Hmm, honestly that seems a little slow...
I see 4-6Mb/sec sustained with peaks as high as 10Mb/sec on my DLT7000,
2-way multiplexing.  My activity monitor display shows fulls typically
have a backup data rate of 3-5Mb/sec overall for file systems and
10MB/sec for Exchange system backups.

It's on a single-ended SCSI.

My server is a Sun E4500. 

I'd be curious to test read performance from the disks you're backing up

Terry
-----Original Message-----
From: Elrick, Sandy [mailto:Sandy.Elrick AT cdcgy DOT com]
Sent: Thursday, October 18, 2001 11:44 AM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] RE: Veritas-bu digest, Vol 1 #736 - 11 msgs



Hi Benr,

It seems like you are getting average speed.  At best I can get 10.5
GB/hour
(1750kb/s) on my systems.  This is the max capacity I've found of a
DLT7000
on a standard SCSI interface.  Is the DLT7000 on SCSI interface?

Sandy

Message: 8
From: benr AT cuddletech DOT com
Date: Wed, 17 Oct 2001 16:34:51 -0700 (PDT)
To: <Veritas-bu AT mailman.eng.auburn DOT edu>
Subject: [Veritas-bu] DLT7000 Speed

Any thoughts on this?  I'm doing some big backups to a DLT7000 (via a
ADIC
Scalar 2x tape robot).  My backup is 400G and running on a single drive.
It's currently averaging 1500k/s.  The problem with this speed is that
comes
out to 5.4G/hr.  Isn't that alittle slow?  Can NetBackup throttle drives
and
thus slow down my backup this way?  Or is there something I can look to
change?  The disk system on the system (this is a local backup) isn't
really
being taxed, and it's a Fibre Channel disk system with striped volumes.
The system is a Sun Enterprise 4500 running Solaris 2.6 with NetBackup
3.2.

Thanx

benr.

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