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| New 7200 - Creating new CPGs so they are balanced https://3parug.net/viewtopic.php?f=18&t=593 |
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| Author: | corge [ Fri Feb 14, 2014 2:29 pm ] |
| Post subject: | New 7200 - Creating new CPGs so they are balanced |
I currently have a new 7200 and it comes with 2 nodes (no 2.5in disks) and two shelves beneath it, with 48 drives total. My question is, how do I need to create CPGs so that they are balanced across the nodes properly and the shelves correctly? What set size am I looking for?...etc.. Thanks. |
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| Author: | hdtvguy [ Fri Feb 14, 2014 2:36 pm ] |
| Post subject: | Re: New 7200 - Creating new CPGs so they are balanced |
I am not a 7200 expert, but if you want shelf HA then your set can not be bigger than the number of shelves, so if you have drives in 4 shelves and 2 are on each controller than RAID 5 3+1 is best you can do. |
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| Author: | corge [ Fri Feb 14, 2014 2:42 pm ] |
| Post subject: | Re: New 7200 - Creating new CPGs so they are balanced |
These are going to be DEV stuff only, so going magazine availability I believe. I have three shelves total though, and the one with the 2.5in disks that hold the controllers does not have drives in it. I only have two shelves with drives in them. |
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| Author: | hdtvguy [ Fri Feb 14, 2014 3:40 pm ] |
| Post subject: | Re: New 7200 - Creating new CPGs so they are balanced |
I am not sure if MAG HA is even valid in a 7200, the concept of a mag does not exist, unless they do it logically, the back plane in the shelf is still a common point a failure. If this is DEV then you could make the set whatever you want then. |
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| Author: | Richard Siemers [ Sat Feb 15, 2014 3:33 am ] |
| Post subject: | Re: New 7200 - Creating new CPGs so they are balanced |
A mag is a single drive carrier in the 7200, E200, F200 etc. You shouldn't *need* to do anything. In your setup, you might want to pick a set size that is evenly devisable into 48. For example raid 5 with a set size of 6. |
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