Hi,
In a SAN enviornment, can two servers have access to the same storage
device
at the the same time?
I want to implement a failover, one server doing all the writing, the
other
only read from the disk. If one server goes down, the other will do both.
Is this possible and normal way to use SAN?

Where do you configure this, on server, storage or switch?
Thanks

Most configurations I've seen that are working like this are cluster
configurations,
like other posters have said here. This kind of application running on the
server
itself, and cluster nodes are talking to each other via ip-heartbeat. There
are lots
of different concepts out there, depending on whatever solution you prefer -
you can choose between native OS solutions (e.g HACMP/AIX, MCS/Windows etc.)
In addition there are also 3rd party products available, mostly OS
independed like
Veritas Cluster Manager. For the storage systems you only have to make sure
that
each cluster node can access each LUN.

René