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тАО01-26-2005 09:06 AM
тАО01-26-2005 09:06 AM
EVA: Rearrange disks when adding new enclosure?
Now we are going to add 2 new enclosures, but these enclosures have only 4 disks each.
I know the best practice is to distribute disks evenly across all enclosures. Whe have the opportunity to shut down the EVA, and re-arrange the existing disks to use all 8 enclosures so that we have the same amount of disks per enclosure. But is this recommended, or is it better to just leave the new enclosures with their 4 disks each, and the old enclosures fully populated?
My concern is that by moving around the disks the RSS's are going to be disarranged and perhaps causing more problems than benefits.
Any suggestions?
Thank you!
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тАО01-26-2005 06:37 PM
тАО01-26-2005 06:37 PM
Re: EVA: Rearrange disks when adding new enclosure?
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тАО04-27-2005 11:42 AM
тАО04-27-2005 11:42 AM
Re: EVA: Rearrange disks when adding new enclosure?
Uwe wrote that it is possible to "destroy" RSS by putting paired disks on the same shelf. My question is: Disks with which RSSID are paired? 0-1 2-3 etc... or 0-2 1-3 etc...?
Regards - Tomasz
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тАО04-27-2005 05:46 PM
тАО04-27-2005 05:46 PM
Re: EVA: Rearrange disks when adding new enclosure?
From what I can tell, paired disks are 0-1, 2-3, ...
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тАО04-27-2005 06:15 PM
тАО04-27-2005 06:15 PM
Re: EVA: Rearrange disks when adding new enclosure?
I have EVA5000 2C12D with 56 72GB disks and 96 32GB disks.All disks are distributed equally (as possible) in all shelves, I use only Raid1 Vdisks.
When I started with this configuration the RSS level was ???Mirrored???. Today, after some removing and adding physical disks and creating and deleting Vdisks RSS level is ???None"... I think that moving disks "destroyed" some RSS (paired disks are now in single shelf). I need to find such "destroyed" RSSs - maybe if I ungroup disks from them I get "Mirrored" RSS level.
Take a look at attachment - I'm little supprised with RSS 8 - it has strange RSS indexes - 0,1,2,3,6,7,8,9. I need to write some script to find RSSs with two or more disks on the same
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тАО04-27-2005 07:19 PM
тАО04-27-2005 07:19 PM
Re: EVA: Rearrange disks when adding new enclosure?
I have a low-priority project to analyze EVA configurations and one part of this is an RSS checker, but I am missing real life test data.
Let's make a deal:
run the attached commands, put them into a .TXT file, attach to a response and I will see what I can find out.
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тАО04-27-2005 07:54 PM
тАО04-27-2005 07:54 PM
Re: EVA: Rearrange disks when adding new enclosure?
But in a meanwhile please take a look at this RSS:
72 12 0 12 7
147 12 1 10 7
146 12 2 11 7
154 12 3 5 7
134 12 4 2 9
157 12 5 2 10
52 12 6 1 5
27 12 7 6 5
(disk,RSSid,rssidx,shelf,bay). I think, that two disk 134 and 157 should be a pair and they are in the same shelf (2). I think it is wrong.
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тАО04-27-2005 09:19 PM
тАО04-27-2005 09:19 PM
Re: EVA: Rearrange disks when adding new enclosure?
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тАО04-28-2005 06:20 AM
тАО04-28-2005 06:20 AM
Re: EVA: Rearrange disks when adding new enclosure?
I just ungrouped two suspected disks and RSS level is now "Mirrored".
I'll send you config file after finishing migration
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тАО04-28-2005 06:59 PM
тАО04-28-2005 06:59 PM
Re: EVA: Rearrange disks when adding new enclosure?
here is config file from my EVA after ungrouping disks and data leveling.
/T