ASM striping & Failgroups

Question

Hi Gurus,
After Googl-ing also i got only blur image about ASM striping and Fail groups.
Could you please expalin 1.ASM striping Concept,
2.ASM Fail Group Concept. At least guide me through some URL.

Answer 1

udayjampani wrote:
Understand the following scenario and explain me,
I have chosen normal redundancy level and didn't provided any fail group specification .
So I have two disk groups,DATA and FRA , which in turn having four disks, DATA_0000,DATA_0001,FRA_0000,FRA_0001.
1.From the document, DATA_0000,DATA_0001 will be two failure groups automatically.is that right?Yes, both the disks would be in two different fail groups and each one would be owned by one disk.
2.But from striping concept,mirror file will be stored across disks,say for a table some data is stored in one disk,and remaining will be on the other disks.But this scenario will not serve data when there is disk failure right?You are mixing two things. Don't combine striping and mirroring together. You have got two disks over which the mirroring would be done but since you have just two disks, if one is gone, there won't be any other disks available to support the redundancy level of the disk group, loss of one disk would eventually lead to the dismounting of the entire disk group. To confirm this, create a disk group with 3 disks and then lose one of the disks .
Aman....