Re: [suse-oracle] Best use of ASM

An easiest way is to make 5 RAID1 virtuial disks and use them in ASM with external redundancy. No sense to make double stripping - one in RAID-10 and another in ASM. SW RAID in ASM is by definition not so good as any hardware raid, so no much sense to use normal redundancy as well.

(On the other hand, if I create non-RAC database system, I woul dnot use ASM at all. I'd better use RAID-10 for all disks except system disks /RAID-1/, LVM + ext3 file system + normal files. ASM is in reality a huge headache.)

  ----- Original Message ----- 
  From: Stacy Gaddy 
  To: [email protected] 
  Sent: Thursday, June 03, 2010 2:20 PM
  Subject: [suse-oracle] Best use of ASM


  I am in the process of building a new server and considering using ASM. The configuration is as follows:


  2 disks - RAID 1 - SLES11/Oracle 11gR2
  12 disks on a raid controller to be used for Oracle.


  Traditionally I have used RAID 10 or RAID 1 depending of type of files being stored on the logical disk. Data on RAID 10, control, redo, and archive on RAID 1.


  How would you divide up the 12 disks between control, redo, data, and FRA? Would you use hardware RAID instead of the built-in Oracle mirroring and striping?


  There doesn't seem to be any good documentation out there to give best practices relating to using hardware RAID vs ASM redundancy.


  Thanks,
  Stacy


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