Hello,
What might be your concern regarding throughput or scsi id contention ? or 
is it HBA performance ?  We have been running atleast 4 drive\HBA  over 2 
Gb FC
 ( LTO2) without any issues for long time. Unless your backups are mostly 
over the SAN, i doubt that you could utilize the full drive potential with 
ethernet.
Which hardware  ( servers) are out there which you would recommend & will  
support   20+ HBA to allow one Drive per card ? which is what we have 
running between Physical Tape Lib ( Adic i2K & Netapp VTL).
Thanks



Davina Treiber <Davina.Treiber AT PEEVRO.CO DOT UK> 
Sent by: EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
10/05/2007 02:09 PM
Please respond to
EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>; Please respond 
to
Davina Treiber <Davina.Treiber AT PEEVRO.CO DOT UK>


To
NETWORKER AT LISTSERV.TEMPLE DOT EDU
cc

Subject
Re: [Networker] Adequate server hardware to feed 3-4  LTO3 drives






Fazil Saiyed wrote:

>  2.Should I have each LTO3 on a separate fiber card?
> Depends on which fiber card you use, if you use 4 GB capable 
card\switch, 
> you should be able to run 4-6 drives easily per card.

Does a 4 GB switch exist? Perhaps a 4Gb switch might be more realistic?

I really wouldn't put 4-6 drives on one connection. I wouldn't put more
than two, perhaps even only one.

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type 
"signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER


To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER