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Slow Backups on SAS Tape Autoloader

Bhargava
Advisor

Slow Backups on SAS Tape Autoloader

I have just purchased an LTO4 Autoloader (SAS) and using backup exec 10d. When I do a backup I get throughput of only 967 MB/Min. Is this normal or should I expect More? As far as I know the drives are capable of backing up @ 80 MB/s.

This is what my architecture is: there are 6 servers and 4 PC's that I am backing up and they are connected to a backup server through LAN (10/100).

Thanks
Rajat
5 REPLIES
Mark Matthews
Respected Contributor

Re: Slow Backups on SAS Tape Autoloader

Are you using Veritas / Symantec drivers instead of HP ones?
Ive found the best performance using Veritas drivers.

Also stop and disable the Removable Storage Service in Windows.

I have a customer with an LTO3 autoloader with 10d that gets upto 2GB/Min throughput so you can do better...

Mark...

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TapeDrive Killer
Trusted Contributor

Re: Slow Backups on SAS Tape Autoloader

Ultrium 1760 = 160MB/s
Ultrium 1840 = 240MB/s

I have never seen this performace live the bottle neck is always the server here is a link for performance.

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=lpg50460

Also you can attacht a support ticket.

Pablo Alvarado Siles
One drink away from sleeping on the pavement
Bhargava
Advisor

Re: Slow Backups on SAS Tape Autoloader

@ Mark...
I have RSM disabled and I did a LTT performance test and I got a throughput of almost 73MB/s. Here is how I back up...
Once production finishes I start back up using backup exec. It pulls data through LAN and then sends it to the autoloader...

@TapeDrive killer

I am attaching a ticket here...
TapeDrive Killer
Trusted Contributor

Re: Slow Backups on SAS Tape Autoloader

Run a LTO drive assesment test to test this hardware.

Pablo Alvarado Siles
One drink away from sleeping on the pavement
Bhargava
Advisor

Re: Slow Backups on SAS Tape Autoloader

Pablo...
Drive is able to read and write... Plus the Performance test is good... The Drive by all means looks good to me...

Rajat