Oracle and DRBD - a real HA alternative?

recently I stumbled over a high availability (HA) concept for an Oracle DB server that involves DRBD, at least for the OS and storage part. The concept was presented by an outsourced server provider to their customer.

What made me wonder is, that the customer wants HA for the _database_ and not only for the storage. As far as I know, DRBD only covers the the OS and storage level and not the Oracle Server itself - that's why I'd like to suggest using Data Guard or maybe even RAC.

Does anyone here have practical experience in running DRBD with Oracle Server? Is it possible to create anything near to Data Guard functionality with it? How would you implement a transparent application failover? What about split-brain situations?

Lots of questions, I know. But maybe you can show me a few good pointers to tell me "it's possible at all" or "Oracle Server failover isn't possible with DRBD".

Have a good day!
Uwe

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