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vmware and VSA -> Raid

Posted on 2013-12-16
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Last Modified: 2016-12-08
Hi Experts,

when I have 3 servers , Dell720xd, and I want to use VSA, which raid is the best ?
Because on the hosts I have to setup the raid, and I can choose between 5,50,6,60 and so on.
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Question by:Eprs_Admin
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LVL 119
ID: 39721160
You will need to select based on performance and storage size?

Do you want MAXIMUM PERFORMANCE?

Or Best for Storage available?
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Author Comment

by:Eprs_Admin
ID: 39721165
each server has 9 TB.
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Author Comment

by:Eprs_Admin
ID: 39721169
with bother servers I want to use VSA.
I want good performance but I will not loose so much space...
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Author Comment

by:Eprs_Admin
ID: 39721170
which you would recommend for using VSA ?
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LVL 119
ID: 39721175
RAID 10
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Author Comment

by:Eprs_Admin
ID: 39721203
ok but here I loose 50% of the capacity.
Where do I set this on the host or on the VSA ?
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Author Comment

by:Eprs_Admin
ID: 39721204
on the hosts I can set more different virtual drives.
can I choose here just one drive with all capacity and later I can set more LUN´s with the VSA ?
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Author Comment

by:Eprs_Admin
ID: 39721210
when I have 9.2TB on each server. I have two hosts.
How much I have with VSA and Raid10 ?
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LVL 119
ID: 39721218
What size of disks do you have in the server?
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Author Comment

by:Eprs_Admin
ID: 39721223
I have 8 disks in each server with 1.2TB each.
Total in one server 8x 1.2TB
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LVL 119
ID: 39721232
Okay, so configured as RAID 10

4.8TB (approx 4.5 usable for VSA, clustered between both Nodes)
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Author Comment

by:Eprs_Admin
ID: 39721238
Ok, for VSA I have to count both servers.
The capacity for VSA is 9.2*2/2 = 9.2.
With Raid10 I will have 4.8TB netto for data.
Right ?
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LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39721259
if you have  8x 1.2TB disks on each server, configured as RAID 10, that's 4.5TB of usable storage, this is clustered between servers, so you still only have 4.5TB of storage to use in your cluster for VMs.

So you need to establish if 4.5TB SAN is large enough.

otherwise look at

RAID 5 7.8TB (approx)

RAID 6 7.2 TB (approx)
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Author Comment

by:Eprs_Admin
ID: 39721284
ok, that means in VSA I cannot setup LUN´s ?
That has to be done before?
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LVL 119
ID: 39721288
1. Provision your hardware and storage and create RAID arrays.

1A. Install ESXi 5.5 and create datastores (4.5TB)

2. Install VSA using the 4.5TB datastore.

3. Then provision LUNs from VSA. (out of the chunk of 4.5TB)
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Author Comment

by:Eprs_Admin
ID: 39721645
ok thanks a lot
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LVL 119
ID: 39721651
No problems, thanks.
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