DRBD (Distributed Replicated Block Device) 是 Linux 平台上的分布式保存系统。其中包含了核心模块，数个用户空间管理程序及 shell scripts，通常用于高可用性（high availability, HA）集群。DRBD 类似磁盘数组的RAID 1（镜像），只不过 RAID 1 是在同一台电脑内，而 DRBD 是透过网络。

DRBD 是以 GPL2 授权散布的自由软件。

DRBD software is a distributed replicated storage system for the Linux platform. It is implemented as several userspace management applications and some shell scripts and is normally used on high availability (HA) computer clusters.

DRBD also refers to the logical block devices provided by the scheme and to the software that implements it. DRBD device and DRBD block device are also often used for the former.