Joe,
Thanks!
I also enjoy using debian on a huge USB drive rather, but I keep
wondering if this is safe or not. Very good explanation!
One more question, if you mount a read-only file system, how can you
save something later on? for example, if the file system is read
only, how could you create some temperary files duing the operation?
Is it possible to make /bin read only but /tmp read-write?
Tom
--- In Joe Bouchard <> wrote:
>
> On Mon, Nov 27, 2006 at 11:14:54PM -0000, chentom60 wrote:
> > Hello,
> >
> > After 7250 boots up, I am using "loadUSBModules.sh"
and "loadUSB.sh" to
> > chroot to USB file system. I am wondering what is the difference
> > between this method and using RamDisk to boot to a mini file
system
> > first then pivot root to USB? Are they virtually same thing?
>
> Let me give you another scenerio which might make a good example.
I have a
> bootable linux CD, aka Timos rescue disk, which I can use on a
regular Intel PC.
> When it starts it says "do you want to (a) run from CD, or (b) load
the whole
> O/S into RAM." If I run from CD when I issue commands it hunts the
CD for the
> executables, but if I load it all into RAM, I can remove the CD,
and the whole
> O/S runs from RAM. The first case requires the CD, but not much
RAM. The
> second case requires the CD only long enough to load an image into
RAM, then it
> takes a lot of RAM.
>
> Once you chroot to something else, you end up in the place you
chroot'ed to, and
> it matters little how you got there, so you might say it is
virtually the same
> thing. One other difference is that you have to take deliberate
steps to free
> up the RAM you tied up with the RamDisk. I presume TSlinux does
this for you.
>
> >
> > Is using USB,CF drive a safe way to work around the limitation of
on
> > board flash memory?
> >
>
> On my TS-7200 I routinely use a CF card as my main disk instead of
the the tiny
> onboard flash because I want a full featured O/S like I have on my
PC. For
> safety I use ext3 and mount read-only during "production" (aka when
user will
> cycle power at will). I've never had any issues.
>
> Hope that helps.
>
> Joe
>
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