Ian Shields Ph.D.
Linux Technologist, ISV & Developer Relations
IBM Corp
Research Triangle Park, NC
[EMAIL PROTECTED]
[EMAIL PROTECTED] wrote on 08/01/2008 03:25:08 PM:
>
> Ian Shields <[EMAIL PROTECTED]> writes:
> > > > I think that this is a reasonable forum for discussing exam
> > > objectives and the
> > > > concept of drivers, libata for example, is reasonable. The
> > > question is, for
> > > > what exam?
> > >
> > > Should libata be part of the LPI 101 exam, and therefore part of the
> > > exam objectives? If so, is it too late to get it inserted into the
> > > new exam objectives?
> >
> > The IBM developerWorks tutorial (
> > http://www.ibm.com/developerworks/linux/lpi/) for topic 101 needs
> > updating. It's on my list of things to do.
>
> Ian, I know that you are coming to LW next week. We could discuss this
live.
>
> There is a technical advisory committee meeting on the wednesday (I
believe).
> Can you make that?
>
> Also, is anyone else on the list coming to LWSF? You're all invited to
the
> TAC meeting :)
>
Sadly, I will not be there, despite the fact that I am hosting the TAC
meeting at the IBM facility in San Francisco.
>
> > libATA has been in Fedora since Fedora 7, so it's not just Ubuntu. I
> > believe ti is worth mentioning as the SCSI-like interface has at least
one
> > ramification, namely that you are limited in the number of partitions
that
> > are supported on a single disk. IIRC, you are really limited to a
maximum
> > partition number, so if you only have extended partitions on a disk
you
> > lose four partition numbers. So the partition that used to be
/dev/hda16
> > becomes unusable with libATA. That sort of thing does belong in the
LPI
> > exam IMHO.
>
> I guess my concern is that this looks a little like the '1024 cylinder
> limit' issue. It's a big deal the first time (and maybe the 2nd and
3rd) but
> it seems a little too specific for the exam. It may become a 'gimme'
> question if there are just too few things to ask around it.
Fair point. However, if you think it's important to know something of the
difference between SCSI and ATA disks, then I think it's crucial to
understand that libATA gives ATA disks much of the appearance of SCSI.
However, there are differences. One difference is that ATA disks still
have a limit of 4 primary partitions. Another is that SCSI limits the
total number of partitions much more than ATA does. As a topic on its own,
the limited set of questions might become gimmes. As an important part of
understanding SCSI/ATA differences, there are a few questions that could
be a reasonable part of a larger topic.
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