RE: No performance increase from 3590 B11 to 3590 E11

Charly, thanks for responding. Just saw your note, but the 3590 is the only
drive on that bus. It's not sharing any disk drives. Thanks.


Paul Talbert
Integrated Solutions & Services, Inc.
(908)534-7831 ext 25
email: ptalbert@iss2000.com


-----Original Message-----
From: Charly Jones [mailto:charly301@hotmail.com]
Sent: Thursday, February 01, 2001 12:23 PM
To: MIDRANGE-L@midrange.com
Subject: Re: No performance increase from 3590 B11 to 3590 E11


Paul,

The system bus that your 6534 SCSI card is attached to can be a
performance bottleneck.  What else is attached on that bus?
If some of the disk drives that are being backed up
are using up the bus bandwidth you won't get full rated speed
on the SCSI card.

I know a shop that has four 3590 drives that they like to keep
busy during their nightly backup.  Each SCSI card that drives
a 3590 is in a separate tower, on a separate bus.  No disk drives
or anything else in four towers.  Their backup performance
numbers would take
your breath away, but they spent some money to maximize their
throughput.

Charly
Geezer in Gig Harbor


>From: "Talbert, Jr., Paul" <PTalbert@iss2000.com>
>Reply-To: MIDRANGE-L@midrange.com
>To: "'MIDRANGE-L@midrange.com'" <MIDRANGE-L@midrange.com>
>CC: "Avedissian, Edward" <EAvedissian@iss2000.com>
>Subject: No performance increase from 3590 B11 to 3590 E11
>Date: Thu, 1 Feb 2001 10:07:57 -0500
>
>I currently have a model 730 running V4R4 and have currently upgraded from
>a
>3590 B11 to a 3590 E11. The drive is attached to a 6534 SCSI SPD card.  I'm
>not seeing the promised 50% increase on my full system backups. The backups
>have run for 10 hours on both the B11 and E11.  IBM states that the E11 has
>a faster data transfer rate of 14mbs vs 9mbs for the B11.  Has anyone
>experienced this problem? Any suggestions?  Thanks
>
>Paul Talbert
>Integrated Solutions & Services, Inc.
>(908)534-7831 ext 25
>email: ptalbert@iss2000.com
>
>+---