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тАО11-02-2009 12:21 PM
тАО11-02-2009 12:21 PM
Solved! Go to Solution.
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тАО11-02-2009 12:34 PM
тАО11-02-2009 12:34 PM
Re: Adding drives to EVA 4400
the mixture of the disks is allowed but not recommended from the performance point of view:
http://h20195.www2.hp.com/V2/GetDocument.aspx?docname=4AA2-0914ENW&cc=us&lc=en&jumpid=reg_R1002_USEN
it is a good practice to group 8 physical disks to create one RSS (8 phys. disks by default)
the failure protection is kept on the DG level, so after the disk addition or a new 300GB DG creation, you can online change the config of the disk protection. If you go to the mixture it will reserve 2 bigger disks (2x300GB) in the mixed DG
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тАО11-02-2009 12:36 PM
тАО11-02-2009 12:36 PM
Re: Adding drives to EVA 4400
You'll be wasting 4.8TB!! Create a new host group instead with 16 drives. Add more drives as and when you have them.
Adding spindles does not always increase the performance, you need to consider other variables involved too.
If you want to add drives, add one at a time or the controller will sleep.
I would strongly suggest not to go for this setup.
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тАО11-03-2009 12:37 AM
тАО11-03-2009 12:37 AM
Re: Adding drives to EVA 4400
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тАО11-03-2009 01:13 AM
тАО11-03-2009 01:13 AM
SolutionNow that you have the disks inserted and running, add them to the disk group all at the same time. This way you'll avoid doing several levelings one after another, and the EVA will know how many disks there will be, so it can think about how to arrange the RSSs.
The disk failure protection = double is not needed on an EVA4000 unless it's in a very difficult to reach place and you do not have spare disks available or cannot get one in a few hours.
Regarding performance, the 300 GB disks will have more load on average, but you'll have more spindles to spread the total, so in the end, each disk has less load than before.
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тАО11-05-2009 07:08 AM
тАО11-05-2009 07:08 AM