DRBD - 基於網路的 RAID-1 檔案系統層

DRBD can be understood as network based raid-1.

        +--------+
        |  文件系統 |
        +--------+
             |
             V
        +----------+
        |   塊設備層  |
        | (/dev/drbd1) |
        +----------+
         |            |
         |            |
         V           V
   +----------+  +-----------+
   |  本地硬盤   |   | 遠程主機硬盤 |
   | (/dev/hdb1)  |   | (/dev/hdb1)  |
   +----------+  +-----------+

Reference :
DRBD:What is DRBD
DRBD 使用手冊 - 寶貝煜煜 - ruild - 和訊博客