making compressed backups
Leo Pinard
aai!leo at uunet.uu.net
Thu Feb 1 15:28:00 AEST 1990
In article <1990Jan12.092215.1567 at aai.uu.net> I write:
>
>What is the best way to make compressed backups? I have been trying
>things like:
>
>find /usr -depth -print | cpio -oBmc | compress | dd of=/dev/rmt8
>
>but I've been having problems with segmentation faults and core dumps.
>Another problem with this method is that everything must fit on one
>tape. Is there another or better way to do this?
I have done some experimenting and it is cpio that is dumping core. This
happens at the same place in my test files on both our Sun 3 and Sun 4
running 4.0.3 when listing the files in the archive using
cpio -itvc <archive # archive is ~20MB in this test
After listing about 670 files containing about 6.7MB I get a segmentation
fault/core dump.
Am I doing something wrong here or is there a problem with Sun cpio and/or
OS? Isn't this the kind of thing people need to do with cpio all the
time?
I received no suggestions from anyone about how multi-volume compressed
backups could be done. Is it not possible without having sufficient disk
space to store the intermediate file?
Thanks!
Leo leo at aai.uu.net uunet!aai!leo
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