[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [ARSCLIST] Hard disk drives and DAT
Well, Richard, my answer was in my earlier post - "migrate, migrate,
migrate". I don't subscribe to 100-year life expectancies any more
once files are digital.
See below for direct replies to your scenarios. Others, please hit
the delete key now.
BMS/ Chace LLC
1801 8th Ave. S. Suite 200
Nashville, TN 37203
office (615) 385-1251
On Mar 28, 2007, at 6:33 PM, Richard L. Hess wrote:
At 05:24 PM 2007-03-28, John Spencer wrote:Great. Who is paying for it? Certainly not small archives on their own.
My initial intent for responding to the post was simply to point out
there are other options for underfunded archival projects. HDDs and
CD-Rs are not the only cost-effective solutions, but I sense my
thinking is in the minority....
Perhaps, John, I am confused about what cost-effective solutions
you are suggesting. Could we step back a bit and clearly see the
offerings that you and others are suggesting? I am open to a wide
variety of cost-effective solutions. However, in the cost-effective
solution that you propose, I would like to see the basic framework
for the 100-year life briefly outlined. For example, I will do this
for three options:
(1) Institutional repository (IR): This is stored on enterprise-
class SAN systems with LTO tape backup (or equal). There is
management in place to shepherd the frequent technology-driven
migrations to different architectures and storage media as the IT
industry climate changes. There is a mandate to develop and
maintain this IR at the highest level of the institution. The
"client" base for the IR is broad enough that is is not serving one
or two departments, but rather integrated across the entire
structure of the institution.
Additionally, we find that sometimes IT Departments of institutions
are much more burdened with the daily tasks of keeping the network
safe and secure, so this may require an additional layer of staffing
and hardware, etc.
NAS appliances are not mentioned at all in the current version of the
NARAS Deliverables doc, if that is the one you are referring to
(version .44, soon to be on the Grammy site).
(2) NAS Appliances: NAS Appliances (as required by NARAS) with LTO
tape backup. When these devices and tapes are delivered, then who,
long term will manage them? These devices/media also require
migration. The NAS appliance can be hooked to an institutional LAN
and the LTO tapes can be added to the institutional media library.
This requires both OS synchronization for the NAS appliance (at
least to some degree, especially if a rights structure is in use)
and a typically read minus two, write minus one generation scenario
for migration for the tape. In fact, long-term active management of
this option is simplified by the IR model as the data is treated
more homogenously. Of course, the bigger the basket, the more eggs
that are broken with the fall.
Again, before we throw out the vast infrastructure needed to store
2-4TB of data, let's not get out of hand - it's not as though you
have to add staff to manage that pretty easily.
I think you will find that many of the proposed (and shipping)
consumer formats (Blu-Ray/ HD-DVD/ Combo) to have a much shorter life
span than CD ever had. DVDs certainly haven't had that many years of
market domination, and if/ when other optical formats become more
abundant - will there be other options for delivery and storage of
(3) CDs/DVDs: These need to be sampled every year or two and
monitored and migrated. When Blu-Ray or similar is a viable
technology then a migration may happen. When UltaViolet-Ray discs
become common, then another migration needs to occur. Generations
can be skipped more easily in these more-consumer-ish formats than
in the IT pro formats in (1) and (2) as long as functional readers
for the older, bulkier media are readily available. There is a
chance that gold CD-Rs, coupled with the availability of garage-
sale CD players MAY (stress MAY) just make the 100 years on their
own. I do not see that for any other without active management.
I never liked the fact there were numerous DVD products out there
that did not conform to the DVD patent-holders consortium.
I won't touch this!
None of these scenarios (except PERHAPS the gold CD-R) is immune
from funding interruptions.
Richard L. Hess email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/
Quality tape transfers -- even from hard-to-play tapes.