Michael George wrote:
>
> I've been using an atapi CD-ROM for years and I've never had to use this
> ide-scsi stuff. Could someone tell me where I go to learm more about it --
> what it's for and when it's needed?
>
> I checked in /usr/doc, /usr/doc/HOWTO, and /usr/src/linux/Documentation for
> pertient files, but found none. Any direction is appreciated.
>
> -Michael
>
> On May 18, Duane Clark wrote:
> > Steve wrote:
> > > Is there some trick to making the default kernel that ships with 6.2 use
> > > the ide-scsi emulator for cdroms without recompiling?
> > >
> > > It seems to be it should be possible if one knew the right incantations to
> > > put into /etc/conf.modules and /etc/lilo.conf.
> > >
> > > Has anyone tried this?
> > >
> > > --
> > > Steve Borho Voice: 314-615-6365
> > > Network Engineer
> > > Celox Networking Inc
> >
> > I have been able to configure things without compiling to use ide-scsi
> > and manual mounting of cdroms just fine. I have so far not figured out a
> > way to make the automounter work, unless I recompile the kernel. I have
> > my own Redhat specific version of both methods detailed on a web page:
> > http://www.leewardfpga.com/cdrw.html
> >
> > I am beginning to become disillusioned with the automounter though.
> > After a reboot, it works fine for a half a day or so, but then for some
> > reason that I have not yet pinned down, the automount daemon "magicdev"
> > goes berzerk and starts consuming significant amounts of CPU time and
> > affecting the performance of everything else. Killing it returns things
> > to normal, well except that now I don't have an automounter.
>
> --
> No, my friend, the way to have good and safe government, is not to trust it
> all to one, but to divide it among the many, distributing to every one exactly
> the functions he is competent to. It is by dividing and subdividing these
> republics from the national one down through all its subordinations, until it
> ends in the administration of every man's farm by himself; by placing under
> every one what his own eye may superintend, that all will be done for the
> best.
> -- Thomas Jefferson, to Joseph Cabell, 1816
>
> --
> To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe"
> as the Subject.
Michael:
SCSI is traditionally faster than IDE. But to run SCSI you will pay for
a SCSI card and the hard drives and CD-ROMS are more expensive. You
don't have the same limitations on SCSI as you do with IDE. On IDE you
have 2 channels with a maximum of 2 Hard drives on each. Unlike SCSI
operation if you require access of two hard drives on the same IDE
channel then the operations are sequential whereas on SCSI they can
occur in parallel. It's not quite that simple, it has to do with
certain access features on the SCSI hard drives. The bottom line is
that SCSI is faster. With SCSI you can utilize RAID drives (which again
to keep it simple, is a way of combining multiple drives so they look
like a single drive, and with the provision of a degree of protection in
some raid set ups. You can therefore assempble a much bigger and faster
drive using SCSI than you can can using IDE. So, if you had just 40Gb
hard drives you could get on the standard IDE PC setup only 4x40Gb but
on SCSI for a single channel you can get 7x40Gb and some cards come with
more than one channel. I've been away from this for a while. But if I
remember right, for a certain SCSI interface on product lines that will
remain nameless in this discussion, I think there were a total of 14
Hard Drives. I'm sure that someone will read this and tune us both into
what the current capacities and limitation are. But this should get
your started.
I'm having a database server built for my network using the promise card
and a RAID 10 setup which I'm not exactly sure what that means but I
will have 80 gig consisting of 2 40gig drives configured as one RAID
drive with another RAID image/shadow drive of the same arrangement with
a total of 160gig. Then there will be 2 IDE drives UDMA66 protocol, one
for the Linux operating sytem, and one for workspace for the sql
operations and that sort of thing. The RAID technology employed here
will ensure that if 1 drive dies (usually only one goes at a time) the
system will remain up and running. So there's an example for you. It
would probably be wise to have the two 10Mb IDE hard drives on separate
IDE channels, with the CDROM as the slave on the first channel. I'd
better check that out because I sure don't want sequenctial operation
between the 2 IDE hard drives. In the past I've always put my IDE Hard
drives on the first channel and the third on the second channel and
after that the ATAPI IDE CD-ROM. Maybe that wasn't too bright. So I'm
saying that if one has 2 IDE hard drives that maybe it would be better
that they were on separate IDE channels. Maybe someone could tune us in
on this one too.
Have a nice day. You'll probably get a lot more input now, I'll be
watching.
Bye-thanks_TED
--
To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe"
as the Subject.
