■Linuxでサーバ間でミラーリングを行うソフト「drbd」のダウンロードサイト…「はてな」でも使っているらしい
DRBD is a block device which is designed to build high availability clusters.
This is done by mirroring a whole block device via (a dedicated) network. You
could see it as a network raid-1.
http://oss.linbit.com/drbd/PR