Re: Back-up media?
- From: Chris Cox <ccox_nopenotthis@xxxxxxxxxxx>
- Date: Thu, 02 Feb 2006 16:54:39 -0600
� wrote:
I am pondering the different alternatives for
backing up a private system. I think I have
the SW-issues sorted out but not really the HW.
Here are the alternatives I see and some of
my thoughts:
1) Burn CD: 700 MB is getting small. How reliable
is a CD? (CD is what I use today)
It's ok. A bit less reliable if CDRW vs. CDR.
2) Burn DVD: Reliability??
Ok as well.
3) RAID HDs: Once set up I won't have to do much
but all HDs will be in or very near my box so
this really only covers one disc failure but
little else.
Recommended, BUT this is NOT a backup solution.
4) Removable HD (USB/Firewire): Seems like a 'simple'
solution. How reliable are these? If I buy one of
those I guess I will soon find 'secondary' uses
for it which may not be a good idea from a back-up
stand-point.
Inexpensive and very flexible. These work reasonably
well.
Another benefit is the ability to move the device
from machine to machine.
Make sure you have a working USB 2.0 or firewire.
So much for my random firing synapses. Any of you expert
finding this worthwhile to comment on? I would be grateful
if you did.
I don't like tape. It is slow and very unreliable. Too
many parts both in the drive and the cartridges. Tape will
go the way of the dodo.
I like disk to disk for backups. You can run rsync and
just get deltas on a daily basis and it is lightning
fast. In my case, my external unit is direct attached
SCSI and is a RAID5. Hard to beat. Mine's actually
quite large capacity wise so I can backup all of the devices on my
network (though going across the network can be a bit
slow... I do have gigabit.. which helps in that case).
I use an Aiby 4bay with 4x300GB drives in a RAID5.
It really depends on how much money you want to
spend. If somebody offered me a tape based backup
system at third the cost of disk, I'd still choose
disk. By using a good external raid unit with
hotswap bays, you could even do some offsite
storage on a regular basis, but that might
be overkill for your case. Also, you obviously lose
the speed of the rsync whenever you reload the
RAID with new disks.... RAID rebuild time can
also be slow if the array is large (>2TB).
People that do backups with disk tend to be
happier people.
Just my opinion,
Chris
.
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