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тАО06-22-2010 10:45 AM
тАО06-22-2010 10:45 AM
We have a "mirrored" pair of production EVA8000's running BC & DR.
We have one disk group of (32)SATA 146GB's; one group of (8)1TB FATA's for mirrorcloning on one SAN, and finally another group of (16)SATA 300GBs. All set to Single drive protection.
We have just received 3 more SATA 300GBs for each SAN.
I was planning on just installing them one at a time vertically, then adding them to the exisiting 300GB group, all during business hours.
question: are there any concerns with this, or, do I need to do anything special with adding them into the existing disk group?
Thanks.
Gregg
Solved! Go to Solution.
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тАО06-23-2010 02:24 AM
тАО06-23-2010 02:24 AM
SolutionJust insert the disks on the EVA one by one, wait a few minutes between one and the next. Check in Command View that each disk is detected and there are no problems on the loops.
Then add the 3 disks at the same time to the existing disk group.
It will initiate a leveling to move data from the existing disks to the new ones.
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тАО06-23-2010 03:47 AM
тАО06-23-2010 03:47 AM
Re: Adding disks to existing disk group
So I don't have to worry about doing this during working hours, with the virtual disks being accessed by our users?
Thanks.
Gregg
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тАО06-23-2010 01:18 PM
тАО06-23-2010 01:18 PM
Re: Adding disks to existing disk group
For the 300GB "SATA" (FC I guess) DG.
Going from 16 to 19 disks in the disk group might cause an RSS split.
Now you have two optimal RSS 8+8.
But for 19 you will have 8+6+5? I guess..
Don't have the guidelines in my head but if it goes to 10+9 then no worries.
But if it starts to split - I have seen this cause some performance degradation during the split.
Also with 19 disks in a Disk Group you will not be able to use all space if you are using vraid1 disks. If you are using a lot of vraid1 disks it might benefit you more to add even amount of disks.
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тАО06-30-2010 07:54 AM
тАО06-30-2010 07:54 AM
Re: Adding disks to existing disk group
Hi;
Thanks for the response.
These are all set to VRAID5.
Gregg