Transfer speed to drives

Hello again,

I should have also said....the reason why a CD or DVD drive shouyld not share
the same port as a Hard Drive is that everytime the CD or DVD sends and
receives data the whole port will slow down to the speed of the CD or
DVD.......

--
Best Wishes.....John Kelly
www.the-kellys.org
www.the-kellys.co.uk
Just glad I don't live in Croydon, UK
\|||/
(o o)
----------ooO-(_)-Ooo-------------
All material gained from other sources is duly acknowledged. No Value is
obtained by publishing in any format other peoples work

Thanks John, I'll take a look. BTW that disk you're
recommending must be nuclear powered - 72,000rpm?? (don't
worry, I know wot u mean!)
Also by the way, someone said to me yesterday that the
oft-stated speed problem arising from mixing a HDD and CD
on the same port was actually a total myth. I don't know
what grounds he had for saying that, but generally he
knows his stuff pretty well. And if I did go ahead like
that, does it make any diff if you set the HDD to master
and the CD to slave, or if you have them both on CS?
Tks again
CW
(PS I thought it was Slough that was the butt of jokes,
what did I miss re Croydon?)

>-----Original Message-----
>Hello there,
>
> There are some illustrated notes in the Disk

Drive section on my web

> site....basically though...go for an internal

72,000 RPM. In addition DO NOT

> put it onto a controller port that is also

serving a CD or DVD drive. Instead

> if you have a spare slot purchase an EIDE/PCI

card (quite cheap) and run all

> drivers other than C from that...leave CD and DVD

drives where they are. The

> reason is any EIDE card you buy is almost

certainly more efficient than the on

> board device and as a result data transfer will

be faster. With CD and DVD

> drives the port is many times faster than the

drive, so leave them where they

> are.
>
>--
>Best Wishes.....John Kelly
>www.the-kellys.org
>www.the-kellys.co.uk
>Just glad I don't live in Croydon, UK
> \|||/
> (o o)
>----------ooO-(_)-Ooo-------------
>All material gained from other sources is duly

acknowledged. No Value is

>obtained by publishing in any format other peoples work
>.
>

Hello there CW,

The mixed type on a cable problem can be shown by two steps....whilst Windows
Explorer is already running and whilst doing a capture use explorer to open a
directory on the CD...note what time you did that at and afterwards open a
directory on a hard drive. You should see more disruption on because of the CD
and probably none from the hard drive. Its not something I can prove myself but
I am assured by quite a few people that it is correct, including my youngest
son who is....

Mike Kelly

Sr. Systems Engineer
Symantec

Michael did not finish school due to health issues and did his first degree when
I did mine (whilst still off school) His prior boss Richard Ricardi when he was
here in the UK demonstrated it to me...it was after that that I put both ROM
drives on the 2nd port ...it seemed to make a difference for me. The way Richard
described it was to consider the cable to be a freeway.....the faster moving
vehicles get stuck behind the slower vehicles until such time as the slower
vehicles leave the freeway. For the test mentioned above to succeed both hard
drive and ROM have to be accessed at the same time, and if you wish you can
substitute Data Packet for Vehicles in the above. The explanation seems
reasonable enough to me. I can't imagine a packet for the faster device
overtaking a packet for the slower device. The same was always true for ordinary
modems as well...if you were receiving data at the same time as transmitting
your download would drop to the speed of the upload. I don't know if that's true
for cable modems.

As far as cable select goes...for no good reason, just personal preference, I
like to set the hardware to master or slave....I can't say that it definitely
does but I suspect that you are removing a decision from the system and thereby
saving on at least one "T" state (That's equal to one decision at the very base
level for the CPU)

Croydon has apparently got the highest number of registered sex offenders, in
particular pedophiles. It also has some of the highest crime figures for
violence against the person, muggings etc etc. It has become so bad that they
made a documentary about it on English TV (A couple of months back) I can't
remember the name of the website now, its to do with one of those Estate Agent
firms.....you can get to see some generalized figures about what a particular
post code is like, what is not all that surprising is that the number of
properties up for sale is on the increase....especially after one of those
housing associations started giving 4 bedroom detached houses to asylum
seekers. I have personally seen what effect that has had All I can say is that
I am glad I do not live there and that after just 12 months my oldest lad has
sold up and moved.

--
Best Wishes.....John Kelly
www.the-kellys.org
www.the-kellys.co.uk
Just glad I don't live in Croydon, UK
\|||/
(o o)
----------ooO-(_)-Ooo-------------
All material gained from other sources is duly acknowledged. No Value is
obtained by publishing in any format other peoples work

Great explanation, thank you. Excellent analogy re the
traffic on the motorway, slower stuck behind faster, and
all that. I guess that with your background you must know
what you are talking about here.
I know curiosity killed the cat, and all that, but why
are HDD data packets the speed merchants, and CD/DVD
packets the slowcoaches? What's the diff?
Thanks again
CW
Beaconsfield. Too near Slough.

>-----Original Message-----
>Hello there CW,
>
> The mixed type on a cable problem can be shown by

two steps....whilst Windows

> Explorer is already running and whilst doing a

capture use explorer to open a

> directory on the CD...note what time you did that

at and afterwards open a

> directory on a hard drive. You should see more

disruption on because of the CD

> and probably none from the hard drive. Its not

something I can prove myself but

> I am assured by quite a few people that it is

correct, including my youngest

> son who is....
>
>Mike Kelly
>
>Sr. Systems Engineer
>Symantec
>
>Michael did not finish school due to health issues and

did his first degree when

>I did mine (whilst still off school) His prior boss

Richard Ricardi when he was

>here in the UK demonstrated it to me...it was after that

that I put both ROM

>drives on the 2nd port ...it seemed to make a difference

for me. The way Richard

>described it was to consider the cable to be a

freeway.....the faster moving

>vehicles get stuck behind the slower vehicles until such

time as the slower

>vehicles leave the freeway. For the test mentioned above

to succeed both hard

>drive and ROM have to be accessed at the same time, and

if you wish you can

>substitute Data Packet for Vehicles in the above. The

explanation seems

>reasonable enough to me. I can't imagine a packet for

the faster device

>overtaking a packet for the slower device. The same was

always true for ordinary

>modems as well...if you were receiving data at the same

time as transmitting

>your download would drop to the speed of the upload. I

don't know if that's true

>for cable modems.
>
>As far as cable select goes...for no good reason, just

personal preference, I

>like to set the hardware to master or slave....I can't

say that it definitely

>does but I suspect that you are removing a decision from

the system and thereby

>saving on at least one "T" state (That's equal to one

decision at the very base

>level for the CPU)
>
> Croydon has apparently got the highest number of

registered sex offenders, in

> particular pedophiles. It also has some of the

highest crime figures for

> violence against the person, muggings etc etc. It

has become so bad that they

> made a documentary about it on English TV (A

couple of months back) I can't

> remember the name of the website now, its to do

with one of those Estate Agent

> firms.....you can get to see some generalized

figures about what a particular

> post code is like, what is not all that

surprising is that the number of

> properties up for sale is on the

increase....especially after one of those

> housing associations started giving 4 bedroom

detached houses to asylum

> seekers. I have personally seen what effect that

has had All I can say is that

> I am glad I do not live there and that after just

12 months my oldest lad has

> sold up and moved.
>
>--
>Best Wishes.....John Kelly
>www.the-kellys.org
>www.the-kellys.co.uk
>Just glad I don't live in Croydon, UK
> \|||/
> (o o)
>----------ooO-(_)-Ooo-------------
>All material gained from other sources is duly

acknowledged. No Value is

>obtained by publishing in any format other peoples work
>.
>

Hello there,

Its not exactly speed. Its the rate at which the relevant buffers empty so that
new data can get in. The ready to receive signal from the ROMs will take longer
to appear than the equivalent signal from a hard drive....so a queue forms at
the EIDE interface which in turn will cause the two programs that are trying to
write to their respective devices to pause until they can send the next data
packet and that packet is not sent until further down the line the ready to
receive flag is raised. Takes deep breath

So, suppose a rom packet takes twice the time a HD packet does and the queue
counting backwards from the front of the queue consists of ROM (2st), HD(2nd),
ROM(3rd), HD, this is of course generous and gives each program an even chance
of having its own packet delivered next. The first HD packet instead of taking
one unit of time will actually take three (two for the rom plus its own)
because of that its easy to see how programs can slow down. So this all boils
down to, the data trully travels at the same speed from both devices, BUT, the
ROM data takes longer to clear because ROM drives are still basically slow
devices (Its a good reason for checking how much intrernal RAM the ROM drive
has before you buy it.....I think mine is 4MB for the CD drives and 8MB for the
DVD

As far as Movie Maker is concerned and capturing from a camera it can cause as
some already know a bottle neck.....The CPU waiting to write in real time data
to the HD is also juggling internal and often external ram holding data that
has either to be sent to or received from the ROM....Its enough to give you a
headache.

Anyway, try this website.

http://www.lowestonweb.com/Products/...0BFD9AEBD&td=1


I am very tempted even though I have no spare slots on any machine....

--
Best Wishes.....John Kelly
www.the-kellys.org
www.the-kellys.co.uk
Just glad I don't live in Croydon, UK
\|||/
(o o)
----------ooO-(_)-Ooo-------------
All material gained from other sources is duly acknowledged. No Value is
obtained by publishing in any format other peoples work

John, looks like you have found a way to overclock your HDs - wow!!!!

David - who likes having a friendly dig sometimes

John Kelly wrote:

>
> Hello there,
>
> There are some illustrated notes in the Disk Drive section on my web
> site....basically though...go for an internal 72,000 RPM. 7

Hello there,

Yes, it would be rather good to have one at that speed, that actually worked !!

--
Best Wishes.....John Kelly
www.the-kellys.org
www.the-kellys.co.uk
Just glad I don't live in Croydon, UK
\|||/
(o o)
----------ooO-(_)-Ooo-------------
All material gained from other sources is duly acknowledged. No Value is
obtained by publishing in any format other peoples work