I used a setup in which the flash disk is mounted read only as / and
/tmp is mounted to a ram disk. For the file which are to be modified
I've symbolic links to the /tmp tree in the ram disk
these files/dirs are linked out (depend on your configuration):
etc/mtab -> /proc/mounts
etc/psdevtab -> /tmp/psdevtab
var/lock -> /tmp/var/lock
var/log -> /tmp/var/log
var/run -> /tmp/var/run
part of my init script:
#################################################################
# Parameter
TMP_KB_SIZE='1024'
TMP_DEVICE='/dev/ram2'
PATH=/usr/bin:/bin:/sbin:/usr/X11R6/bin
mount -n -o remount,ro / 2>/dev/null
#mount -n -o remount,rw / 2>/dev/null
mount -n -t proc /proc /proc
echo "/tmp in RAM-disk anlegen"
umount -n /tmp
mkfs.ext2 -q ${TMP_DEVICE} ${TMP_KB_SIZE}
mount -n -t ext2 ${TMP_DEVICE} /tmp
rm -r /tmp/lost*
chmod ugo+rwx /tmp
# alle Files, die zur Laufzeit geaendert werden, muessen nach /tmp/...
# gelinkt werden
mkdir /tmp/var
mkdir /tmp/var/log
mkdir /tmp/var/lock
mkdir /tmp/var/run
mkdir /tmp/etc
#################################################################
Corvin
Robert & Patricia Warner wrote:
>
> Hi,
>
> I'm noticing that linux requires a few files to be generated at startup.
> I'm using a disk on chip, aka flash disk, with rtlinux and am trying to
> minimize the re-writing of data on the disk. Is it possible to use a small
> number of ramdisks and/or nfs disks to act as the directories where the
> above mentioned data gets written? i.e. directory aliasing??? I don't know
> if it's called this or not. What commands/scripts would I need to use to
> set this up if the above is feasable?
>
> Thanks for your help
> Bob Warner
>
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--
Corvin Zahn <[EMAIL PROTECTED]>
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