Netgear ReadyNAS RR4360 Storage erweiterung

I did so with a ReadyData RD5200 converted to ReadyNAS OS, which also has the external SAS ports, and a NetApp 24-bay drive shelf.  It worked to an extent with both SATA and SAS drives.  The enclosure and drives in it didn't show up in the GUI.  Once I created a volume via SSH using volume_util though, it was visible in the GUI and all normal GUI functions worked with it (maintenance, backups, etc.).  But there was no way to monitor drive health, etc. through the GUI, so I used HDSentinel.  With a 4360, you may have a lot of volumes already, and I'm not sure if the OS has a limit.  There is nothing in any documentation I've seen regarding a limit.  Oddly, all the drives in both chasses did show up in RAIDar.

Although it will let you, spanning two chasses with a volume is not recommended.  And with the drives of the expansion not showing in the GUI, there is no telling how it would be presented in the GUI when some drives show up and some don't.

I have since upgraded the drives in my main NAS and moved some archived data to a smaller, dedicated NAS, so I no longer use an external drive shelf. 

I believe that if you use a 12-bay SuperMicro drive shelf, it will show up in the GUI as an EDA2000.  The EDA2000 is just an OEM SuperMicro unit, and accidently connecting the backplane of the RD5200 (which is  the same backplane as what's in a SuperMicro 12-bay unit because the RD5200 is also a semi-custom SuperMicro server) to the wrong SAS port caused it to show up as an EDA2000 with no internal drives showing.  By extension, a 24-bay SuperMicro will likely show up as an EDA4000 or two EDA2000's (depending on whether it's one with 24 bays in front or 12 in front and 12 in back).