I've been using sbackup (tar) to do backups for a while, but now that I have
a 1tb drive I want to change to an rsync-based backup scheme.
Also, I recently had a hard drive go bad and I don't know for how long it's
been corrupting files, but there were about 5mb of bad sectors when I
replaced it. Using ddrescue I got the copy on the new drive down to 450k,
but I still want to look through some old backups and see what needs
recovering.
Now I want to progress through my old backups and create two 'views':
1) a change history of the backups over time
the first full backup is loaded into
/backups/CURRENT.d
all incremental backups replace files in current and are copied
will contain the most current copy of the files
rsync \
--archive \
--exclude-from $RSYNC_EXCLUDE \
--delete-excluded \
--backup --backup-dir=../${DATE_OF_LAST}.bak \
${DATE_OF_NEXT}.d CURRENT.d
I'll have some control such that the --delete option is added on full
backups but not on incremental backups
This is very much like leaving them untarred and not touching them at all
with rsync, but there are some differences
(the full (CURRENT) will be the most recent and the incrementals will be
least recent,
also the CURRENT will contain all files changed or added and there will only
be one ful backup rather than periodic ones)
But I'd like it to make *hard-link copies* of the files *rather than
duplicating* that I've untarred.
2) I want to make a copy of the directory structure above, but where
*every backup* is seen as a *full backup*, again using hard links
I don't understand the *rysnc hard-link options* and
I don't think osx's cp has hard-link options at all
I've seen some examples online of using hard links with rsync and cp -al,
but the ones I've seen weren't clear to me.
Could you point me in the right direction or explain how I might complete
these tasks?
AJ ONeal
P.S. Here's the script that I've got so far, but, of course, it still needs
tweaking
#!/bin/bash
SB_DIR='ubu-backup-1.d'
UNTAR_DIR='ubu-untar.d'
RSYNC_DIR='twdp.hobby-site.org.d'
RSYNC_CUR='CURRENT.d'
RSYNC_EXCLUDE='exclude-list.txt'
#ls $SB_DIR | sort | while read BAK_DIR
#do
# DEST_DIR=$UNTAR_DIR/`echo $BAK_DIR | cut -d'.' -f1-3`
# mkdir -p $DEST_DIR
# tar xzvf $SB_DIR/$BAK_DIR/files.tgz -C $DEST_DIR
#done
#mkdir -p $RSYNC_DIR
#FIRST_BACKUP=`ls $UNTAR_DIR | sort | head -n 1`
NUM_BACKUPS=$((`ls $UNTAR_DIR | wc -l`-1))
cp -a $UNTAR_DIR/$FIRST_BACKUP $RSYNC_DIR/$RSYNC_CUR
ls $UNTAR_DIR | sort | tail -n $NUM_BACKUPS | while read BAK_DIR
do
SOURCE_DIR="$UNTAR_DIR/$BAK_DIR/"
DEST_DIR="$RSYNC_DIR/$RSYNC_CUR"
rsync \
--archive --checksum --verbose \
--exclude-from $RSYNC_EXCLUDE \
--delete-excluded \
--backup --backup-dir=../$BAK_DIR.d \
$SOURCE_DIR $DEST_DIR
done
