Re: @$#%&* Installation!!!!

Clint Bach wrote:

> I may give the emc thing a break for a short time while I digest the
> problems and determine a direction to go. I was delighted to get the
> emc simulation running. At leasty I'm confident the problem is with
> rtlinux and not emc.

Well, first make sure your kernel is 2.0.36 exactly. You can use the
command more /proc/version to find out what your kernel version
is. The patch will make messes if not applied to the correct version.

Second, make sure you are root, or you don't have the priveledge to
install kernel modules (although there are ways around this).

Try out the RT test programs that are included with the RT patch kit.
The one that makes Linus Torvald's voice come out of the PC speaker
doesn't seem to produce much sound on the machines I've tried it on,
but the program seems to function without crashing. The program that
produces a square wave on one of the parallel port bits DOES work,
you should try this.

If the kernel modules die, it is likely due to a problem with allocating the
shared memory region at the top of physical memory. This is done
with a special command added to the LILO information that loads
the kernel. You might try more /proc/meminfo both with and without
the command that reserves the memory through LILO to see if the
command causes the kernel to load with less memory available to
Linux. If the memory is the same, then for some reason LILO is NOT
reserving any memory for the RT communication. This will cause
the kernel modules to die with a segment fault, and show 'unitialized'
in the lsmod command.

> Now for a basic linux newbie question... I have two hard drives in
> removable bays. Hda and hdc, How do I mount them at the same time?
> Where is the proper mount point for the second drive. Shaking the
> computer doesn't help on this one!

I'm no expert here, but I think you first create a 'special device' in the
/dev directory or use one of the ones already there. There are pages
of /dev/hda and /dev/hdc entries already on my system, I would guess
you will also see these on yours. Then, you need to create a mount point
for the drive's file system, under your primary disk's /mnt directory.
Look at such entries as /mnt/floppy and such to see how they are set
up. Once you have the mount point created, you would mount the 2nd
drive with a command like mount /dev/hdc /mnt/drive2 (assuming that
/mnt/drive2 is what you created as the mount point). That should
do it.

Jon