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тАО12-04-2002 02:12 PM
тАО12-04-2002 02:12 PM
I am confused. When I do a full backup, it requires 2 tapes - even though each tape has the compressed capacity of 5GB! The log says the uncompressed data was 4081GB and the compressed data was 3113GB. Why won't it fit on one tape? The Tools say the capacity is 2578GB. Perhaps this is the uncompressed capacity. Please help me. Is their anything I can do to get my backup on one tape?
Retired, but still learning...
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2 REPLIES 2
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тАО12-04-2002 03:17 PM
тАО12-04-2002 03:17 PM
Solution
Dale-
The actual capacity of one tape is 2.5GB. Thus, if you can get a 2:1 compression ratio, you can fit 5GB on one tape.
It sounds like your 4.081GB of data compresses down to 3.113GB and thus still exceeds the storage capacity of one tape.
Most "data" compresses at about that 2:1 ratio. However, if your data contains a lot of compressed files (e.g., zip files, mp3, etc.), then you will not be able to obtain a compression ratio anywhere near 2:1.
Tim
The actual capacity of one tape is 2.5GB. Thus, if you can get a 2:1 compression ratio, you can fit 5GB on one tape.
It sounds like your 4.081GB of data compresses down to 3.113GB and thus still exceeds the storage capacity of one tape.
Most "data" compresses at about that 2:1 ratio. However, if your data contains a lot of compressed files (e.g., zip files, mp3, etc.), then you will not be able to obtain a compression ratio anywhere near 2:1.
Tim
If it works, don't fix it!
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тАО12-04-2002 04:40 PM
тАО12-04-2002 04:40 PM
Re: HP Colorado 5GBe Tape Capacity
Thank you, Tim. I was afraid this was the answer. Oh, well, I'll buy more tapes!
Retired, but still learning...
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