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Multiple Mirrors

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Jason Jayko_1
Occasional Advisor

Multiple Mirrors

I currently have an sever with two drives configured with a raid 1+0. Can I add two more drives and configure another raid 1+0 ?
7 REPLIES
Chris Saindon
Valued Contributor

Re: Multiple Mirrors

Hello Jason,

Absolutely!

A nice, short answer for you.

Chris

Black holes are where God divided by zero - Steven Wright
Jason Jayko_1
Occasional Advisor

Re: Multiple Mirrors

will it require a reboot or can it be done on the fly? thanks for the quick response
Chris Saindon
Valued Contributor
Solution

Re: Multiple Mirrors

Hello,

It can be done completely on the fly. I recommend, as always, to have a backup "Just incase" though.

I recommend using the latest Array Config Utility to do this though.

Software Directory (To get the software page for any server and O/S)
http://h18023.www1.hp.com/support/files/server/us/index.html

I should also make note that I'm assuming you're using a Smart Array controller.

Chris
Black holes are where God divided by zero - Steven Wright
Ivan Ferreira
Honored Contributor

Re: Multiple Mirrors

Two drives cannot form a raid 1+0. Two drives can form a Mirror (Raid 1). You need at least 4 drives for a 1+0.

But don't worry, we understand your question, and it's possible.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Jason Jayko_1
Occasional Advisor

Re: Multiple Mirrors

Ivan, You are incorrect on the raid 1+0 config. You can do it with 2 drives
Prashant (I am Back)
Honored Contributor

Re: Multiple Mirrors

we need to have 4 drives for raid 1+0
we need to have 2 drives for raid 1

Prashant S
Nothing is impossible
raadek
Honored Contributor

Re: Multiple Mirrors

Guys,

It's always good to know what exactly we are talking about - I mean a server model, controller, drives, etc.

Under normal circumstances it is not possible to create RAID 1+0 having just two drives - you need to have at least for.

However there is small catch here - Intel Matrix Storage Technology: http://www.intel.com/design/chipsets/matrixstorage_sb.htm
This allows splitting every hard drive in 2 parts & dedicating each part for different RAID level. Hence you can have 'sort of' functionality of RAID 1+0 (or rather 0+1) having only 2 drives.

But I severely doubt that adding drives on the fly is possible.

Rgds.
Don't panic! [THGTTG]