Live Disc with Persistence

Phill Whiteside PhillW at Ubuntu.com
Tue Aug 13 20:21:18 UTC 2013


I have a 4GB 'ready-boost' usb stick, which is happy with lubuntu. Scandisk
do make decent USB sticks, so I'd guess they would fine.

Regards,

Phill.

On 13 August 2013 21:16, Nio Wiklund <nio.wiklund at gmail.com> wrote:

> On 2013-08-12 20:57, John Hupp wrote:
> > On 8/11/2013 12:33 PM, John Hupp wrote:
> >> I have 4GB and 8GB flash drives currently serving as Live USB drives
> >> with persistence running Quantal and Saucy.  For the sake of
> >> troubleshooting the Flash/LightDM-login problems more invasively, I
> >> would like to make another Live setup with persistence running Raring,
> >> but I don't have another bigger flash drive on hand.
> >>
> >> But I do have several 1GB flash drives.  I tried making a Live USB
> >> with one of those, setting persistence storage to 100MB (via
> >> UNetBootin).  But when I tried to use it I kept getting
> >> no-space-available sorts of errors.  So I concluded that 1GB was too
> >> small to serve both for the Live USB and the persistence storage.
> >> True?  (Though I think I observed after the fact that UNetBootin had
> >> preserved some files and folders that were already on the drive, so
> >> maybe I just need to try again after deleting everything or formatting.)
> >>
> >> I then tried to set up a Raring Live DVD with persistence using either
> >> a flash drive or the internal hard drive, but so far have failed.
> >>
> >> In one case I used Gparted (I don't know where I was using that, since
> >> I don't now find it in the installed version of Raring) to create a
> >> single ext3 partition labeled casper-rw to serve as the persistence
> >> storage, but that didn't work for me.
> >>
> >> For two other cases I began by running in a terminal:
> >>     dd if-/dev/zero of=casper-rw bs=1M count=768
> >>     mkfs.ext3 -F casper-rw
> >> Then I copied the resulting casper-rw file both to a flash drive and
> >> to the hard drive, but booting with the Live disc and either of those
> >> running did not result in successful persistence.
> >>
> >> Can anyone see what I was doing wrong?
> >>
> >
> > I tried again to make a Live USB with persistence, all on the 1GB stick,
> > this time after reformatting (FAT32) and then setting only 50MB for
> > persistence in UNetBootin.  And it did have persistence (as in my
> > earlier attempt), but 50MB doesn't seem to be enough to do much.  Trying
> > to Reload Synaptic, it again yielded the "no space left on the device"
> > error.
> >
> > I also tried again to get to a workable Live DVD with persistence on a
> > USB flash drive.  In Gparted, I deleted the existing partition, created
> > a single FAT32-type partition labeled "casper-rw," then formatted the
> > partition as FAT32.  I booted to the Live DVD with the flash drive
> > inserted (choosing F6 Options and adding " persistent" to the boot
> > string), made some changes, rebooted again the same way and found that
> > the changes had not been saved.
> >
> > So apparently I'm still missing something.
> >
> Hi John,
>
> If you manage to get persistence with 50 MB, you are doing it the
> correct way. So you should be able to use all remaining space after the
> iso is installed (I guess close to 300 MB on a 1 GB pendrive or flash
> card). But I think even 300 MB will be full rather soon. If it does not
> work when you increase the size of the persistent file, I think
> something might be bad with the device or the file system. Or maybe it
> is just too slow.
>
> An oversized CD iso or DVD iso will leave less space for persistence,
> and I would not bother trying to squeeze persistence into a 1 GB drive.
>
> I bought a cheap ten-pack with 4 GB Sandisk USB 2 pendrives, that I can
> use for testing various things. But it is much nicer to have USB 3 for
> persistent live and installed systems because it is much faster when
> writing huge amounts of small files. (USB 3 pendrives are also faster in
> USB 2 ports, because the flash hardware is faster.) Also an old HDD,
> that you connect via USB 2, will be faster than a USB 2 pendrive for the
> same reason. See this link (Prerequisites: the paragraph about speed).
>
> https://help.ubuntu.com/community/Installation/FromUSBStick
>
> 4 GB is also enough to install Lubuntu (not a persistent live system,
> but installed like it were installed to a HDD). See these links
>
> https://help.ubuntu.com/community/InstalledSystemFakePAE
>
>
> https://drive.google.com/folderview?id=0B46yhFQuJvfPRXRvSmJ6b0xoNE0&usp=sharing
>
> This link is faster for downloading the image file
>
>
> http://phillw.net/isos/lubuntu-fake-pae/raring/installed-system/dd_saucy-a2-installed-system_4GB.img.gz
>
> md5sum:
> cd2cc5cfa751a163e19304981f6f44a2  dd_saucy-a2-installed-system_4GB.img.gz
>
> Best regards
> Nio
>
>
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