I also saw the tech note that indicated stepping down the 29160 from 160 to 80 
may help, it didn't.

I haven't tried NTBACKUP, never used it before.  Does it show the device speed?

I've had the drive tested by the tech's and also downloaded a utility from the 
HP site for testing.  The drive seams to be fine.

I've backed up large files (1GB) from 3 different local devices.  The target 
session for the drive is 6, the client is set to 8.  The server is set to 16.  
I've had several sessions going to the device at once.


"Day, David" <david.day AT CENTERPULSE DOT COM> wrote:
Have you tried any native backups to compare speed? I use the same drives
on a Solaris system and get slower than expected results but still 8-18gb/s.
My drives are HVDS and so are a bit slower than LVDS. Early on I had to
make changes to a config file (st.conf) to help performance with Legato
while TAR backed up at a normal rate without the changes.

Are there any hotfixes related to your hardware? Can you tell what the sync
rate is on your 39160? I had to step down a 29160 to help with a DLT8000 on
a W2K box.

Using local data for testing is a great idea. Takes any transitory network
latency out of the formula. I have some W2K clients that give me 2-3mb/s on
a good day while most W2K hosts can generate at least 8mb/s.

I've not looked on a Windows server. Can you play with blocks or buffers in
that environment? Do you have any SNMP tools for the drive to check for
errors or problems? I get some info through a controller on my Galactica
library and find that information sometimes helpful.

David

-----Original Message-----
From: Mark Davis [mailto:rikk0088 AT YAHOO DOT COM]
Sent: Wednesday, May 21, 2003 2:25 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] LTO speed is slow

Can't get my HP Ultrium drive to backup any faster then 1.2MB-sec. I've
update the firmware and drivers for the drive and SCSI controller (39160).
I'm backing up multiple streams from the local server and a couple of
clients with a Gig NIC set to GB Full duplex. Have tried just backing up
data from the local system from two drives and a RAID system.

I even used bigasm (described in the NW tuning guide).

O/S is WIN2K-sp3
NetWorker 6.2.
2-1.4GHZ CPU's
2GB mem

Any idea's ????

Mark

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