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тАО09-01-2010 01:25 AM
тАО09-01-2010 01:25 AM
But when I display the position of our disk groups (regardless of how many disks are member of that disk group) they are spread around all enclosures and it looks like this was done randomly. We're expected to see a clear order of these disks.
Any explanation?
Sincerely
AWo
Solved! Go to Solution.
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тАО09-01-2010 09:10 PM
тАО09-01-2010 09:10 PM
Re: EVA and best practises regarding RAID sets (RSS)
Hope this helps!
Regards
Torsten.
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тАО09-02-2010 11:32 AM
тАО09-02-2010 11:32 AM
Re: EVA and best practises regarding RAID sets (RSS)
AWo
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тАО09-02-2010 06:29 PM
тАО09-02-2010 06:29 PM
SolutionThat said, there is some way (beyond my knowledge) that an EVA will try to lay out disks to form an RSS group, but even if it does it "perfectly" on a brand new EVA with at least 8 shelves, once you add some more disks, shelves or have disks fail and be relaced, all bets are off as to how "nice" the RSS groups will be laid out.
The short story is - why worry? Unless you have a total shelf failure, you are unlikely to lose access to data. And over time, it is almost impossible to expect the EVA, with disk replacements and additions, will keep things laid out nicely preventing at least one or two of your shelves being at risk of failing and causing loss of data access until replacement.
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тАО09-03-2010 12:45 AM
тАО09-03-2010 12:45 AM
Re: EVA and best practises regarding RAID sets (RSS)
I have no worries but I wanted
- just to know it because I'm curious (that's part of my job and my attitude to work)
- to be sure that everything is running correctly as the behaviour we see doesn't fit to what HP wrote in the documentation.
- I want to prevent sub-optimal operation due to a wrong configuration when the box gets expanded as everybody (HP partners, documents, HP teachers emphasized on that when an EVA gets expanded).
But it seems that this won't happen so everything is fine.
Sincerekly & thanks
AWo
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тАО09-03-2010 12:47 AM
тАО09-03-2010 12:47 AM