Problems with ReadyNAS

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GaryDD wrote:

Even with the 3Tb drive removed, still shows the 2Tb drive as 'dead' - wtf?

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There are at least 2 possibilities. 

One is that the sata port in the NAS itself failed, so it is not detecting any removals insertions.

Another is that the linux disk driver disabled the port when the old hard drive failed (if the drive were seriously misbehaving).  Rebooting should fix that - if you already tried rebooting, perhaps try shutting down, removing the main power cord for a couple of minutes, and then power up with the bay empty.

A NAS is not a backup solution.  Hopefully you have a real backup.  With only 2 drives, you should be in RAID 1.  Which means everything is copied to the second HDD.  So you should be OK and all your Data should be safe on that 1 HDD.   You can only replace one HDD at a time,   The NAS has the rebuild the system, when in your case would be format and copy everything over from the other HDD to the new HDD.  If you replace the 2GB HDD with a 3GB HDD, it will only show up as 2GB.  Think about it.  You can't fill a 3GB drive and expect it backed up onto a smaller 2GB HDD.  So it'll be 2GB until at such time as you replace the other 2GB HDD with a 3GB HDD and then it'll show as 3GB.  

I would turn off the NAS, pull out the 1 bad HDD, leave the bay empty, turn it back on and boot up.  You should be able to access all your Data.  At this point, I would back up that Data to some other external HDD.  Once backup up, Pop in the new HDD.  As long as it's not formated, the NAS should see it and then install it and start the rebuilding process.  If that doesn't happen, well you have a backup of all your Data. The best bet is to restart the NAS from scratch.  Reformat both HDD in the NAS. As in start fresh, when done.  Copy all the data you backed up back onto the NAS.