On Tue, 18 May 1999, Tim Duggan wrote:
> Hi Laurent,
>
> New drives should all be backward compatible. If your machine supports udma
> it will use it, if not, it won't use udma. The ultra dma, like ultra scsi,
> spec is a speed thing. If your controller supports it you get the higher
> transfer speed, if not you run at the older (read slower) speed. I believe
> the max speed for udma is 33.6MB/s the older speed is 13 or 14MB/s.
After linux.com's new unveiling one of my coworkers noticed a piece on tuning
ide devices that says dma and fast speeds are by default off. His box was,
indeed, in this condition (I pretty well only run scsi).
I presume laptops have the same probs his desktop had.
ciao,
der.hans
> As for thermal issues, it has been my experience that newer parts tend to be
> more efficient and use less power, thereby generating less heat. (The one
> exception being the processor, generally faster means hotter, although chips
> specifically designed for battery operation in laptops use alot less power
> than their desktop relatives)
>
> Good luck,
> Tim
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
> > Sent: Monday, May 17, 1999 9:57 AM
> > To: [EMAIL PROTECTED]
> > Subject: Notebook hard disk upgrade
> >
> > Hi all,
> >
> > sorry, I know this is not really a Linux-related question, but I just
> > could not figure out where I could find information, and I have seen
> > some very knowledgeable people posting here (I actually remember
> > a floppy disk emergency rescue operation...). If this is really off
> > topic and you know a more appropriate place where I could post,
> > please let me know.
> >
> > Back to my questions:
> > I plan to upgrade my good old 1.5 Gb hard disk to a bigger one. I
> > am the happy owner of a Toshiba Portege 300 CT.
> >
> > I did a search on DejaNews, to read that the height of
> > the hard disk should not be exceed 12 millimeters. I then
> > opened my notebook and confirmed that.
> >
> > Now I have 2 questions:
> > - For the bus is IDE, what is the deal with ultra dma or not ?
> > I mean, I think that my notebook has a plain old ide controller.
> > When I phoned a shop, they told me that my portege could
> > support an ultra dma device. I then checked on Toshiba's
> > site, but the info that came up for the 300 CT was the one
> > corresponding to the 320 CT (which supports UDMA).
> > I have to admit I'm confused now. I have seen 6.5 Gb Toshiba
> > hard disks 2.5 inch going for about $300, but I do
> > not really know if I can use one of these (and actually all
> > the sellers tell me it's okay but they seem to be eager
> > to sell...)
> >
> > - What about heat dissipation ? I mean, I suppose that
> > the different parts of a notebook are designed and put together
> > to avoid any problem due to heat, but what may happen if I change
> > one of the elements ? Anyone with such an experience ?
> >
> > Well, enough babbling, I would really appreciate any insights,
> >
> > regards from Paris,
> >
> > Laurent
>
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