NAS Question - RAID JBOD

[Major_A]

Once I get some lettuce in my pocket I plan on buying and setting up a NAS box. I don't like the thought of losing 200GB of music and another 8GB of digital pictures. It would also be nice from time to time to have Acronis create images of my drives and have those backed up to the NAS. I plan on setting up the device to run in RAID 1 but I do have a question about JBOD. Does JBOD work like this... If I have a 160GB, 2TB, and a 640GB drives laying around does JBOD essentially just add the three drives together to make one drive (i.e. 2.8TB in this example)?

[dicecca112]

JBOD is just a bunch of disks, ie no raid, just like plugging those drives into a motherboard, they all show up as seperate disks. Some disk enclosures have a BIG/LARGE setting where they combine all the disks together into one large "RAID". There is no redundency in an instanace like that.

[Major_A]

I knew there was no redundancy. And you confirmed what I thought it was.