On Thu, 02 Feb 2006 17:12:16 -0500, Charles May wrote:

>It has been my experience through the years that there is no such thing 
>as a quiet ball bearing.  They produce a multitude of frequencies that 
>will change over time with wear.  If a dey lubricant sleeve bearing is 
>used that may be something else.  Perhaps an oil impregnated bronze 
>sleeve may suffice.  I believe it is called oilite.

Hard drives are now using what the manufacturers call a "liquid
bearing"... and they are MUCH quieter than the old hard drives.

31-32dB has dropped to 21dB or so... and since that's a log scale,
that's 1/10th the noise.

I certainly don't miss the whine of the old hard drives, given that I
used to have one box with FOURTEEN attached on Promise controllers.

Don't know of any liquid-bearing case fans (as yet), but the Vantec
Stealth fans are rated at 21dB, and compared to a 40-50dB case fan from
other manufacturers, well worth the small cost.

http://www.vantecusa.com/product-cooling.html

The Stealth 8025L has been a standard for me for several years now... 
but I routinely replace the fans in Antec cases with the SF12025L 120mm
fan, and those in the Supermicro CSE-M35T 5-bay SATA hot-swap RAID
array cages with the SF9225L 92mm unit.

(anyone want a bunch of noisy case fans, cheap? :)  )


(was this about OS/2 at some point? :)  )

-Derek


Derek W. Keoughan,
Finnegan Software, Inc.,  Brampton, Ontario, Canada  http://www.finnsoft.com
416-410-4774 phone - 800-258-0033 toll free - 905-846-5516 fax

Consulting, Networking, Cabling, Internet, Hardware, Software, Tech Support
eComStation, OS/2 Warp/Server, WinXP/2000/NT/Me/9x, Linux
Customized PURRformance PC's & Servers, OnSite Services, Installations
and Upgrades

= Celebrating 11 years of "happily purring" computing - Founded
1995-02-02 =

FinnSoft "CyberCat" logo clothing and more -
http://www.cafepress.com/finnsoft




 
Yahoo! Groups Links

 To visit your group on the web, go to:
    http://groups.yahoo.com/group/os2hardware/

 To unsubscribe from this group, send an email to:
    os2hardware-unsubscribe{at}yahoogroups.com

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




---