I think some of the high performance Dual Raid controllers make 2 drives hot spares.


Pete Massiello
iTech Solutions

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Monday, April 28, 2014 6:46 AM
To: midrange-l@xxxxxxxxxxxx
Subject: 20 drives, raid 5 with hot spare, puts two drives in hot spare

I thought raid 5 with hot spare only put one drive as a hot spare.

Display Hot Spare Disk Unit Status

Serial Resource
Description Number Type Model Name Capacity Status
Storage IOA YL1BJH43M022 57CE 001 DC02
Disk Unit Y210S0K1X6H1 19B7 051 DMP001 283794 Active
Disk Unit Y210S0K1X61N 19B7 051 DMP003 283794 Active

Of course, when I added these drives to the raid set I probably should have broken them into two sets. I forgot that 18 is the maximum number of drives you can have in a raid set. An email on the midrange-l list last night reminded me.
But, if I had done so, would that have tied up four drives for hot spare?

Display Device Parity Status

Parity Resource Hot Spare
Set ASP Unit Type Model Name Status Protection
1 57CE 001 DC02 RAID 5 Y

Rob Berendt
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755

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