> Effectively it does as they are not suitable for transport and
storage like tapes are. They are fragile and handle shock very very
poorly. Ever see the guys from Iron Mountain unload the truck? I
wouldn't want disks in those storage containers.
--The firelite drive I use are specifically portable (internal cushion and
all the features built into laptop drives), though certainly not hardened.
Laptop drives, like those used in these disks, in fact all HDD, have
really poor shock characteristics. Meanwhile I can drop a tape down a
flight of stairs with no ill effects. I can also take one and rap it
against my desk. Try either with your HDD.
--If you are using Iron Mountain or any other tape storage service, you are
in a tier above where the bulk of sub 60 employee companies are.
Even SMBs use Iron Mt. and similar services. Many SMBs require
offsite retention for reasons of compliance. Other are merely
satisfying due diligence.
I guess we will have to agree to disagree. I think tapes are only necessary
in environments where it is necessary to have a big retention schedule (i.e.
7 days/weekly/monthly/quarterly/yearly)
This just barely accounts for due diligence in a backup schedule for most SMBs.
or where you have data sets exceeding 250GB.
250GBs is barely a user's workstation. Obviously you don't always do
full backups every day, but probably weekly. Considering how you can
get 1TB firewire drives these days and attach them to your Powerbook
250GB is peanuts in terms of what youmay need to be considering to
backup.
Otherwise you can get a little more creative without
measurably higher risk.
Cost per GB of tape is FAR less than disk. And considering common
rotation schedules, as you point out, it quickly becomes a sensible
media.
As I said before, if you're thinking about tape you have specific
reasons for using it.
If all you're looking to do is have a snap shot of yesterdays data,
don't implement sensible and prudent backup rotations, or don't need
offsite storage then disk can be quite sensible.
--
-dhan
------------------------------------------------------------------------
Dan Shoop email@hidden
Consulting Internet Architect email@hidden
AIM: iWiring http://www.iwiring.net/
Skype: danshoop http://www.ustsvs.com/
iWiring designs and supports Internet systems and networks based on
Mac OS X, unix, and Open Source application technologies and offers
24x7, guaranteed support to registered clients, at affordable rates.
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