Backup Size
Jay Hall
jhall at socket.net
Mon Aug 10 15:22:01 UTC 2009
I am sure there is an easy explanation for this, but I cannot find it.
I am backing up my /etc directory using the following command.
tar -cvf - /etc | dd of=/dev/nsa1 obs=10240
When the command completes, I receive the following message.
3080+0 records in
154+0 records out
1576960 bytes transferred in 0.179921 secs (8764740 bytes/sec)
What concerns me is when running du -h /etc, the size of the folder is
reported as 1.7M.
Is the number of bytes written to the tape less than the reported size
of the directory because of the way the files are written to the
tape? If so, how can the amount of space used be calculated?
Thanks for your help.
Jay
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