I need help on how to setup hardware raid for ASM.

In the « Recommendations for Storage Preparation” section in the following documentation: http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmprepare.htm
It mentions:
--Use the storage array hardware RAID 1 mirroring protection when possible to reduce the mirroring overhead on the server.
Which is a good raid 1 configuration considering my machine setup?
“I put my Machine info below.”
Should I go for something like:
5 * raid 1 of 2 disks in each raid: disk group DATA
5 * raid 1 of 2 disks in each raid: disk group FRA
Then ASM will take care of all the striping between the 5 raids inside a disk group right?
OR, I go for:
1 * raid 1 of 10 disks: disk group DATA
1 * raid 1 of 10 disks: disk group FRA
In the second configuration, does ASM recognize that there are 10 disks in my raid configuration and stripes on those disks? Or to use ASM striping, I need to have lots of raid in a disks group?
Here is my Machine Characteristics:
O/s is Oracle Enterprise Linux 4.5 64 bit
Single instance on Enterprise Edition 10g r2
200 GIG database size.
High "oltp" environment.
Estimated growth of 60 to 80GIG per year
50-70GIG archivelogs generation per Day
Flashback time is 24 hours: 120GIG of flashback space in avg
I keep a Local backup. Then push to another disk storage, then on tape.
General Hardware Info:
Dell PowerEdge 2950
16 GIG RAM
2 * 64 bit dual core CPU's
6 * local 300G/15rpm disks
Additional Storage:
Dell PowerVault MD1000
15 * 300G/15rpm Disks
So I have 21 Disks in total.

I would personally prefer the first configuration and let ASM stripe the disks. Generally speaking, many RAID controllers will stripe then mirror (0+1) when you tell it to build a striped and mirrored RAID set on 10 disks. Some will mirror then stripe (1+0) which is what most people prefer. That's because when a 1+0 configuration has a disk failure, only a single RAID 1 set needs to be resync'd. The other members of the stripe won't have to be resynchronized.
So, I'd prefer to have ASM manage 5 luns and let ASM stripe across those 5 luns in each disk group. It also increases your ability to reorganize your storage if you need 20% more info in DATA and can afford 20% less in FRA, you can move one of your RAID 1 luns from FRA to DATA easily.
That's my 0.02.

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