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I plan to make an HyperV server with 5 or 6 vms, here is the hardware :

Xeon L3426 4core 8 thread
16 go ram
2*2To HDD
Dell H200 Raid Controller (RAID 0 OR 1);

and VMs contains that :

4 vms are windows server 2008 r2 
1 : font end TMG 2010, 
2 : AD DC, 
3 : SHarepoint 2010 +  SQL SEVER 2008 (analyse, report , integration),
4 : TFS 2010

2 vms are debian (apache + tomcat + mysql)

i want to know whats the best raid mode to have better access performance

1) HARD RAID 0;
2) HARD RAID 1;
3) SOFT RAID 0 on 50% of each HDD
4) NO RAID But i would put 3 vms on each HDD (backup on the other disk)
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1 Answer 1

up vote 2 down vote accepted

Let's go through your options;

  1. Hardware R0 - could be faster but if you lose a disk you lose all your data.
  2. Hardware R1 - plenty fast enough but you can lose either disk and carry on just fine, replacing the lost disk later for full resilience.
  3. Software 0 - just as risky as hardware R0 but with added CPU and IO overhead.
  4. No RAID - no less risky that hardware R1 but more complex and with no auto-failover mechanism built in.

Go with option 2) Hardware RAID 1, no question, it's the only way.

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why that ? security ? but if i mirror backup with 2 disk ? (no raid).... with separate disk can i get better performance than 1 raid 1 ? –  Bgnt44 May 7 '11 at 12:47
    
No, I've added some extra detail, see above. –  Chopper3 May 7 '11 at 13:13
    
ok thanks , i'll follow your advice, until i got 4 disk –  Bgnt44 May 9 '11 at 14:32

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