SQL2014 best RAID practice

Hi Experts,

I have to install two SQL 2014 servers on premise.
Both server are in an availability group.

What do you recommend for the raid setup ?
I have seen

Adaptive Read Ahead
Read Ahead

Write Back
Write through
Force write back

My partitions are:

OS -> Raid1
DB -> Raid10
LOGS -> Raid10
TempDB -> on SSD with Raid1

But I was not sure with READ AHEAD and WRITE BACK.
Maybe you can give me some hints.
Eprs_AdminSystem ArchitectAsked:
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Eugene ZConnect With a Mentor Commented:
it depends on what for you plan  to use it
also id it VMware? physical? SAN based storage?
How many array controllers? etc..

check
SQL Server Storage Best Practices
http://sqlmag.com/storage/sql-server-storage-best-practices

also check about disk caching
http://www.experts-exchange.com/Database/MS-SQL-Server/Q_27806793.html
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As far as disk caching goes, you need to make sure you are safe or you risk major data corruption risk.  Make sure your cache is backed by a battery or is redundant.  If not, the data in cache will be lost during a reboot/crash and your data is in a hosed inconsistent state. This is especially true with Write Back Caching.
 Check out:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=173993

 Also then go to this link and actually get a real baseline:
http://sqlserverpedia.com/wiki/SAN_Performance_Tuning_with_SQLIO

  You can use it but turn off any READ caching, SQL server is a in memory db engine and will use RAM as much as possible.  Using cache memory for reads is a waste for SQL Server.  If you need to read from your disk cache for SQL, there's something wrong.


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Eprs_AdminSystem ArchitectAuthor Commented:
Thanks a lot
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Eprs_AdminSystem ArchitectAuthor Commented:
Great, I have found the best setup for my SQL AG.
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