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SQL2014 best RAID practice

Posted on 2015-01-08
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Last Modified: 2016-12-08
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.
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Question by:Eprs_Admin
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Accepted Solution

by:
Eugene Z earned 2000 total points
ID: 40540981
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
"
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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Author Comment

by:Eprs_Admin
ID: 40557193
Thanks a lot
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Author Closing Comment

by:Eprs_Admin
ID: 41650337
Great, I have found the best setup for my SQL AG.
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