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RAID 5 with hot spare or RAID 6 for Production System running two virtual Servers

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http://serverfault.com – We are buying a dual hex core ibm x3650 with 64 GB RAM and 7x300 GB HDD. This server is hosting two virtual servers, web server and database server. I am using Double take high availability to replicate the database into a different physical machine. Veeam is used to backup the virtual servers every night. I was wondering which RAID configuration is best for the environment. RAID should meet the following requirements: At the time of failure or rebuilding the array, less chance of data corruption. Otherwise corrupted data will be replicated to another system As these are production sy (HowTos)

taskli's picture
Submitted by taskli on 05/15/2012 – Made popular on 05/15/2012

Stories similar to RAID 5 with hot spare or RAID 6 for Production System running two virtual Servers

So here is what I have currently:

8 SAS Drives total 6 Drives setup as RAID 5 as Virtual 1. 1 Drive setup as Hot Spare. 1 Drive in Ready state that is not part of the RAID and is not set as a hot spare.

Basically, everything on this server is setup on the RAID 5 as one virtual disk (OS, data, etc) and partitioned out. I want to separate things out a bit.

We're discussing options for a new server. 8 users, SBS2011, Exchange, SQL

We have one supplier recommended the following drives:

2 x 146GB SAS RAID 1 - used by the virtual host operating system

2 x 500GB SATA RAID 1 - used by the SBS servers system and data drive

2 x 146GB SAS RAID 1 - used by the SQL server

Is this a good / recommended way to structure these drives?

We have some servers that run in very harsh environments (research vessel) that need to have high-availability.

We have software RAID 1 for some measure of resiliency, along with proper data backups (tapes etc), however we would like to be able to break out a new server and re-image it (including RAID setup) from a known good copy if the hardware completely fails on the production box.

We have a legacy database system based upon MS SQL running on Windows Server 2003. The client software will only run on Windows XP.

We have recently had success converting a client into a virtual machine and running it under Fusion on Mac minis. So far, it is working incredibly well.

I am looking at the specs and manual for the IBM System x3650. According to the specs a ServeRAID-8k-l hardware RAID comes standard, but there's an option to upgrade to ServeRAID-8k.

Back again with a very quick tip: RAID disk array configuration.

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I have a few questions about RAID 5, BBWC (Battery Backed Write Cache), filesystem (ext3) and optionally mysql.

I have a hypothesis and I ask Server Fault community to validate or not this one:

-The system is UP, applications works with database and use transactions

-The RAID system is configured with RAID5,write caching and battery (BBWC)

With this solution, when OS receive write ACK, data ar