md3000 performance issues

Barry Allard ballard at stanford.edu
Tue Jun 5 13:03:00 CDT 2007


Hi Folks,

I heard 2nd-hand from the software developers that the 2 TB limit is a
limitation of the md3000 management software for windows reasons, not the
md3000 itself.

Regards,
Barry Allard



-----Original Message-----
From: Kilian CAVALOTTI [mailto:kilian at stanford.edu] 
Sent: Monday, June 04, 2007 5:57 PM
To: linux-poweredge at dell.com
Cc: Barry Allard; 'Christopher McCrory'
Subject: Re: md3000 performance issues

Hi all,

On Monday 04 June 2007 04:59:47 pm Barry Allard wrote:
> Hi Christopher,
>
> I asked our ASG engineer about this; he happens to know the lead
> software developer for it.  The switch on the front of the md3000
> apparently does nothing; 

Indeed, that's mentionned in the documentation.

> With active-active 
> controllers, it wouldn't make sense anyhow.  Btw, have you been able
> to get disk groups (LUNs) larger than 2 TB?

That's unlikely:
"""
Enclosure Features 
  Features include: 
  [...] 
  Up to 2 TB (2036 GB) storage on a single virtual disk 
"""
http://support.dell.com/support/edocs/systems/md3000/en/HOM/HTML/about.htm#w
p1091182

Cheers,
-- 
Kilian



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