Re: [cobalt-users] [Raq4] Max Hard Drive Size?

["William J.A. Brillinger" <billy@xxxxxxxxxx>]

At 11:02 AM 31/12/02 -0500, you wrote:
> Jerry wrote:
> > See Link: http://www.accusys.com.tw/prod.htm
> >
> > RE:IDE RAID Solution ACS-7510 RAID Kit
> >
> > Any way because of the power issue and not being terribly fond of a
> software
> > RAID the Accusys product looks like if might be the best alternative since
> > it uses 2 2.5" Notebook drives mounted to a 3.5" drive sled.
> >
> I took a look at this - looks pretty cool, for a number of different types
> of applications.
>
> IIRC, though, laptop hard drives are considerably slower than desktop
> counterparts. Not sure how that will/won't affect your situation.
>
> Rick

Looking at the specs for the fujitsu 20gig notebook drive I bought last 
night: http://www.fujitsu.ca/products/storage/mobile/h15l.html#performance_spec

  Rotational speed 4,200 rpm
  Average latency 7.14 ms
  Average seek time 12 ms (typ.)
  Interface transfer rate 100 MB/sec. (UltraDMA 100)
  Internal transfer rate 18.4 to 32.5 MB/sec.

and the specs for my cobalt seagate 15gig drive:

http://www.seagate.com/support/disc/specs/ata/st315323a.html

  INTERNAL TRANSFER RATE (Mbits/sec) _______up to 308
  EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 66.6
  AVERAGE LATENCY (mSEC) ___________________5.56
  INTERFACE ________________________________Ultra ATA/66
  SPINDLE SPEED (RPM) ______________________5400
  AVERAGE ACCESS (ms seek/read/write) ______8.9/10.5/11.5
  SINGLE TRACK SEEK (ms seek/read/write) ___/1.5/2.1
  MAX FULL SEEK (ms seek/read/write) _______/23.0/25.0

I'd say that the performance is probably about the same on average given 
the ata 100 over the ata 66.

- Bill B.







---------------------------------
William J.A. Brillinger
Precision Design Co.

E-Mail:   mailto:billy@xxxxxxxxxx
Web site: http://www.pdcweb.net