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 Post subject: CPG raid 5 set size 7+1
PostPosted: Fri Jan 13, 2012 2:39 am 

Joined: Fri Jan 13, 2012 2:16 am
Posts: 2
We have 8 cages,128 drives (600Gb FC) in 3Par F400 array and all space is free.
We want to create CPG raid5 7+1 on all disks and availability cage.
But we have error messages:
no available space for given (invalid?) parameters.
CPG created only raid5 3+1 with availability cage or any raid5 with availability magazine.
How to create raid5 7+1 with availability cage in our configurations?


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 Post subject: Re: CPG raid 5 set size 7+1
PostPosted: Mon Jan 16, 2012 11:08 am 

Joined: Mon Oct 10, 2011 5:46 am
Posts: 7
I got the same error message :!: when tried creating a RAID6 CPG.
My issue was that on the Allocation settings - shown only when you check the 'Advanced Settings Option' , the Availability was set to Cage (default)
In this case the Inserv did not had enough cages (shelves) to satisfy the raid size which is 10=8+2. When I changed the availabilty to Magazine I could proceed creating my desired CPG. :)


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 Post subject: Re: CPG raid 5 set size 7+1
PostPosted: Fri Jan 20, 2012 3:04 am 

Joined: Fri Jan 13, 2012 2:16 am
Posts: 2
Failed to create Raid 5 7+1, because a have 4 controllers.
2 controllers connected to 4 cages (daisy chained) and another 2 controllers connected to another 4 cages.
In this configurations not permitted create Raid 5 7+1


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 Post subject: Re: CPG raid 5 set size 7+1
PostPosted: Tue Jan 24, 2012 12:18 am 
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Joined: Tue Aug 18, 2009 10:35 pm
Posts: 1226
Location: Dallas, Texas
I don't think anything is "daisy chained", I suspect what you meant is 4 shelves are attached to 2 controllers, and the other 4 shelves are attached to the other 2 controllers. The best "cage availability" you can do will be raid5 3+1. But you should still be able to do 7+1 with "mag availability".

In my environment I use cage availability for production and magazine availability for dev/stage and qa.

--Richard

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The views and opinions expressed are my own and do not necessarily reflect those of my employer.


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