Select a standard or customer Storage Profile to choose where to write your new writable data, or historical (Snapshot) data. By default The Storage Center will write data to Raid 10 or Raid 10DM. By default Snapshot data will go to Raid 5-5, 5-9. 6-6, or 6-10. Or you can create a customer Storage Profile on where to write your data. So how much data goes to Raid 10DM, or Raid 6-10 will be dependent upon on how much you write, and how much historical data you have.

So, how the storage center decide how much capacity in RAID 10DM and RAID 6 ? Does 50% 50% ? 

Thank you

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@DELL-Bob Mi wrote:

Sorry, my previous reply did not get fully posted.

You cannot specify the amount of space in each Raid configuration. I think this document may be helpful for your question:
Understanding RAID with Dell SC Series Storage
http://en.community.dell.com/techcenter/extras/m/white_papers/20442059

You can also reference this guide:

Dell Storage Manager 2016 R3 Administrator’s Guide

https://topics-cdn.dell.com/pdf/storage-sc2000_administrator-guide_en-us.pdf

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So, if i create storage profile that used only raid 6 and assign it to all of my volume, all of the data will be written to raid 6 ? So the usable capacity of the storage will be using raid 6, there is no capacity for raid 10DM. At the end, i have more capacity better than using default storage profile.

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@DELL-Bob Mi wrote:

Select a standard or customer Storage Profile to choose where to write your new writable data, or historical (Snapshot) data. By default The Storage Center will write data to Raid 10 or Raid 10DM. By default Snapshot data will go to Raid 5-5, 5-9. 6-6, or 6-10. Or you can create a customer Storage Profile on where to write your data. So how much data goes to Raid 10DM, or Raid 6-10 will be dependent upon on how much you write, and how much historical data you have.

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So, how the storage center decide how much capacity in RAID 10DM and RAID 6 ? Does 50% 50% ? 

Thank you

Sorry, my previous reply did not get fully posted.

You cannot specify the amount of space in each Raid configuration. I think this document may be helpful for your question:
Understanding RAID with Dell SC Series Storage
http://en.community.dell.com/techcenter/extras/m/white_papers/20442059

You can also reference this guide:

Dell Storage Manager 2016 R3 Administrator’s Guide

https://topics-cdn.dell.com/pdf/storage-sc2000_administrator-guide_en-us.pdf

There will always be a small amount of data in Raid 10 DM. This is the configuration data that is stored on the disks for the system. It should be minimal. If Data-Reduction is used (Compression/Deduplication) it will use the Raid 10 DM space for the compression metatdata.

Dell Storage Center OS 7.0 Data Reduction with Deduplication and Compression
https://downloads.dell.com/solutions/storage-solution-resources/Data-Reduction-SCOS-7.0-Dell-EMC-2018-(2100-SB-SC).pdf
Page 6: A minimum of six managed SSD (flash) drives plus a hot spare are required. SSDs provide the read performance required for metadata generated by data deduplication.

Since your screen shot shows active volume space I would confirm that you have all Volumes set correctly. I would also verify you have the correct stripe width set. Refer to page 234 of the Dell Storage Manager 2018 Administrator's Guide
https://topics-cdn.dell.com/pdf/dell-storage-manager_administrator-guide3_en-us.pdf

For the RAID 6 Stripe Width drop-down menu you should have the width set as 10 disks.

You mention this is an All Flash array. Is there only a single tier of disks?