Are you looking for a disk stress test tool? Something like this:

http://blogs.msdn.com/storwdk/pages/disk-stress-test.aspx

Do you run the risk of filling the HBA queues first? There are a lot of HBA settings that might affect your testing.

glen

i see following information in my knowledge base. May be use the metalun concept for the queue full condition..

"The HBA controls the queue depth for each LUN.  With a queue
depth of eight and two HBAs the server can drive 16 concurrent I/Os to
each logical volume.  With four HBAs and the queue depth still at eight,
the server can drive thirty-two concurrent I/Os.

This is critical when using EMC meta volumes.  With an eight-way
meta, the host only "Sees" a single LUN and will limit the queue depth
to eight"

Hi, SKT

Thanks

Can you please guide me to this knoledge base post. I'm interested in EMC recomendations about defining the queue depth parameters. Don't you thinc queue depth of eight might be too low and cause QUEUE FULL conditions?

Hi, Kelleg.

Thanks. Can you throw me some tips?

Alec

Alec,

Each HBA vendor has a sectiom on their web site for EMC specific HBA's and drivers - there is an installation and config manual for each driver with the recommended settings for the HBAs. You might find something there.

I'll ask one of the performance engineers if they have a way to cause queue full on the array. Just an FYI, I've not seen that before.

glen