[mythtv-users] Hard drive size limitations
Ray Olszewski
ray at comarre.com
Mon Feb 9 19:44:28 EST 2004
At 07:13 PM 2/9/2004 -0500, Nathan Berg wrote:
>Newbie question here:
>
>I have a P-III 600 MHz on a Tyan S1854 Trinity 400 motherboard. It uses
>UltraDMA/66. I am trying to buy the biggest hard drive possible for this
>machine. How large can I go?
It depends.
If you need for this drive to be the boot drive, you'll need to take into
consideration the BIOS limitation on drive sizes. That's around 140 GB for
modern motherboards; offhand, I don't know what it is for yours (but the
docs that came with it probably say).
If this is a second drive intended for data storage, then in practice, the
sky's the limit. Linux does not rely on the BIOS for hard disk access, and
it has no corresponding limit. I've used drives up to 250 GB with mobos
subject to the 140 GB BIOS limit and has no problems, as long as I was not
booting from them. There is probably some limit in the kernel, but 250 GB
is the largest (IDE) drive I know of that's sold widely.
For booting from these oversize drives, I imagine there is a workaround
similar to the olden days 1024-cylinder limit fudge, which involved making
a small boot partition as the first partition, then putting the kernel
image on it. I haven't actually tried doing this, though, so it's only a
guess. (Does anyone here actually know?)
For other reasons, I tend to set up systems with a comparatively small
drive as hda (anywhere from 20 GB to 80 GB, occasionally as even small as 8
GB), using it as the boot drive and possibly as the home directories for
normal users. I've never run into a modern mobo that can't handle that size
range. Then I use one or more larger hard drives for data storage, possibly
including some home directories, such as the one for a video-capture userid
like mythtv.
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