I've been doing research on this recently and the figures I most commonly
have heard from HP and EMC are around 50 GB for performance. More if youre
application is not i/o intensive.
Carl McNamee
Systems Administrator
Billing Concepts
-----Original Message-----
From: Costantino, Rocky [mailto:[log in to unmask]]
Sent: Monday, May 15, 2000 10:00 AM
To: [log in to unmask]
Subject: Re: 12H Array
Kevin,
I tend to agree, however, the AutoRAID does not work like JBOD, so it really
isn't 12 "drives" on one channel. The AutoRAID suppports up to 8 LUNs,
therefore, 8 LDEVs, per AutoRAID. So the channel would "see" 8 devices. The
AutoRAID also has a cache, albeit small, and the technology to keep the most
frequently accessed data in a RAID 0/1 space.
A question that I have for the group/HP is "what is the maximum amount of
storage (GB) that is recommended on one fast-wide interface?". The "8-10
drives per FWD channel" has been a rule of thumb, but with 18GB drives and
the AutoRAID, you can be looking at 140-180GB per channel!!!
Regards,
> _________________________________________
>
> Rocky J. Costantino
> Vice President
>
> Computer Design & Integration, LLC
> 696 Route 46 West
> Teterboro, NJ 07608
>
> * e-mail [log in to unmask]
> * Web http://www.cdillc.com
> * Phone (201) 931-1420 x224
> * Fax (201) 931-0101
>
>
-----Original Message-----
From: Kevin Newman [mailto:[log in to unmask]]
Sent: Monday, May 15, 2000 10:47 AM
To: Costantino, Rocky
Cc: [log in to unmask]
Subject: Re: 12H Array
I would wonder about that, how can 12 SCSI drives not saturate a FW SCSI
interface?
Kevin
"Costantino, Rocky" wrote:
> This means all I/O through
> one (fast-wide)channel. Not knowing the nature of your app, this may or
may
> not, be reason for concern. I have been told by certain HP folks that the
> disks will be the bottleneck before the channel becomes an issue, even on
a
> fully loaded AutoRAID...
>
> Regards,
>
> > _________________________________________
> >
> > Rocky J. Costantino
> > Vice President
> >
> > Computer Design & Integration, LLC
> > 696 Route 46 West
> > Teterboro, NJ 07608
> >
> > * e-mail [log in to unmask]
> > * Web http://www.cdillc.com
> > * Phone (201) 931-1420 x224
> > * Fax (201) 931-0101
> >
> >
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