[ale] Restore DVD

[linux]

4 +  hours does seem a bit long

be interesting to do the same to  an external hard disk and
see the time there.

I have never been really satisfied with restoral times from  CD/DVD



   -------Original Message-------
   > From: Christopher Fowler <cfowler at outpostsentinel.com>
   > Subject: [ale] Restore DVD
   > Sent: 20 Oct 2004 17:06:16
   >
   >  I'm creating a restore DVD and it is taking a very long time to restore
   >  the data.  It takes longer to restore than it did to install the system.
   >  
   >  I'm using dump/restore to do the archival and restoration.  When I do
   >  create the backup I am creating it with the option '-j9'.  This adds the
   >  highest level ob bzip2 compression.  I am not concerned with the
   >  resources that takes since the system is a 3.0P4 with 1mb cache.  It has
   >  plenty of horsepower to do the restoration.
   >  
   >  What  I can not figure out is why it is taking so long.
   >  
   >  Here is the data:
   >  
   >  #1 Restore DVD
   >  
   >  12x CD-RW used for testing and not wasting blank CD-Rs
   >  
   >  
   >  #2 disk usage and size after restore
   >  
   >  Filesystem                Size      Used Available Use% Mounted on
   >  /dev/root.old           891.0k    387.0k    504.0k  43% /initrd
   >  /dev/hdc                651.2M    651.2M         0 100% /initrd/cd
   >  /dev/loop0               89.7M     89.7M         0 100% /
   >  none                    501.5M      3.3M    498.2M   1% /mnt/rw
   >  /dev/md0                180.0G      1.6G    169.1G   1% /mnt/rw/tmp/md0
   >  
   >  I'm only restoring 1.6G of stuff
   >  
   >  
   >  #3 Time it took to do resotre:
   >  
   >  *************************************************
   >  * Restoration Complete!                         *
   >  *************************************************
   >  Restoration took 15903 seconds
   >  
   >  That is a very long time
   >  
   >  #4 Script used
   >  #!/bin/sh
   >  
   >  echo "*************************************************"
   >  echo "* Restore System to Factory Defaults            *"
   >  echo "*************************************************"
   >  echo -n "Are you sure (y/n): "
   >  read ans
   >  if [ $ans != 'y' ]
   >  then
   >          exit 0
   >  fi
   >  
   >  START=`date +%s`
   >  
   >  raidstop --configfile /data/raidtab /dev/md0 2>/dev/null 1>/dev/null
   >  echo "Blanking /dev/hda"
   >  dd if=/dev/zero of=/dev/hda1 bs=1024k count=100
   >  dd if=/dev/zero of=/dev/hda2 bs=1024k count=100
   >  dd if=/dev/zero of=/dev/hda bs=1024k count=5
   >  echo "Blanking /dev/hdb"
   >  dd if=/dev/zero of=/dev/hdb1 bs=1024k count=100
   >  dd if=/dev/zero of=/dev/hdb2 bs=1024k count=100
   >  echo "Creating partitions on /dev/hda"
   >  sfdisk /dev/hda < /data/hda.out || exit 1
   >  echo "Creating partitions on /dev/hdb"
   >  sfdisk /dev/hdb < /data/hdb.out || exit 2
   >  echo "Creating swap on /dev/hda2"
   >  mkswap -v1 /dev/hda2 || exit 2
   >  echo "Creating swap on /dev/hdb2"
   >  mkswap -v1 /dev/hda2 || exit 2
   >  echo "Turning RAID1 on /dev/md0"
   >  mkraid --configfile /data/raidtab --really-force /dev/md0 || exit 3
   >  echo "Creating FS"
   >  mke2fs -j -i 4096 /dev/md0 || exit 4
   >  echo "Mounting FS"
   >  mkdir /tmp/md0 || exit 5
   >  mount -t ext3 /dev/md0 /tmp/md0 || exit 6
   >  echo "Restoring files (this may take a while)...."
   >  cd /tmp/md0
   >  restore -rvf /data/dump.out
   >  mkdir proc
   >  mkdir sys
   >  cd /
   >  echo "Restoring GRUB."      
   >  grub --batch < /data/grub.conf
   >  STOP=`date +%s`
   >  TTIME=`expr $STOP - $START`
   >  echo ""
   >  echo "*************************************************"
   >  echo "* Restoration Complete!                         *"
   >  echo "*************************************************"
   >  echo "Restoration took $TTIME seconds"
   >  
   >  
   >  Should I skip restore and use tar?
   >  
   >  
   >  
   >  
   >  
   >  _______________________________________________
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   >  Ale at ale.org
   >  http://www.ale.org/mailman/listinfo/ale
   -------Original Message-------


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