A Linux FailSafe system supports the following disk connections:
RAID support
Single controller or dual controllers
Single or dual hubs
Single or dual pathing
JBOD support
Single or dual vaults
Single or dual hubs
Network-mirrored support
Clustered filesystems such as GFS
Network mirroring block devices such as with DRBD
Note: Network mirrored devices are not discussed in the examples within this guide. However, the Linux FailSafe configuration items that are set for shared storage apply validly to network-duplicated storage.
SCSI disks can be connected to two machines only. Fibre channel disks can be connected to multiple machines.