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DELL-Sam L
Community Manager
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34386 Points
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Posted October 31st, 2018 08:00
Hello SC Newbie,
Here is a breakdown of how the Raid is used.
Type
Raid Type
Description
Required Disks
Data Disks
Overhead %
Efficiency %
Redundant
R10-2
Mirror
2
1
100%
50%
Redundant
R5-5
Parity
5
4
25%
80%
Redundant
R5-9
Parity
9
8
12.50%
88.75%
Dual Redundant
R10-DM
Dual Mirror
3
1
200%
33.33%
Dual Redundant
R6-6
Dual Parity
6
4
50%
66.66%
Dual Redundant
R6-10
Dual Parity
10
8
25%
80%
Please let us know if you have any other questions.
Hi Sam,
Thank you for the response.
I have read the document but still have no answer. Can you explain me how to calculate usable capacity ? Because single redundancy contains 2 kinds of raid (10 and 5) and dual redundancy contains 2 kinds of raid (10DM and 6).
Thank you
DELL-Sam L
Community Manager
•
8058 Posts
•
34386 Points
8733
1
Posted October 30th, 2018 09:00
Hello SC Newbie,
Here is a link to a guide for Understanding RAID with Dell SC Series Storage. http://en.community.dell.com/techcenter/extras/m/white_papers/20442059
Please let us know if you have any other questions.