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We have bought one hp msa 2000 storage array with sas support,Two DL380g6 servers with dual processor and 16gb Ram.About to use VMware Configuring all operating system and oracle data on san,two servers each with two sas hba,ywo controllers on san for redundant connectivities from servers ,no san switch or fibre channels to decrease the budget.<br />
1.We have 20hard disk 146gb 10k,which raid levls we should go for <br />
a:We have oracle database and redhat linux server space requirement for data base is 800gb. Thinking of 12hdd as RAID10<br />
b:All operating systems windows 2003 standard edtion around 5 and redhat linux1,filserver capacity 300gb<br />
Thinking of: RAID5 or 6<br />
c:Two hot spare<br />
d:Two Raid 0 for log files.<br />
The other options whole SAN with RAID6or 5 for a better i/o due to more hard drives spindle.<br />
Is it a good way or other best practice can be advised.
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We have bought one hp msa 2000 storage array with sas support,Two DL380g6 servers with dual processor and 16gb Ram.About to use VMware Configuring all operating system and oracle data on san,two servers each with two sas hba,ywo controllers on san for redundant connectivities from servers ,no san switch or fibre channels to decrease the budget.
1.We have 20hard disk 146gb 10k,which raid levls we should go for 
a:We have oracle database and redhat linux server space requirement for data base is 800gb. Thinking of 12hdd as RAID10
b:All operating systems windows 2003 standard edtion around 5 and redhat linux1,filserver capacity 300gb
Thinking of: RAID5 or 6
c:Two hot spare
d:Two Raid 0 for log files.
The other options whole SAN with RAID6or 5 for a better i/o due to more hard drives spindle.
Is it a good way or other best practice can be advised.

RAID Levels for SAN Msa2000

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

RAID stands for Redundant Array of Independent Disks.

RAID is data storage technology that allows multiple drives to be used together as a single virtual drive for reasons such as fault tolerance, reliability and performance. 

There are several different levels of RAID that determine how the data is stored and the level of redundancy achieved across the drives.