One pendrive for all PC (Intel/AMD) computers

[Israel]

Hi,
I agree with Nio, in theory (or at least from what I can understand
about it) I also think a casper read-write partition would work.  You
might look at the usb-creator source code:
http://bazaar.launchpad.net/~usb-creator-hackers/usb-creator/trunk/files
it is written in Python, so it may take some time to understand the
process.  You might even be able to take some code form it and make
something along the lines of a One Pendrive for all x86 based computers
(well... realistically only 586+ as cmov is not supported in any modern
Ubuntu kernels and neither is non-PAE)


On 06/24/2015 11:34 AM, Andre Campos Rodovalho wrote:
> > I'm thinking about the casper-rw partition. Could it be used for the iso
> > files in a convenient way? Maybe - and it is better to have few
> > partitions, when the drive is small.
>
> Unfortunately I don't know much about casper-rw. I think using it with
> an regular ISO might not be easy. I have no idea how these partitions
> are mounted... Maybe is a custom configuration made by startup disk
> creator!?
>
> I made a usb bootable device with startup disk creator and persistence
> a long time ago. I noticed the content of iso was extracted to the
> drive, and the persistence was made with a file...
>
> 2015-06-24 12:28 GMT-03:00 Nio Wiklund <nio.wiklund at gmail.com
> <mailto:nio.wiklund at gmail.com>>:
>
>     Hi Andre,
>
>     Nice to see you here again. I notice that your tutorial thread at the
>     Ubuntu Forums is attracting many readers :-)
>
>     Yes I know there are advantages with ext partitions and how to tweak
>     them for optimal performance and lifetime on a pendrive, but I didn't
>     want to make the setup too complicated. You may be right, that
>     there are
>     enough advantages with ext filesystems, so that I should store the
>     isofiles there (and have only a small fat32 partition to allow for
>     UEFI
>     booting).
>
>     Anyway, pendrives are often slow, and I have found that rsync behaves
>     much better than zsync, when the target drive for updating is a
>     pendrive. I think this is true also with ext filesystems.
>
>     One big advantage is that there is no need for
>     copying/cloning/flashing
>     from the internal drive to the pendrive. The slowness of the internet
>     connection matches quite well the slowness of a USB 2 connection,
>     so you
>     don't lose much time anyway.
>
>     Fragmentation is another reason to avoid fat 32. I guess I have to
>     watch
>     out for that, but as long as the iso files remain about the same size
>     and the file system is far from full, that should be a small
>     problem in
>     this case.
>
>     I'm thinking about the casper-rw partition. Could it be used for
>     the iso
>     files in a convenient way? Maybe - and it is better to have few
>     partitions, when the drive is small.
>
>     Best regards
>     Nio
>
>
>     Den 2015-06-24 14:35, Andre Campos Rodovalho skrev:
>     > Hey Nio, you can use ext4 partition and grub2 for a BIOS boot. (This
>     > might allow you to zsync, for testing..)
>     >
>     > Another option might be to create a first "boot" partition with
>     > GPT+FAT32, but set up GRUB2 to load images in a second ext4
>     partition,
>     > (where the ISO files will be stored).
>     >
>     > I know this should work, but I had no time to test it out yet...
>     >
>     > Cheers!
>     >
>     >
>     > 2015-06-19 15:43 GMT-03:00 Nio Wiklund <nio.wiklund at gmail.com
>     <mailto:nio.wiklund at gmail.com>
>     > <mailto:nio.wiklund at gmail.com <mailto:nio.wiklund at gmail.com>>>:
>     >
>     >     Hi again :-)
>     >
>     >     There is one minor edit:
>     >
>     >     I wrote 'You can even zsync the Lubuntu daily iso file
>     directly into the
>     >     pendrive for iso-testing.' That was to promise too much. I
>     tried, and
>     >     found that zsync is slow with a slow drive and uses some
>     features of an
>     >     ext file system while we are using fat32. It is better to
>     use *rsync*
>     >     (which is also an alternative in the instructions for
>     iso-testing. I
>     >     made this script for 'wily-desktop-i386.iso',
>     >
>     >     --------------------------------------------------------------
>     >     echo "***** get/update iso file with  rsync:"
>     >     rsync -tzhhP
>     >   
>      rsync://cdimage.ubuntu.com/cdimage/lubuntu/daily-live/current/wily-desktop-i386.iso
>     <http://cdimage.ubuntu.com/cdimage/lubuntu/daily-live/current/wily-desktop-i386.iso>
>     >   
>      <http://cdimage.ubuntu.com/cdimage/lubuntu/daily-live/current/wily-desktop-i386.iso>
>     >     .
>     >
>     >     echo "
>     >     ***** check md5sum:"
>     >     wget -O md5sums
>     >     http://cdimage.ubuntu.com/lubuntu/daily-live/current/MD5SUMS
>     >     grep wily-desktop-i386.iso md5sums>md5sum-desktop
>     >     md5sum -c md5sum-desktop
>     >     --------------------------------------------------------------
>     >
>     >     You need space for two versions of the iso file (plus a
>     little extra
>     >     margin). The old one is not wiped until the new one is complete.
>     >
>     >     Best regards
>     >     Nio
>     >
>
>
>
>


-- 
Regards

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