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MD3220 and Md1220 - Questions about SSD Cache, High Performance Tier, and sizing disk groups

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I am migrating to an MD3220 and MD1220 which has the SSD cache and high-performance tier feature keys installed and enabled. I have 6 x 200 GB SLC SSD SAS drives and 24 x 900GB SAS HDDs in the MD3220, MD1220.

When I create the SSD Cache, should I assign all 6 SSDs to the cache? For maximum performance is it best to create 1 large RAID-10 disk group then create smaller virtual disks, making sure “Use SSD cache” is enabled?

Thank you very much!

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RE: MD3220 and Md1220 - Questions about SSD Cache, High Performance Tier, and sizing disk groups

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Hi,

You will want to put all the SSDs in one cache array. Page 110 http://downloads.dell.com/manuals/common/md32xx_md36xx_administrator%20guide_en%20us.pdf

Unless you have a need to break it up into smaller RAID 10s you can just create one big one.

Thanks,
Josh Craig
Dell EMC Enterprise Support Services
Get support on Twitter @DellCaresPRO
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Moderator
Moderator

RE: MD3220 and Md1220 - Questions about SSD Cache, High Performance Tier, and sizing disk groups

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Hi,

You will want to put all the SSDs in one cache array. Page 110 http://downloads.dell.com/manuals/common/md32xx_md36xx_administrator%20guide_en%20us.pdf

Unless you have a need to break it up into smaller RAID 10s you can just create one big one.

Thanks,
Josh Craig
Dell EMC Enterprise Support Services
Get support on Twitter @DellCaresPRO
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StlCardsFanJWR
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RE: MD3220 and Md1220 - Questions about SSD Cache, High Performance Tier, and sizing disk groups

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Thank you very much for the reply. I don't want to make any mistakes like I did the first time I created the array. 

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