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тАО06-29-2007 08:11 PM
тАО06-29-2007 08:11 PM
Performance issue
Hi, Team
I have a 6060 Library with two lto3 drive. It's default block size 32kbps, can i change it with 64kbps. If yes, then tell me how can i do it.
Nots:- All the driver & firmware is updated.
thanks & regards
rakesh kumar
I have a 6060 Library with two lto3 drive. It's default block size 32kbps, can i change it with 64kbps. If yes, then tell me how can i do it.
Nots:- All the driver & firmware is updated.
thanks & regards
rakesh kumar
3 REPLIES 3
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тАО06-30-2007 01:03 AM
тАО06-30-2007 01:03 AM
Re: Performance issue
Hello Rakesh,
which backupsoftware do you use? You can change the block size in the configuration of you backup software. If you're using Data Protector, take a look under "Devices und Media" in the advanced options of the tape drivces. For LTO drives you should use a block size of 256 KB.
Best regards,
Patrick
which backupsoftware do you use? You can change the block size in the configuration of you backup software. If you're using Data Protector, take a look under "Devices und Media" in the advanced options of the tape drivces. For LTO drives you should use a block size of 256 KB.
Best regards,
Patrick
Best regards,
Patrick
Patrick
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тАО06-30-2007 12:54 PM
тАО06-30-2007 12:54 PM
Re: Performance issue
Maximum block size depends also on the operating system I/O subsystem and driver.
On HP-UX and generally speaking on Unix you can use 256KB, it works with good performance.
On Windows you can have troubles setting more than 64KB, sometimes you need to change
MaximumSGList registry key which only applies to SCSIPORT drivers. If your HBA is using STORPORT drivers you don't have to mind about maximumsglist. BUT if you have Win2003 SP1 and STORPORT you need a hotfix for tape.sys from Microsoft to allow windows tape.sys to write larger i/o than 64KB.
Be careful not to mix different settings for the same drive on different systems... you have to format the tape to change the blocksize
Best regards, Alessandro Bocchino
http://www.risolve.com
We work in the dark, we do what we can, we give what we have, our doubt is our passion, and our passion is our task - the rest, is the madness of art - Henry James
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тАО06-30-2007 09:33 PM
тАО06-30-2007 09:33 PM
Re: Performance issue
Hello,
thanks for that additional information. The tape.sys fix is described in KB916048.
http://support.microsoft.com/kb/916048/en-us
Best regards,
Patrick
thanks for that additional information. The tape.sys fix is described in KB916048.
http://support.microsoft.com/kb/916048/en-us
Best regards,
Patrick
Best regards,
Patrick
Patrick
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