RE: Disk addition and LTO1 backups

Thanks everyone for the help. It looks like this was a matter of
coincidence. A cleanup job for objects in the IFS had stopped running
around the same time we install the disks. PRTDSKINF wasn't any help
finding it. We just happened upon it last week. The backup is now 45
minutes longer that before adding the disk. That's acceptable.

Andrew Goade
Manager, IT Production Services
Hub Group Inc.
3050 Highland Parkway, Suite 100
Downers Grove, IL 60515
Email: agoade@xxxxxxxxxxxx
Office: (630)795-2352
Fax: (630)271-3647



"Pete Massiello" <pmassiello-ml@xxxxxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
01/24/2008 06:38 PM
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>


To
"'Midrange Systems Technical Discussion'" <midrange-l@xxxxxxxxxxxx>
cc

Subject
RE: Disk addition and LTO1 backups






LTO1 and Fibre. These drives work great on Large objects (like DB files),
but if you have a lot of small objects, you will not get as great
performance. In addition, the LTO-1 is a slow tape drive compared to the
new LTO3/LTO4 drives, and I bet since you are an LTO1 tape drive, you also
have the older fibre controller. You might want to look into the new
controllers and see how much more data you can push through to the tape
device.

Pete

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of jvoris@xxxxxxxxxxx
Sent: Thursday, January 24, 2008 1:02 PM
To: midrange-l
Subject: Disk addition and LTO1 backups

I have a similar setup LTO1 on Fibre, no LPAR,
but when reviewing the SAVSYS I have problems with the /QNTC trying to
touch other hosts in the network, and this lengthens my backup horribly.

Look at the joblog. Suspect some other factor is causing the problem.

============================================

message: 7
date: Thu, 24 Jan 2008 08:47:37 -0600
from: Andrew Goade <agoade@xxxxxxxxxxxx>
subject: Disk addition and LTO1 backups

We have an LPAR on an i570 that had a little over 1TB of disk space and
backed up, using BRMS over fiber, to dual LTO1 drives. The backup time
was approximately 3.5 hours give or take depending on the usage of the
system. A while back we added 400GB of disk to the LPAR that is now at
approx. 1.4TB. With similar disk usage to before (not percentage, but GB
used), our backups are now taking over 6 hours. Has anyone ever
experienced this or have an explanation?
=========================