Re: iSCSI Boot: Technical Issues

[Mark Bakke <mbakke@cisco.com>]

I see your point.  In fact, we would take "4" as
0004-0000-0000-0000.  How about saying:

Within dashes, zeroes to the left; e.g. 4A == 004A.
Missing dashed fields become zeroes to the right.

4A = 004A-0000-0000-0000
12C-4-32 = 012C-0004-0032-0000

etc.  This is more what I think the user would expect.

--
Mark

Luben Tuikov wrote:
> 
> --- Mark Bakke <mbakke@cisco.com> wrote:
> >
> > This all means that when specifying a first-level LUN, it
> > would be (let's say LUN 4) 0004-0000-0000-0000.  So
> > saying
> > they are unspecified to the right would be the way to go.
> 
> Careful!
> 
> Tom, Dick and Harriet are used to just enter for a LUN a
> number (and they think it's a number), so you'll have
> ppl entering just `4'. Using ``to the right'' would make
> this 4000-0000-0000-0000, contrary to your example.
> 
> Using ``to the right'' rule is kind of half way telling
> users _what_ the SAM-3 LUN structure might be like and
> I also don't think this is wise as Julian has suggested.
> 
> Natural ordering (e.g. what humans use) would
> suggest ``to the left'' rule. So that the current
> (physical)
> addressing of LUN (`4') and the future (801F-0000-...)
> supported addressing are both easy on users.
> (This was more or less my original argument for the
> ``to the left rule''.)
> 
> Q: is xxxx-xxxx-xxxx-xxxx supposed to be _just_ as
> SAM-3 stipulates? (rhetorical question)
> 
> If so, then ``within each group of 4 hexacedimal digits
> zeros are filled to the right, and groups of zeros
> are filled to the left'' might be a wiser stipulation.
> 
> This ``right/left'' rule will be easy on the average user's
> (the luser :-)) brain not to strain too much to understand
> what it is (LUN) and that the good old '4' still
> works just as the newer '801F-0000-...'.
> 
> --
> Luben
> 
> =====
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> 
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-- 
Mark A. Bakke
Cisco Systems
mbakke@cisco.com
763.398.1054