Re: iSCSI: 12-97 Bit Rule

[Luben Tuikov <luben@splentec.com>]

pat_thaler@agilent.com wrote:
>
> TCP/IP Illustrated numbers bits with bit 0 as the
> most significant. My books on Sonet number bits
> in a byte from 1 to 8. I guess you could argue
> these are not books on computer architecture, but
> the point is that not everyone numbers bits the
> same.

Uuuh, here we go again...

Yes, I can argue that those are NOT books
on computer architecure. Let me get home
I'll send you the titles/authors/ISBN
of a few books on Computer Architecture
which use the NATURAL bit ordering:

2^(x+1) > 2^x, x >= 0,
so it only _makes_sense_ to say that
bit x+1 is more significant than bit x.

Take the number 791, is the 2rd digit
more significant than the 1nd?
Well: 791 = 7*10^2 + 9*10^1 + 1*10^0.

> If you will read 1.3.1 through 1.3.3, they do
> explicitly state the significance of bits in
> iSCSI words, half-words and bytes.

Yep, and you were complaining that it was
200 pages away from 11.1 where the CRC
digest was --- or was that in a private
email? Trying to score points?

> Julian's new description is accurate and clear.

Are you sure? Are you really sure?

> Item 8 in your description is unclear and confusing
> because the bits do not "follow" each other in the
> order you state (and any viewing of bits in a message
> as a serial stream is entirely hypothetical).

Here is 8:

8) The message sent is P and appended at the end are the
   bit coefficients of CRC(x), with x^31 bit coefficient
   first, then x^30, etc.

That is after you send P, send CRC(x) as indicated.
What doesn't follow what?

Of course it is hypothetical...

Pat, let me ask you this: Is Mathematics hypothetical?

-- 
Luben