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Rob,

I found some verbiage from the disk management manual which states that you need one hot spare per IOA.
But depending on how you start the hot spare, the system will create 2.

I used the option
3. Start device parity protection - RAID 5 with hot spare

What I think I needed to do is:
1. Start device parity protection - RAID 5, omitting 1 disk unit.
Then
2. Start Hot Spare

Paul


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob Berendt
Sent: Friday, December 14, 2018 7:46 AM
To: Midrange Systems Technical Discussion
Subject: Re: P9 with dual EJ14 - Raid5 and Hot Spare questions

A hot spare is only good for one raid group. Among your choices are:
1 - no hot spares
2 - two raid sets with one hot spare each.
3 - one raid set with one hot spare
4 - two raid sets. One with a hot spare, one without. The hot spare is
not shared between the two.
There are more options. Like two hot spares per raid set. When creating
a secondary asp, composed of SSD's being self maintained, I did this.


Rob Berendt

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