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тАО11-17-2009 10:22 AM
тАО11-17-2009 10:22 AM
I understand the benefits of using the same size disks in a diskgroup for Disk Failure Protection reasons, but is there a performance hit by having different size drives within a diskgroup?
Which brings up another question, what about different RPM Drives in the same diskgroup? My older 10k rpm drives are being replaced by 15k rpm drives. I have just been placing them back into the same diskgroup. Thoughts on different RPM speeds within a diskgroup?
Thanks
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тАО11-17-2009 11:20 AM
тАО11-17-2009 11:20 AM
SolutionMixing 10K and 15 drives on a disk group has a similar effect, the 15K drives will do their I/O operations faster, the 10K drives will take a little longer. As the data is distributed among all drives, the slower or bussiest ones influence the maximum IOPS that the disk group can do.
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тАО11-17-2009 11:44 AM
тАО11-17-2009 11:44 AM
Re: EVA5000 and Performance
Hmmm?
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тАО11-17-2009 12:12 PM
тАО11-17-2009 12:12 PM
Re: EVA5000 and Performance
if you replace a 10k RPM disk drive with a 15k RPM one of the same size: the new disk processes I/Os faster, but it does not slow down the whole disk group. The more disks you replace, the faster I/Os get.
Don't understand me wrong:
I don't wish you many bad disk drives ;-)
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тАО11-17-2009 03:04 PM
тАО11-17-2009 03:04 PM
Re: EVA5000 and Performance
It's better to have 20x10K + 10x15K for example, on a single disk group.