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тАО09-01-2004 08:06 PM
тАО09-01-2004 08:06 PM
Ultrium(LTO) generation 2 ...wat a display!!!
Hello Gurus,
We are using LTO ultrium (generation 2) tapes.
We have installed HP's data protector (cell manager) s/w .
Being generation 2,it should go uncompressed upto 200 GB(green marking) & above it ,it should start compressing data(red marking).
but,as soon as data reaches 100GB ,it starts showing red marking when checked for usage.
Is it correct?
thanks & advance
abhik
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тАО09-01-2004 08:14 PM
тАО09-01-2004 08:14 PM
Re: Ultrium(LTO) generation 2 ...wat a display!!!
The default size for an Ultrium tape when you format it into DP is 100 GB.
However, DP will use the tape untill the end-of-tape is reached and the size during the format doesn't matter. If you set a size of 1 MB or 1 TB, you still will be writing +- 400 GB of compressed data on the tape (asuming you are using hardware compression).
Else you should reformat the tape and specify a size of 409600 MB. DP will reflect now the correct settings.
The default size can be changed in the global optinos (etc/opt/omni/options/global) file.
best regards,
Kurt
best regards,
Kurt
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тАО09-01-2004 08:15 PM
тАО09-01-2004 08:15 PM
Re: Ultrium(LTO) generation 2 ...wat a display!!!
This doesn't matter. Eventually DP continues writing to the tape. We have the same issue, I don't have any good explanation for this. All I know is that DP continues to write even if it says the tape is full(100GB).
I believe there is coming a DP5.5 version soon, maybe it is fixed there.
MB.
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тАО09-01-2004 11:16 PM
тАО09-01-2004 11:16 PM
Re: Ultrium(LTO) generation 2 ...wat a display!!!
The "problem" is that there is only one LTO media type in DP, the 100GB (default) size apply to all LTO medias.
As stated out before, this size is for information only, DP alwaus uses the full media caspacity.
It is possible to change the default size in the global option file.
I don't belive there will be any differences in DP 5.5 .
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тАО09-03-2004 05:55 AM
тАО09-03-2004 05:55 AM
Re: Ultrium(LTO) generation 2 ...wat a display!!!
Keep in mind that DP is only writing 200GB of information on an LTO2 tape as that's all it can hold. But since the source data is being compressed as it's written, the size of the source data may be much larger than 200GB.
Regards,
Seth