ST2000DL003 Compatibility?

If you removed all the old disk at once yes. Otherwise you'd need to factory default with the old disks in place wait for the resync to complete then test again.

Again, many thanks. I did remove both 1TB disks at the same time and put in 1 x 2TB on and did the factory reset.
I counted to 30 or so while holding the paperclip in. I was watching the blue light as opposed to the HDD light so was wondering why I wasn't getting the 2 sets of flashes. :oops:
I assume though that because it asked me about the new raid setup that I did wait long enough?
Also, what is the difference between that reset and the factory reset offered within Raidiator?

You probably waited long enough. In any case doing the factory reset was probably unnecessary if the disk was new and hadn't been used before, but it wouldn't have hurt.

Comparing two disks in the NAS versus one isn't a fair comparison in my view. You also need to consider the performance differences between your new and old disks.

mdgm wrote:
In any case doing the factory reset was probably unnecessary if the disk was new and hadn't been used before, but it wouldn't have hurt.

?? I thought it was recommended to get the 4k working properly within the NAS? As opposed to relying on the Seagate 'smartalign'? If it wasn't necessary then I could have achieved all of this by just hot-swapping the drives with no downtime?

mdgm wrote:
Comparing two disks in the NAS versus one isn't a fair comparison in my view. You also need to consider the performance differences between your new and old disks.

The drives were Seagate 7200 drives. Do you think the newer 5900 ones will be slower then?

sjw wrote:
I thought it was recommended to get the 4k working properly within the NAS? As opposed to relying on the Seagate 'smartalign'? If it wasn't necessary then I could have achieved all of this by just hot-swapping the drives with no downtime?

Oops. What I should have said is that if the NAS only contains new disks the NAS automatically does the factory reset for you without you needing to manually initiate. Yes for 4k sector alignment you need to do the factory default on 4.1.7

sjw wrote:
mdgm wrote: Comparing two disks in the NAS versus one isn't a fair comparison in my view. You also need to consider the performance differences between your new and old disks. The drives were Seagate 7200 drives. Do you think the newer 5900 ones will be slower then?

I'm not sure. If there is a performance difference it hopefully shouldn't be too big (if comparing two redundant volumes with the same number of disks). Disk speed is a factor in performance.

Phew.
Now I have done the reset, what if I was to put one of the old drives back in and boot up. Then hot add the 2TB drive and let it sync - and then add the other?

Doing that wouldn't give you 4k sector alignment. A factory default on 4.1.7 is needed to get 4k sector alignment. The alignment is done on the partitions of the disks themselves. Going back to your old disks would go back to 512-byte alignment.

Thanks. :) What would happen if I were to remove the new 4k drive and put the original 1TB drives back in - to do some speed comparison? And then is it fine to take them out and put the newer 2TB one back in?
It wasn't nice copying the data back to the NAS and having Windows tell you the copy time will be 'About a day'...

Added the second HDD last week..
Just switched on and was greeted by a message to check the logs.. They told me that "Volume scan found and corrected errors."
However, on the front screen I am told:
Volume C: Online, RAID Level , disks, 0% of 0 MB used :shock:
Looking at the volume settings I am told:
Ch 1 : Seagate ST2000DL003-9VT166 [1862 GB] 0 MB free
Ch 2 : Seagate ST2000DL003-9VT166 [1862 GB] 1860 GB free
SMART+ is not reporting any errors.

I have done a reboot with both the 'Perform volume scan on next boot' and 'Check and fix quotas on next boot' options ticked. It is still the same afterwards... :(

Any idea what' going on?

btw, the data does seem to be available - and is correctly reported by a mapped drive from the PC.

Please contact tech support. If over 90 days since purchase of your ReadyNAS use an Online Submission. Post your case number.