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тАО03-01-2007 06:48 AM
тАО03-01-2007 06:48 AM
MSL6030 hardware compression diable
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тАО03-01-2007 07:52 AM
тАО03-01-2007 07:52 AM
Re: MSL6030 hardware compression diable
are you refering to hardware compression ?
how does your customer decide that the comression is not working ?
can you provide more details ?
If so, according to HP it is on by default.
the way to test it would be to use the compression test on the drive using the ltt tool.
Tal
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тАО03-01-2007 07:54 AM
тАО03-01-2007 07:54 AM
Re: MSL6030 hardware compression diable
Tal
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тАО03-01-2007 08:05 AM
тАО03-01-2007 08:05 AM
Re: MSL6030 hardware compression diable
"HP MSL6030 LTO3 tape library: The hardware compression is disabled when it's connected to the switch. Need to find a way on how to enable it. The HP LTO2 does not exhibit this problem. The receiving buffer size is set to 1K. We found out that the other HP LTO2 is set to 2k so there should be a way to correct this."
I'll find out how they are determining that the hardware compression is becoming disabled and is they are logging in through the web browser and reply ASAP.
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тАО03-02-2007 03:07 AM
тАО03-02-2007 03:07 AM
Re: MSL6030 hardware compression diable
Only thing is, if it's connected straight to the HBA, compression works. It's when they connect to the switch when the problem occurs. And it's only with the LOT3 not the LTO2.....
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тАО03-02-2007 03:25 AM
тАО03-02-2007 03:25 AM
Re: MSL6030 hardware compression diable
There is a test on L&TT to enable hardware compresion.
Configuration test with "enable compression option"
Another way is rebooting your library, it will enable hardware compression.
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тАО03-02-2007 05:26 AM
тАО03-02-2007 05:26 AM
Re: MSL6030 hardware compression diable
This is what I just received from customer.
"Just found out that software compression is off by default. If the HP library is connected directly to the host, the hardware compression is ON but if the library is connected to the FC switch, the hardware compression is OFF. For some reason, the HP detects something to auto-configured the hardware compression."
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тАО03-02-2007 06:31 AM
тАО03-02-2007 06:31 AM
Re: MSL6030 hardware compression diable
Software compression needs to be disabled from your backup software, is not recommended to use both at the same time.
Software compression takes more resources from your system.
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=lpg50244