On Fri, Jul 30, 1999 at 11:57:12PM -0500, D. Carlos Knowlton wrote:
> Alright, what's going on guys?!
>
> I called Western Digital technical support to find out what I need to do to
> get my U-ATA/66 drives to transfer anything near 66MB/s, (Mega"bytes", note
> the capital 'B')like all the literature and advertising and even the news
> groups are boasting. They corrected me, and said that it is 66Mb/s
> (Mega"bits", as in 1/8th as fast.)
They're wrong.
UDMA has 66MByte/sec. bus transfer speed.
But you will _never_ get that speed from your drives. Most likely, if your
drives are fairly new 7200rpm UDMA-66 drives, you'll see something like 10-15
MByte/sec transfer rate from them.
Even from non-UDMA drives I can get 10 MBytes/sec, so obviously UDMA-66 is
not 66 Mbit/sec like in 8.25 MBytes/sec.
80 MByte/sec LVD disks don't give you 80 MBytes per second either. As the busses
become faster and faster, the bottleneck becomes the disk platter, which will
give you currently no more than 10-20 MBytes per second, even if you put your
disks on a quadruple fire-wire 2000 extra plus bus.
................................................................
: [EMAIL PROTECTED] : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob �stergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
