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RE: remount md0 after disc failure



G'day Bob/others,
Not sure where the brain was as /home would be mounted under /root.

Let's test that when I started /home was under /root, I just mounted /home
on md0, when I rebooted it was empty! Why? ... because there was no /home on
md0 in the first place so mount must have created a new /home therefore it's
empty, yes?

If there was a /home with data on md0 then mount would not have had to
create it, yes? hmmm.

OK, let's try it, df, /home is mounted on /dev/md0. Check contents of /home
then umount /home, check /home directory, empty as expected. Reboot ...,
hmmm, /home is NOT! empty, why? .. df, home is mounted on /dev/md0.

So fstab is remounting /home, so should hda disc fail, & I put an image of
it back and reboot there's nothing to do, right?

What if the disk is not the same size/shape/colour would that change things?

Well I answered my own questions hopefully, lol, just the last one, any
ideas?
tia
Lindsay

 | Lindsay
 |
 | What confused me was that you said:
 |
 | > My question is: If hda fails and I replace it, reinstall
 | debian then umount
 |
 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 | > /home from / then mount /home on md0 the system will be
 | restored and I'll
 | > have access to my old /home directory, right/wrong?
 |
 | After you reinstalled debian you would not have anything to unmount.
 | You will have a clean installation.  At that time you can mount your
 | new volume on top of the empty /home directory and you should be
 | fine.
 |
 | Me thinking now that perhaps you were going to create a disk partition
 | during the debian install for /home and put some disk space there,
 | then unmount that later.  That is the only way I could see to have
 | disk space to unmount later.  But then that space would be wasted.  No
 | need to do that.
 |
 | > I have an aversion (from experience) to locating OS's and data
 | on the same
 | > drive.
 |
 | Sure, it is fine to have OS and data on separate disks.  A common
 | configuration.
 |
 | But because of that choice I see that you come from a background where
 | when you need to reinstall the os it means scrape the disk clean and
 | start fresh.  Therefore put your data on a separate disk.  HP-UX,
 | Redhat, others are certainly that way.  There is no way to upgrade.
 | You must scrape clean and install the new version fresh.  But with
 | Debian I have never needed to do that.  I have always been able to
 | keep the system up to date with a continous update forward.  It is one
 | of the reasons I like using debian.
 |
 | In any case, hope the discussion helps.
 |
 | Bob
 | ---

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