmware after you swapped out, then the NAS will upgrade the firmware when you boot up on the old disks. That is, it will check the firmware on the OS partition, and if it differs from what is in the flash it will upgrade (or downgrade).
But all the settings, etc are stored on the drives. So you can swap back (being careful to power down, swap disks, power up).
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If you upgraded firmware after you swapped out, then the NAS will upgrade the firmware when you boot up on the old disks. That is, it will check the firmware on the OS partition, and if it differs from what is in the flash it will upgrade (or downgrade).
But all the settings, etc are stored on the drives. So you can swap back (being careful to power down, swap disks, power up).
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