What are the best RAID levels to use with SQL Server?

1.	What are the best RAID levels to use with SQL Server?
Answer» Before choosing the RAID (Redundant Array of Independent DISKS) we should have a look into the USAGE of SQL Server files. As a basic thumb rule “Data Files” need random access, “Log files” need sequential access and “TempDB” must be on the fastest drive and must be separated from data and log files. We have to CONSIDER the below FACTORS while choosing the RAID level: Reliability Storage Efficiency Random Read Random Write Sequential Read Sequential Write Cost. As an Admin, we have to consider all of these PARAMETERS in choosing the proper RAID level. Obviously, the choice is always between RAID-5 and RAID-10

Answer»

Before choosing the RAID (Redundant Array of Independent DISKS) we should have a look into the USAGE of SQL Server files.

As a basic thumb rule “Data Files” need random access, “Log files” need sequential access and “TempDB” must be on the fastest drive and must be separated from data and log files.

We have to CONSIDER the below FACTORS while choosing the RAID level:

Reliability
Storage Efficiency
Random Read
Random Write
Sequential Read
Sequential Write
Cost.

As an Admin, we have to consider all of these PARAMETERS in choosing the proper RAID level. Obviously, the choice is always between RAID-5 and RAID-10

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