"Don" <> wrote in message
news:1fx0d.26546$...
> I have about 12 gig of jpeg images arranged in a variety of directories.
I
> have a number of image management programs including elements 2, ACDSee 6
> and the normal windows xp tools etc. I have a DVD burner and Nero
software
> as well. I am looking to see if I am better of using something like the
> database back up facility of ACDsee or am I better off just copying the
> directories to a DVD.
I have first-hand experience of some CD-Rs that were only about 4 years old
being largely unreadable. The second copy I made was made in the same way
and had suffered the same deterioration, though different files were
unreadable. OK, they were cheap CDs and were probably written at the
highest speed possible, but it was a valuable warning. For anything long
term, use good quality media and write at the slowest speed available.
I have just bought some Fuji PhotoDisc CD-Rs which claim to have an
"Ultra-Violet Shield" and to be "ten times more stable than normal". The
discs look black instead of the usual metallic, for whatever that is worth.
Not as cheap as most CD-Rs but worth it if the data lasts longer. I can't
find any mention of a DVD version of this.
http://www.fujifilm.co.uk/recmedia/i...g.html~content
Other manufacturers may do something similar.
I was able to recover the essential parts of the data mentioned above by
going back to one of the PCs I had been using. The hard disc was still
intact and I never delete anything if I don't have to! Hard discs are one
of the cheapest forms of storage and also appear to be one of the most
reliable, given sensible handling. You might consider using a USB hard
drive for your archive, or even two USB drives for some additional safety.
A RAID system should be considered if the photographs represent a commercial
product rather than just sentimental value. For more information on RAID
than most people will ever need, look at
http://encyclopedia.thefreedictionar...endent%20disks
or
http://sbc.webopedia.com/TERM/R/RAID.html
RAID 0 - spreading out blocks of each file across multiple disk drives but
with no redundancy.
RAID 1 - an exact copy (or mirror) of all of data on two or more disks.
RAID 0+1 - two RAID 0 stripes are created, and a RAID 1 mirror is created
over them.
RAID 5 - uses block-level striping with parity data distributed across all
member disks.
Many motherboards these days support the simpler RAID level like 0, 1, and
0+1. A better solution for a business would be RAID 5, which usually
requires an additional disc controller card. This could add a couple of
hundred $ on top of the cost of buying four hard drives. I'd still feel
happier using CD backups every now and again even if it meant feeding large
numbers of discs to the PC. Tape backup systems are cheap per gigabyte, but
the lifetime of data on a tape is abysmally short.
Also, consider off-site storage in case of something catastrophic like the
building burning down or the PC being stolen.
--
Joe
http://joe.hotchkiss.com