> What I want is to send a signal from the online server to the 'offline' server > to take over the disk, unmounts, offline and detach first.
NFS can sort of do this but if you are trying to do failover then its a bit more complicated because 1. You may be in a situation where you switch because a box crashes so you need to do disk recovery. 2. You need an environment where you can't accidentally have both of them live 3. There are cases where you may see stale file handles as a result of a failover where a client is using things like deleted but open files. Red Hat has out of the box NFS clustering and I'm pretty sure SuSE likewise (as well as drbd support for live mirroring and cluster file systems like GFS2 so you can have two live copies at once) ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
