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Oracle ASM and RAID 5

654563Oct 10 2008 — edited Oct 11 2008

Hi All..

I have an OLTP database about 80 GB in size and is running on Oracle RAC with ASM on MSW2K3 Server 64 bit.
The diskgroups were not balanced as some disks in the DATA diskgroup were of different capacity. So I suggested to add disks with equal capacities but the problem is that Storage Admin has give given me 3 X 100GB LUNs on RAID 5 for the DATA diskgroup which contains datafiles only. Below is the distribution of diskgroups

DATA - 4 disks - 2X50 , 2X100 RAID 1_0
ONLINELOGS- 2 disks - 2X50 GB RAID 1_0
UNDO -- 2 disks 2X50 GB RAID 5

As RAID 5 is not suggested for OLTP databases because of more I/O and parity reasons, my questions are

1. Whether ASM performs well with RAID 5 or not?
2. Will it impact the performance if only datafiles will be on RAID 5 and Redo Logs are on RAID 10?

Please suggest...

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Locked on Nov 8 2008

Added on Oct 10 2008

#asm, #automatic-storage-management, #performance-availability

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