Don't forget that the v880 has three PCI buses, so you'll find some
limitations there. Based on a 70% efficiency rate, that equals
744MB/second. The specs that Conrad notes are within that (10 LTO-1 or 7
LTO-2), of course, that keep in mind that the number of slots doesn't
always equal the number of buses...

Dave


Date: Wed, 3 Dec 2003 07:35:09 -0500
From: Conrad Macina <conrad.macina AT PFIZER DOT COM>
Subject: Re: Advice on a specs for a Sun

Hi,

If you're going to stay with your current Master Server / Storage Node
configuration, I agree 100% that a v480 with 2 CPUs @ 900 MHz would be an
excellent choice, with room to grow should your needs change.

If you want to consolidate everything into one Master Server on a v880, you
may find a limitation in the backplane. The v880 has only two 66 MHz PCI
slots, and seven at 33 MHz. While that should be perfectly adequate for
your current configuration, you may find it limits your throughput as you
upgrade to more higher-speed tape drives. Our engineers recommend limiting
a v880 to ten LTO-1 drives or seven LTO-2's. In any event, you'd want to
pay attention to what drives go to which card, so your fastest drives use
the fastest slots.

Conrad Macina
Pfizer, Inc.


===================================
David Gold
Sr. Technical Consultant
Cambridge Computer Services, Inc.
Artists in Data Storage
Tel: 781-250-3000
Tel (Direct): 781-250-3260
Fax: 781-250-3360
dave AT cambridgecomputer DOT com
www.cambridgecomputer.com

===================================
 ----------------------------------------------------------------------------
*Any ideas, suggestion or comments are mine alone, and are not of my company*

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