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Writing to two locations at once

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Top Forums Shell Programming and Scripting Writing to two locations at once
# 1  
Old 02-08-2015
Writing to two locations at once
I have a backup script that runs on CRON that I developed about 5 years ago. It has always worked perfectly but a recent firmware update on my QNAP TS 259 has seem to break the large file move/copy capability amongst the ESATA drives.

I would like to just change my backhup.sh so that writes to two locations at once, instead of writing to one location then using CP to copy it to another location.

Code:
 
 #!/bin/sh
 ####################################
 #
 # Backup to eSATA on NAS TS259.
 #
 ####################################
  
 # What to backup.
backup_files="/share/video/. /share/music/. /share/Web/. /share/tempdownload/. /share/Data/. /share/sheri.mccormack/. /share/pictures/. /share/Documents/. /share/charlie.mccormack/. /share/sydney.mccormack/. /share/persvideo/."
 
# Where to backup to.
 dest1="/share/eSATADisk1/"
dest2="/share/eSATADisk2/"
#dest3=""
#dest4=""
  
 # Create archive filename.
 day=$(date +%Y%m%d-%H%M%S)
hostname=$(hostname -s)
archive_file="$hostname-$day.tgz"
  
 # Print start status message.
 echo "Backing up $backup_files to $dest/$archive_file"
date
echo
  
 # Backup the files using tar.
 #tar czfP $backup_files | tee $dest1/$archive_file $dest2/$archive_file
 #tar czfP $dest2/$archive_file $backup_files
 cp -rfpv $dest2/* $dest1/
  
 # cp script for moving stuff around
 #cp -rfpv $dest3/*.* $dest4/
  
 # Print end status message.
 echo
 echo "Backup finished"
 date

I also use this file to just move stuff around by adding and removing the # signs. So above were I do the tar command I assume I could write to two locations at the same time. Just not sure how to do it.

Any help greatly appreciated.

Moderator's Comments:
Mod Comment Please use CODE tags, rather than ICODE tags, for multiline samples
Last edited by Scrutinizer; 02-08-2015 at 02:00 PM.. Reason: icode tags ===>>> CODE tags
# 2  
Old 02-08-2015
In principle, sth. like
Code:
tar cz file* | tee XX.tgz > YY.tgz

seems to be doable, but never having done this I can't say if and where it will run into trouble.
This User Gave Thanks to RudiC For This Post:
mackconsult
# 3  
Old 02-08-2015
Thanks I will give this a shot and report back with results, for the benefit of the community.

Quote:
Originally Posted by RudiC
In principle, sth. like
Code:
tar cz file* | tee XX.tgz > YY.tgz

seems to be doable, but never having done this I can't say if and where it will run into trouble.
---------- Post updated at 11:02 AM ---------- Previous update was at 10:17 AM ----------

I tried the following but didn't work

Code:
tar czfP $backup_files | tee $dest1/$archive_file > $dest2/$archive_file

# 4  
Old 02-08-2015
Didn't work in which way?

How abou treading man tar? I didn't put the f option into tar command.
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