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From: Sthu Deus on 10 Jul 2010 03:30
Thank You for Your time and answer, Andrei:

> No. You have to find a way to unmount the partition you want to
> format.

And no way to make such may virtual unmounting - may something like
kernels are now updated on the fly?

> Make a minimal installation in some space that you can spare
> temporarily (ex. swap partion). Make sure that you can access both
> the old partition and the external clone. Reformat as needed and
> clone back your system.

I have thought about this too, but the problem is that I have - on the
targeted for formatting drive - single partition, and though I can
make out of single - two - through some hard work - finally, I will get
my reduced partition formatted as needed (w/ ext4 FS) but that small
partition will remain - that I have no idea how to use latter nor I
want it at all...

I can not boot from the USB - I do see the exact option in it menu
and dmidecode tells me the same:

Boot from CD is supported
Selectable boot is supported
LS-120 boot is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Boot-up State: Safe

I tried all the options in the menu, connecting IDE CD-ROM w/ bootable
Debian through IDE-to-USB adapter. - No any effect.


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From: Sthu Deus on 10 Jul 2010 04:10
Thank You for Your time and answer, Boyd:

> pivot_root is supposed to do this in a way that allows you to umount
> the old '/' cleanly. It is used in modern initramfs.

I think I this is what I was looking for.
But did You have any experience w/ it? - Works "stably"?

> You can use some of the ext4 features on a existing file system by
> using tune2fs to turn them on. That would eliminate the need for a
> "format" and re- install.

OK. Point taken.


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From: Sthu Deus on 10 Jul 2010 04:20
Thank You for Your time and answer, Tom:

> You can use all of an ext4's features on an ext2/ext3 system / upgrade
> an ext2/ext3 filesystem to ext4 with tune2fs.

And there is no any disadvantages comparing it was made w/ the
mkfs.ext4 help or tune2fs?


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From: Tom H on 10 Jul 2010 09:40
On Sat, Jul 10, 2010 at 3:45 AM, Sthu Deus <sthu.deus(a)gmail.com> wrote:
> Thank You for Your time and answer, Tom:
>
>> You can use all of an ext4's features on an ext2/ext3 system / upgrade
>> an ext2/ext3 filesystem to ext4 with tune2fs.
>
> And there is no any disadvantages comparing it was made w/ the
> mkfs.ext4 help or tune2fs?

You're welcome.

None that I know of. A "tune2fs -l" returns the same data.


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From: Boyd Stephen Smith Jr. on 10 Jul 2010 23:50
On Saturday 10 July 2010 02:43:28 Sthu Deus wrote:
> Thank You for Your time and answer, Boyd:
> > pivot_root is supposed to do this in a way that allows you to umount
> > the old '/' cleanly. It is used in modern initramfs.
>
> I think I this is what I was looking for.
> But did You have any experience w/ it? - Works "stably"?

No. At least not running it manually.

I'm pretty sure my initramfs uses it each time I cold boot, so it is stable.
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