vmware and VSA -> Raid

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.
Eprs_AdminSystem ArchitectAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
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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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
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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Eprs_AdminSystem ArchitectAuthor Commented:
each server has 9 TB.
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Eprs_AdminSystem ArchitectAuthor Commented:
with bother servers I want to use VSA.
I want good performance but I will not loose so much space...
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Eprs_AdminSystem ArchitectAuthor Commented:
which you would recommend for using VSA ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
RAID 10
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Eprs_AdminSystem ArchitectAuthor Commented:
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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Eprs_AdminSystem ArchitectAuthor Commented:
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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Eprs_AdminSystem ArchitectAuthor Commented:
when I have 9.2TB on each server. I have two hosts.
How much I have with VSA and Raid10 ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
What size of disks do you have in the server?
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Eprs_AdminSystem ArchitectAuthor Commented:
I have 8 disks in each server with 1.2TB each.
Total in one server 8x 1.2TB
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, so configured as RAID 10

4.8TB (approx 4.5 usable for VSA, clustered between both Nodes)
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Eprs_AdminSystem ArchitectAuthor Commented:
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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Eprs_AdminSystem ArchitectAuthor Commented:
ok, that means in VSA I cannot setup LUN´s ?
That has to be done before?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
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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Eprs_AdminSystem ArchitectAuthor Commented:
ok thanks a lot
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No problems, thanks.
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