Tape capacity difference
Updated: 24 Jan 2012 | 6 comments
This issue has been solved. See solution.
Hi, I have a question. My question is from attached screenshot:
All tapes are same tapes and we have only one tape drive but they are becoming full in different size. One is 522778560, another one is 863286528 and third one is even more 1567017472. Why they are becoming full in different points?
Sorry if this question is ever been answered before.
Thanks!
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Different types of data
Different types of data compress differently - some good, giving your more data written on tapes. Some data does not compress well or allow no compression at all, giving you less data on tape.
Always use uncompressed capacity for planning purposes. Anything above that is a bonus!
Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows.
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We are not doing any
We are not doing any compression while doing a backup.
Really?
most people have hardware compression on the tape drives by default.
I don't have to know how to spell....I work on Unix.
NetBackup 7.0.1 - AIX & Windows
How i can find if it is
How i can find if it is exists? How do i know if the compression is enabled in the drive.
and i told that we are not doing compression from NB end.
Compression is built-in
The LTO specification describes a Data Compression method LTO-DC, also called Streaming Lossless Data Compression (SLDC).
http://en.wikipedia.org/wiki/Linear_Tape-Open#Compression
good Will backing-up
Thanks so much for all. My
Thanks so much for all. My question has been answered and i am marking Mariannes answer as a solution.
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