We were entering a tricky section of the reef in the
Whitsunday’s of Australia, when I turned on the computer to look at some
chart details. "Disk not found" .. dead. I grabbed the backup drive, swapped
it with the dead drive and was up and running in less than two minutes. I
lost one GPS track which I hadn't backed up from the previous day, but since it was
still in the GPS nothing was permanently gone.
I can't stress the importance of regular backups,
drives are easily replaced...but the data is
not. How often you ask? Well, how much data can you tolerate losing?
One day, one week - that might be a lot of photos and journals. Develop a
flexible backup strategy that can easily adapt to your changing needs. We
like to make sure that work we’ve done is in at least two places at all
times.
Disk cloning creates an uncompressed, exact copy of a
hard drive; both program installations and data files. It's fast and does
not require any comparison of files or directories; it's just a brute force
job. It’s flexible; you can clone to disks that are smaller or larger
because it only needs space used by the data. Disk cloning is commonly used
to upgrade your hard drive to a larger size. What makes cloning so useful is that you can pull out your
old hard drive and replace it with the clone and you wouldn't even know the
difference; there are no programs to reinstall, no data files to copy. We
use
Acronis True Image for our cloning software. Thinkpads (IBM/Lenovo)
are great because they have easier access to the hard drive. I can
plug in the clone to make sure it works and then store it in a USB hard
drive enclosure. An external
2.5” USB hard drive
is powered directly
from the USB port and appears to your computer as a second disk once
connected. You have access to the data as if it was a local drive, with a
slight downgrade in performance (make sure you use
USB 2.0 ports for large
data transfer). This external drive becomes my backup disk and I can plug it
in anytime I want to synchronize data. In the event of hard drive failure,
it becomes the replacement drive which is ready to go with everything
pre-installed and up to date. Please be sure to follow all the manufactures
hard drive handling warnings, including anti-static precautions. I use a
cigarette lighter with the GROUND wire connected to an
anti-static wrist
strap. Also be careful with the connections, as the hard drive connector was
not designed for frequent changes.
You don't need to clone your disk every time you
change a file. That's where the synchronization software comes in.
We use
Smart Sync Pro, its job is to compare all the folders you have specified
(via a profile). It walks through and compares all the files to see what has
changed and then copies them based on your criteria. You can select from
various options, but generally, the goal is to get the new files onto the
backup disk (the cloned disk). I usually don't delete the obsolete files
until I'm sure I don't need them anymore, and it runs a little faster. Once
a month I do a full synchronize and delete the obsolete files. I set up a
couple of profiles based on my file usage. I back up my email, working
notes, GPS waypoints, routes, tracks, and working charts area on a daily
basis. On a weekly basis, I pick
the profile which does a deeper search through My Documents and lesser used
areas. Sometimes for small or daily changes, or if KT and I are
sharing data, I use Smart Sync with a flash drive for quick and easy access
and transportability. Smart Sync even synchronizes between remote unconnected computers and
networked. Do you have two computers on board? Create a
simple network, with
no extra networking hardware, with a simple
crossover cable. Then you can
synchronize the two computer's common documents instead of using the USB
stick to transfer files. You can even synchronize to a RW CD/DVD. So now
what's your excuse for not having a backup?
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