naturerecordists
[Top] [All Lists]

Re: capacity of magnetic media

Subject: Re: capacity of magnetic media
From: "Rich Peet" <>
Date: Sat, 20 Dec 2003 22:58:26 -0000
Not a unique situation for me to be in the minority.

CD-R, DVD-R can not be verified easily as to the integrity of the 
archive. Shelf life both before and after burn are now known to be 
well under what was promised. I have not seen one source of CD 
hardware that isn't set on marketing the only issues as being speed 
and size.  What I care about is life.

So where I am right now is in external hard drive storage. Easily 
refreshed and easily checked for quality of storage. For more size 
and ease in transfer to the mirror I want compression.  It just so 
happens right now that the best compression is also free and open.

I see Windows 98 as of January will have no support.  That is 4 years 
after they first got it working with second edition until it was 
buried.  Support is a fiction.

Rich

--- In  Jeremiah Moore <> 
wrote:
> Storage is not the major choke point - bandwidth is.  Lossless 
> compression technology will find its best application in network 
> transmission of material:  speeding long distance collaboration and 
> delivery.
> 
> I agree with Walt vis a vis being conservative with formats for 
> archiving.  PCM bwav (broadcast wav) on well-stored commodity media 
> (CD-R, DVD-R) with periodic re-copying is looking pretty future-
proof 
> at this point.
> 
> -j
> 
> 
> >Walter Knapp wrote:
> >
> >>  We should not get into the mode of
> >>  expecting infinite expansion of
> >>  capacity with time. Some of the
> >>  most data dense hard drives now are
> >>  approaching putting each bit on only
> >>  one particle of magnetic material
> >>  in the disk coating. That's a limit
> >>  that's going to be hard to get around.
> >
> >Not to worry:
> >http://www.pcworld.com/news/article/0,aid,113444,pg,4,00.asp
> >
> >Though most consumers aren't clamoring for more storage,
> >manufacturers continue to seek ways to build bigger drives.
> >
> >"The two most promising technologies in the labs today are
> >perpendicular recording and heat-assisted magnetic recording," says
> >longtime storage analyst Jim Porter, principal at Disk/Trend.
> >
> >Maxtor recently used perpendicular recording to store up to 175GB 
per
> >hard-disk platter, surpassing today's maximum of 100GB. Instead of
> >storing data by magnetically orienting the particles on the 
platter's
> >surface longitudinally along a circular track (like laying bar
> >magnets flat--some oriented north-south, others south-north--in a
> >circle), this scheme magnetically orients the particles 
perpendicular
> >to the drive's surface (like a circle of bar magnets standing on
> >end). Perpendicular recording can pack data more densely, and could
> >spawn drives of 700GB, or roughly double the current maximum, in 
two
> >to three years.
> >
> >Heat-assisted magnetic recording uses a more magnetically stable 
disk
> >surface, allowing denser packing and increasing data stability.
> >Normally this requires a stronger write head to orient the 
particles
> >of the disk's surface. But HAMR drives use a laser to heat the spot
> >being written to in order to make it easier to orient magnetically.
> >Seagate has demonstrated HAMR technology that it claims could
> >ultimately store 50 terabytes per square inch.
> >
> >However, warns Porter, such technology could be five to ten years
> >away. Data density is still growing at about 50 percent per year
> >using less-costly, conventional techniques.
> >
> >"The most important spec on any drive is price," says Porter. "None
> >of this [new] technology will turn into products as long as
> >manufacturers can produce conventional drives for less."
> >
> >
> >
> >
> >To unsubscribe from this group, send an email to:
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
> >  http://groups.yahoo.com/group/naturerecordists/
> >
> >To unsubscribe from this group, send an email to:
> >  
> >
> >Your use of Yahoo! Groups is subject to:
> >  http://docs.yahoo.com/info/terms/
> 
> -- 
> -------------------------------------------------------------------
> jeremiah lyman moore | san francisco | sound+media | 
> http://babyjane.com/timeweb/
> http://northstation.net/ organic, mechanized, organized sound



________________________________________________________________________
________________________________________________________________________


To unsubscribe from this group, send an email to:




------------------------------------------------------------------------
Yahoo! Groups Links

To visit your group on the web, go to:
 http://groups.yahoo.com/group/naturerecordists/

To unsubscribe from this group, send an email to:
 

Your use of Yahoo! Groups is subject to:
 http://docs.yahoo.com/info/terms/ 
------------------------------------------------------------------------


<Prev in Thread] Current Thread [Next in Thread>
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU