Simulating Disk I/O

Question

We are currently evaluating storage for a virtualization environment (Xen). The storage is an active-active cluster and I need to test some stuff there like split brain scenarios etc.

I'm looking for a tool that simulates a lot of small disk I/O, like a virtual machine would read/write to its image file.

I don't need performance testing tools but more something like data integrity. Is there anything around?

Answer 1

btest[1] is able to do such things, it can read/write in random/sequential and can also verify the data afterwards.

[1] http://sourceforge.net/projects/btest/