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02-23-2005 05:17 AM
02-23-2005 05:17 AM
HP LTO Ultrium-2 drive compression
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02-23-2005 06:53 AM
02-23-2005 06:53 AM
Re: HP LTO Ultrium-2 drive compression
Which backup software are you using, hardware compression on Windows is controlled by (and configured) the application.
Are you using LTO1 or LTO2 medias, as LTO2 medias has a native (uncompressed) capacity of 200GB it seems most likley that you use LTO1 media.
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02-23-2005 06:56 AM
02-23-2005 06:56 AM
Re: HP LTO Ultrium-2 drive compression
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02-23-2005 07:40 AM
02-23-2005 07:40 AM
Re: HP LTO Ultrium-2 drive compression
Hi,
Unfoutunatly I have no experience with Netbackup but I belive device configuration is rather similar to other backup program (I use DataProtector).
In DataProtector , hardware compression is controlled by the media agent, when configuring a (Windows) backup device you have an option to select hardware compression or not. With hardware compression enabled the device adress end with an "C" (e.g. scsi3:1:0:2C). With compression disabled, adress ends with "N".
Software compression is handled by the disk agent and is selected when configuring a backup job.
Is there any compression option in NetBackup when configuring a backup device and how does the adress for the device looks like ?
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02-24-2005 04:46 AM
02-24-2005 04:46 AM
Re: HP LTO Ultrium-2 drive compression
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02-24-2005 07:02 AM
02-24-2005 07:02 AM
Re: HP LTO Ultrium-2 drive compression
No, not Unix. In Unix, hardware compression is controlled by the devicefile. Compressed or not compressed uses different devicefiles.
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02-24-2005 07:12 AM
02-24-2005 07:12 AM
Re: HP LTO Ultrium-2 drive compression
Anyway...extra info, i have a similar setup at another facility, and that one is compressing just fine. Software setup is exactly the same. But on this other server (2003) when i look at the device in device manager, there is extra tabs that don't show on the 2000 server. The extra tabs state compression is on and enabled. I don't know if those extra tabs are a result of the different OS's or what, since they are both using the exact same driver. Are there any windows command line options to directly query the tape drive for information?
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04-28-2005 06:00 AM
04-28-2005 06:00 AM
Re: HP LTO Ultrium-2 drive compression
Lto2 stk Ultrium-2 hp-ux using veritas does not compress but the windows machines do.
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04-28-2005 06:14 AM
04-28-2005 06:14 AM
Re: HP LTO Ultrium-2 drive compression
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04-28-2005 06:16 AM
04-28-2005 06:16 AM
Re: HP LTO Ultrium-2 drive compression
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