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Top Forums UNIX for Dummies Questions & Answers How to check hardware data compression Post 302470144 by rab on Tuesday 9th of November 2010 09:52:39 AM
Old 11-09-2010
I found the reason for the backup sizes changing, was due to /proc - but still trying to find out what compression is being applied, and if we apply it at all. It seems like it is applied (2:1), but I want to make 100% sure because we are going to be backing up more to one tape and I need to make sure we don't try to backup more than what we have space on the tape for.

Any ideas?

Cheers,
Rab
 

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AMVERIFY(8)						      System Manager's Manual						       AMVERIFY(8)

NAME
amverify - check an Amanda tape for errors SYNOPSIS
amverify config [ slot [ runtapes ] ] DESCRIPTION
Amverify reads an Amanda format tape and makes sure each backup image can be processed by amrestore and, if possible, the appropriate restore program (e.g. tar). Amverify runs amrestore on each file of the tape and pipes the output to a restore program (if available) with an option to create a cata- logue of the backup. The catalogue itself is discarded. Only the success or failure of the operation itself is reported. If the backup image cannot be processed by the restore program, e.g. if it was written on a different operating system, the image is sent through dd to /dev/null. This still determines if the tape is readable, but does not do any internal consistency check on the image. If config is set up to use a tape changer, the slot argument may be used to choose the first tape to process. Otherwise, the current slot is used. The runtapes configuration parameter determines how many tapes are processed unless it is specified on the command line. See the amanda(8) man page for more details about Amanda. AUTHOR
Axel Zinser <fifi@icem.de> SEE ALSO
amrestore(8), amanda(8), amverifyrun(8) AMVERIFY(8)
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