HA on filesystems

The RAID system, beeing hardware or software, will protect your local filesystems against disk failure. But when these filesystems are shared to other system, you need also to protect against failure of the host sharing the filesystem. This can be done by using a SAN and a cluster software that will mount and share again some SAN LUN's if a server failed.

But there are alternative solutions to the costly SAN. The OpenSource community offers you various kind of mechanisms to build highly-available filesystem.

Filesystem replication