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Date: Thu, 19 Feb 2009 16:14:03 -0800
From: Andrew Sharp <andy.sharp@onstor.com>
To: Patrick Haverty <patrick.haverty@onstor.com>
Cc: dl-Leopard <dl-Leopard@onstor.com>
Subject: Re: MD1000, PERC5 and The LSI HBA
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On Thu, 19 Feb 2009 13:40:56 -0800 Patrick Haverty
<patrick.haverty@onstor.com> wrote:

OK, I'm going to show my ignorance here and ask the questions that
apparently only I'm wondering about.

What is a PERC5 card?  What is an EMM?

> The PERC5 card, from the BIOS level, can only see the disks in the
> MD1000 from the primary EMM.  The Leopard system can only see Virtual
> Devices presented from the PERC5 and otherwise cannot see the
> MD1000.  To use the PERC5 card the disks would have to be configured
> in its BIOS into RAID groups, meaning to see the individual disks
> they would be presented as individual virtual devices from individual
> RAID0 groups. (Can a singular entity really be considered a group?).

Of course.  A group can have zero entities or members.

> There is no visibility to the disks, through the secondary EMM, when
> using the PERC5.
> 
> The Leopard, when using the LSI HBA to connect to the MD1000, can see
> all of the disks through either of the EMMs when the MD1000 is set in
> unified mode.

An LSI and see an EMM?

Confused in Campbell,

a
