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msa20 + 6404..how to add more msa20 enclosures

foler
Advisor

msa20 + 6404..how to add more msa20 enclosures

hello...
I have DL380 g5 with 6404 smart array controller. I have connected one (1) msa20 enclosure with 4 luns (2tb each) and raid 6 adg. Do I can connect 3 more msa20s and configure it in same way each? Or maybe combine 2&2?

What options I have? I need this for backup and archive solution.

thanks
7 REPLIES
gregersenj
Honored Contributor

Re: msa20 + 6404..how to add more msa20 enclosures

The 6404 got 4 channels internal and external.
The internal and external are the same!
So you can connect 4 boxes in total.

You can create the Arrays and logical drives as you prefer.

If you choose to create an array over multible boxes, do consider the impact of loss of an entire box.

BR
/jag
gregersenj
Honored Contributor

Re: msa20 + 6404..how to add more msa20 enclosures

Beware some boxes use 2 channels.

Br
/jag
foler
Advisor

Re: msa20 + 6404..how to add more msa20 enclosures

I want to configure every enclosure as 1 raid6 adg volume and on each 4 logical drives. Is that possible? Simply, I want to have 4 independent raid6 adg volumes.
gregersenj
Honored Contributor

Re: msa20 + 6404..how to add more msa20 enclosures

Yes.

No problem.

Just ensure, that you don't use the internal channels.

I will recommend you to read this:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00729544/c00729544.pdf

BR
/jag
gregersenj
Honored Contributor

Re: msa20 + 6404..how to add more msa20 enclosures

But beware, that a 4 times higher load may impact performance on the controller.

Br
/jag
foler
Advisor

Re: msa20 + 6404..how to add more msa20 enclosures

how to measure controller overhead/utilization?
gregersenj
Honored Contributor

Re: msa20 + 6404..how to add more msa20 enclosures

The measuring part, I have no experience / knowledge on that.

BR
/jag