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May 28th, 2013 07:00
RAID SSD config recommendation
Hi all,
i'd like to upgrade my T620 server with 3 SSD drives. A PERC T710 storage controller is in use. Which RAID configuration is recommended for SSDs? RAID5? What about TRIM/garbage collection and all the other SSD features? Is the storage controller capable of the IOPS?
Thanks in advance!
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DELL-Geoff P
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May 28th, 2013 07:00
RAID 5 will work well and you should have no other issues with this configuration. All the other features of should function as well.
Fastpath I/O is only supported on the H710P and H810, so no IOPS .
Regards,
reinhard1982at
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May 28th, 2013 08:00
What is Fastpath I/O? What do you mean with "so no IOPS". Will i see any performance impact compared to native SSDs?
DELL-Geoff P
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May 28th, 2013 08:00
Fastpath I/O is a method of increasing Input/Output Operations per Second (IOPS) by using the 2nd core of the PERC (Gemini core) to directly execute I/O and completely bypass caching. It does support IOPS, but FastPath inceases the speed. I apologize for the unintentional error.
Fastpath I/O is most beneficial for SSD disks.
Fastpath I/O is not available on H710 controller, only available on H710P and H810 controllers.
You will see performance gains over the SAS\SATA drives.
DELL-Geoff P
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May 28th, 2013 12:00
Here is some comparison's on the R720 and the H710P : http://www.dell.com/downloads/global/products/pvaul/en/dell-r720-drive-options.pdf
reinhard1982at
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May 28th, 2013 12:00
Great details, thanks for sharing! Do you have any performance numbers how much speed you get more if using the 710p?
reinhard1982at
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May 29th, 2013 01:00
That's a lot, i would say! Do you think it's better to not create a RAID over the SSDs?
reinhard1982at
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May 31st, 2013 04:00
Any guideline to my previous question? Thanks!
DELL-Geoff P
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May 31st, 2013 08:00
With the Perc controllers, you will have to setup a RAID array, as they do not support JBOD. The minimum you would set up would be RAID 0 on a single drive if you wanted to go that route. Depending on what you are going to run, I would setup a RAID 1 for my OS, and a RAID 5 or higher for my data.