Max capacity on RNDU4000 or RNDP400U with 3TB

NetGear hasn't updated the specs pages to reflect what can now be achieved with 3TB drives. So with 4x3TB you'd get about 8.1TiB. See the X-RAID Volume Size Calculator link in my sig.

mdgm wrote:
NetGear hasn't updated the specs pages to reflect what can now be achieved with 3TB drives. So with 4x3TB you'd get about 8.1TiB. See the X-RAID Volume Size Calculator link in my sig.

8.1 TiB being around 9 TB (TiB is the units the NAS uses, 1024*1024*1024*1024 bytes; TB is what the drive manufacturers use, and is 1000*1000*1000*1000 bytes).

Great, thanks for that! Should all RNDU4000's out there have the right firmware revision to support 3TB? I've found a super cheap one at a Melbourne retailer that is $399... which is about $150 cheaper than others around. Just wanted to make sure there wasn't some revision number of models that I'm not aware of that will catch me out and require hours of stuffing around trying to upgrade drive controller drivers or firmware versions?

The Ultra units originally shipped with 4.2.12 back in 2010. The Ultra Plus was released later than the Ultra. If the NAS you get has firmware older than 4.2.16 then you'll need to do a firmware update to get support for 3TB drives. it's easy enough to update the firmware.

1. Put one disk in the NAS
2. Do a factory default: http://www.readynas.com/kb/faq/boot/how_do_i_use_the_boot_menu
3. Update the firmware: http://www.readynas.com/RAIDiator_x86_4_2_22_Notes
4. Verify that the firmware update was successful
5. Power down, put the rest of the disks in and do another factory default

This procedure will give you a clean setup on the latest firmware.

Also if the single disk you put in the NAS is a 3TB one it should still be recognised on firmware older than 4.2.16 but with <1TB of capacity. This is O.K. The firmware update should still work fine.