Conference ssag::ask_ssag

6578.0. "Crash the Cluster" by TKTVFS::FUJITA_T () Mon Apr 14 1997 11:33

In StorageWorks Demo CD-ROM, we can find "Crash the Cluster" game.
I have a quetion on it.

There are two TurboLaser-like CPU systems and two RA450-like subsystems
with SCSI connections to both CPUs. CPUs are connnected with another 
communication line. There are five WSs connected with E-net.
It's a NT cluster.

The goal of this game is "crash the cluster". You can make specific component
by moving curson on it and clicking it. If you click on one of CPUs, it will be 
swallowed by the ground after earthquake, or will be burnt by the lightning.
However you can not crash the cluster. You can crash the cluster after 
clicking another CPU. This shows the function of NT cluster well.

What I can not understand very well is on RAID subsystem. If you click on one
of RA450, the bucketful water will be poured on it, and a row of disks will 
fail. The cluster is still running. I don't think that pouring water always 
causes a row of disk failure. This is a little trivial question.
Anyway the cluster is still running, so the narration says.
I think this is bacause of RAID-5 or RAID-1 availavility within RA450.

Then, if you click another RA450, you can crash the cluster.
WHY? Another RA450 still can run well because of the same reason above, 
I think. It's a hardware availability of RA450. 

Or does it mean NT mirroring between two RA450s? 

Could anyone tell me the meaning of it?
  
Thanks,

Tsuyoshi Fujita/Digital Japan Storage Mktg