But ridiculously expensive! Far more than the gold archive CD-R that
the professional archivist community seems to think are just fine.
Actually 8 years ago it was far cheaper than anything else on
the market if you took the media price into acount.
It is not ridiculously expensive even today, considering
the level of reliability and long-term stability you get.
However the cost of media and drives have not decreased for
the last few years, so it appears expensive.
MOD is for archiving, i.e. > 50 years data life is expected.
About 5 years a go a Phillips engineer told me they think >80
years, but that the models would get shaky at that time.
Condidering MOD has been arounf >25 years, the numbers are
still a lot more reliable than for any CD-R.
MOD is pretty popular in Japan and is the standard in medical
imaging, were images have to be archived by law for 20 years.
Personal experience is that I have not lost a single media
in 8 years and had no compatibility issues using other drives.
Even your gold archive CD-R is maybe good for 20 years if stored very
carefully. The >50 years for MOD is if thrown somewhere and forgotten
about it. Heat, humidity, dust, rough handling ,..., all do not matter.
So, e.g. family photographs, may still get lost if on the "archival CD",
they will not if on MOD (single copy is enough...). And the
chances are very good that you can still get a drive that will
read them in a few decades. Currend 3.5" MODs read and write
all 5 media generations.
Of course it is not suitable for high-volume, short duration archiving.
HDDs are better for that.
Highest capacity available in 3.5" is 2.3GB at $23.00 per disc or $10
per GB.
Has been constant for several years now. This is a really
mature technology that delivers on its promises.
I think I'd buy a tape drive at that point.
Depends on the volume and the archival time-frame. And on
whether you want a medium with fast random access.
I fiond that About 20GB or trualy reliable archival storage
is enough for me. Backups go on USB/eSATA HDDs.
Lately I've heard of some efforts to use MO-like technology
(i.e. heating the media with short laser pulses before writing) on
hard disks, but to increase capacity. I don't know if reliability
will get better or worse.
I think this is unrelated for the acual effect.