Arcserve 11.5 Low Througput with Hp Ultrium 960

[michielpeeters]

Professionals,

Question, does anybody have experience with Arcserve 11.5 in combination with a Hp Ultrium 960.

Situation:
I have installed Arcserver 11.5 (same build versions) on two servers (2003).
Both servers have a Hp Ultrium 960 installed on a dual channel ultra320 scsi host bus adapter (adviced by HP).


Problem:
Server1 has a average throughput of 1150Mb per minut.
Server2 has only 400Mb per minut.
The compare jopb on server2 gets a throuput of only 200mb per minut.

I tested the drive with HP StorageWorks Library and Tape Tools, no problems found, performance is ok. So it has to be Arcserve.

I already defrag the disks of server2 and disbaled the virusscanner with no results.

Does anyone have a suguestion?

 

[ortica104]

Have You disable to Windows driver and removable storage on second server ?? Probably You have scsi problem , please try to add tape trace on , and review the log file probably You find it the error message .

 

[vschumpy]

A bit of an unfair assumption that the problem is ARCserve.

Are the servers identical.... in every way?

How does the file structure/composition differ between the two servers?

You say you have tried disabling AV, but have you really completely disabled, and by that I mean disabling the system level drivers at boot time, not just disabling the realtime monitor.

Last time I saw something of this nature it was exact that, the system level drivers for the AV.

Does the server have RAID, if so, how is the read/write cache proportioned?

 

[davidmichel]

Not sure I understand.

Did you backup the same data with HP StorageWorks Library and Tape Tools as was done by ARCserve?

If all that was done was to test the library then all you know is there is not a hardware failure.

Different servers some times have different data, and different data can take different lengths of time to backup. Lots of large text files backup at a screaming rate. Lots of small compressed files like jpg, mp3, can seem to crawl.

Long ago we setup two systems, same hardware, same OS install, same data. Throughput differed by 10%.