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How do you make a copy of an LTO tape?

Posted on 2013-07-01
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Last Modified: 2013-07-01
I need to make exact copies of some LTO 4 tapes, but I'm not sure how to do this.

Here is some info regarding my system:
OS = RHEL 6.2
3GHz Quad Core Processor
8GB Memory
One External SAS LTO 5 tape drive

Should I backup from the source tape to a tar file on the hard drive, install blank tape and then extract the tar file to the blank tape? What is the best method?
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Question by:Mccalma1
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David earned 500 total points
ID: 39291222
It depends on how the tape was created.   You have to worry about blocking factor and tape markers.

example, they could have done a dd if=nameoftarfile  of=/dev/rmt  bs=10k  to force a blocking factor.   Or the tape could have been built with dd and cpio, or neither.

It is semantics, but you don't want a copy of the tape as much as a copy of the usable data.

So if it was me, I would use whatever utility you used to create the tape to extract it into a scratch directory, then build a new tape using that same software and the scratch directory full of data as the source.

Make sure that when you extract the data you don't overwrite anything ;)
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by:Mccalma1
ID: 39291260
Thanks!
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