One pendrive for all PC (Intel/AMD) computers

[Andre Campos Rodovalho]

> 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>:

> 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>>:
> >
> >     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
> >
> >     .
> >
> >     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
> >
>
>
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