Re: Hard Disk Backup Question
- From: Ralph De Witt <rdewitt001@xxxxxxxxxxxxxxx>
- Date: Fri, 16 Nov 2007 11:12:33 -0500
On Friday 16 November 2007 09:23:24 am Bill Davidsen wrote:
Ralph De Witt wrote:Bill and Robert:
Hi All:
I have a Dell Inspiron E1705 Computer with a 80 gig hard drive. I also
have a Western Digital 500 gig My Book External USB Hard Drive attached.
I would like to Back up the entire hard drive to a partition on the
external drive. I have very little knowledge of how to do this. I have
always backed up to a CD individual files after a data loss. I thought a
auto backup routine would work, but the computer may not be on when the
backup would be scheduled, and the external hard drive partition do not
seem to want to auto mount so that would not work. I am using the kde
desk top. Could some one add to my knowledge and help me out? TIA
If you want to make a backup of the physical hard drive, such that you
could just replace the drive with an identical drive and recreate it,
you need to boot from a CD, such as the Fedora rescue CD, and just copy
the contents. Assuming that the external drive is sdb, mounted on
/mnt/external (for example):
dd if=/dev/sda bs-1M | gzip -3 >/mnt/external/2007-10-04-1410-image.gz
Note that the image must be restored to an identical hard drive, since
it's an image of the whole disk. It might work on a larger drive, but
you might not use, or even have access to, the whole drive.
There are various utilities to do this, g4u being popular. This has some
of the same limitations, but is easy to use. Because it's based on
netBSD (AFAIK) the drivers are not identical, but it can backup over a
network using ftp.
There are commercial products which do this, use Google, I haven't used
any in several years and can't suggest.
Finally, you can backup the contents of the critical data (or all files)
using programs like rsync, or using tar, cpio, or star. These require
manual partitioning of a replacement drive, restore, and rerunning grub
by hand, but offer more flexibility.
You can also put an incremental backup program call in your shutdown
sequence, to be sure you back up anything you have done in a current
session.
Hope that's a useful overview of the possibilities, I'm not sure just
what features you need, and there's always a tradeoff between
convenience of restoring a single lost file and that of restoring
everything.
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
Thanks for your reply's. I have limited knowledge in this area having only
copied files to cd after a loss of data. Was thinking along the lines of a
whole disk image, with some sort of daily/weekly update to it. How ever if
and when this drive dies I would replace with a larger one, so that is a
problem. Perhaps the best solution is to use Kbackup from root and do the
whole drive weekly. It makes a date/timed 4.5 GB tar file of my Hard Drive as
I have 77 GB allocated, I could have several of these for restoring. Again
thank you for your help.
--
Yours,
Ralph.
It said Use Windows XP or better, so I installed Kubuntu 7.10
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- From: Ralph De Witt
- Re: Hard Disk Backup Question
- From: Bill Davidsen
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