RE: iSCSI: 12-97 Bit Rule

[pat_thaler@agilent.com]

Luben,

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.

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.

Julian's new description is accurate and clear.
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).

Regards,
Pat

-----Original Message-----
From: Luben Tuikov [mailto:luben@splentec.com]
Sent: Thursday, June 13, 2002 12:20 PM
To: Julian Satran
Cc: iSCSI
Subject: Re: iSCSI: 12-97 Bit Rule


Julian Satran wrote:
> 
> Luben,
> 
> The draft has figure that are an integral part of it.
> In every one of those bit 7 is the least significant.
> I don't know what your NORMALLY means.

Julian, any book you open on computer architecture,
assumes that bit 7 is more significant than bit 6,
simply because 2^7 > 2^6.

Stipulating that bit 7 is less significant than
bit 6, needs explicitly to be said so, NOT
inferred from ``figures in the text''.

Nevertheless, as you may have already noticed,
the algorithm which I sent you, is _independent_
of iSCSI's implication that bit 7 is less significant
than bit 6.

So, anywhich way you order the bits in the bytes
for the rest of the draft, the algoritm would
produce the same results, simply because
it explicitly mentions ordering in step 1 (and 2).

-- 
Luben