JNbd是NBD服务器。NBD的意思是“网络块设备”：它使您能够通过服务向客户端系统的网络磁盘形象，分区，逻辑卷等。它可以比拟iSCSI和光纤的IP。
JNbd是用Java编写的服务使您磁盘的所有平台上运行Java的能力，例如为所有的UNIX系统，微软Windows和Mac OS等，Linux系统提供磁盘映像能力。
JNbd is an NBD server. NBD stands for “network block device”: it enables you to serve a disk-image, partition, logical volume, etc. via the network to a client system. It can be compared to iSCSI and Fibre over IP.
JNbd is written in Java enabling you to service disk-images from all platforms capable of running Java e.g. all UNIX-systems, microsoft windows, mac os, etc. to Linux systems.
