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Sugar on a Stick/Stick Layout (view source)
Revision as of 22:31, 26 September 2010
, 22:31, 26 September 2010no edit summary
It has been shown that if you take a stick that is stuck at login and you copy over a fedora-overlay file from a working stick, the stick will boot again. Thus we are confident that the problem is corruption of the overlay file.
It has been shown that if you take a stick that is stuck at login and you copy over a fedora-overlay file from a working stick, the stick will boot again. Thus we are confident that the problem is corruption of the overlay file.
: It may also be exhaustion of the overlay. See [[LiveOS image]]. --[[User:FGrose|FGrose]] 22:31, 26 September 2010 (EDT)
''Next Steps'' - Try some alternate file structures.
''Next Steps'' - Try some alternate file structures.
# Create a Fedora Full Install USB Stick, restart it a bunch of times and see if it does better. How much space will the Fedora Full Install take?<br>So far its > 4GB http://wiki.sugarlabs.org/go/VMware#Full_Install_with_F11_Net_install_CD_to_USB_Stick
# Create a Fedora Full Install USB Stick, restart it a bunch of times and see if it does better. How much space will the Fedora Full Install take?<br>So far its > 4GB http://wiki.sugarlabs.org/go/VMware#Full_Install_with_F11_Net_install_CD_to_USB_Stick
# Create an Open Suse USB Stick, restart it multiple times and see if it fails. How much space does it use?
# Create an Open Suse USB Stick, restart it multiple times and see if it fails. How much space does it use?[http://wiki.sugarlabs.org/go/Sugar_on_a_Stick/Linux/openSUSE] Note the second partition for persistence
# Create Alternate ex3 File Structured, non-live, blueberry USB [http://people.sugarlabs.org/bernie/soas-2-blueberry-direct-2GB.img.xz] (The resulting partition size on the USB can be resized with gparted if more storage is needed)[http://people.sugarlabs.org/Tgillard/soas-2-blueberry-direct-cleared-3GB.txt]
''Background Links''
''Background Links''
Here is an idea for an alternative USB Format: [[http://wiki.sugarlabs.org/go/Sugar_on_a_Stick/USB_format]]
Here is an idea for an alternative USB Format: [[http://wiki.sugarlabs.org/go/Sugar_on_a_Stick/USB_format]]
Also see Ticket 907 [[http://dev.sugarlabs.org/ticket/907]]
Also see Ticket {{Bug|907}}
A 2 GB USB is about $.60 more then a 1GB stick. If we need to compress less to get robustness its ok for us to require a 2GB USB. A 4GB stick is about $2.50 more then a $1GB Stick.
A 2 GB USB is about $.60 more then a 1GB stick. If we need to compress less to get robustness its ok for us to require a 2GB USB. A 4GB stick is about $2.50 more then a $1GB Stick.
''Theories that have evidence against them''
''Theories that have evidence against them''
*ext4 and data loss:http://lwn.net/Articles/322823/ (It looks like ext3 formatting may be more robust in a USB)
Dave Bauer was able to replicate the failure easily by restarting a Sugar stick. This means its probably not:
Dave Bauer was able to replicate the failure easily by restarting a Sugar stick. This means its probably not:
There was a detailed discussion thread back in February at: http://lists.laptop.org/pipermail/devel/2009-February/022987.html
There was a detailed discussion thread back in February at: http://lists.laptop.org/pipermail/devel/2009-February/022987.html
If we understood how to win and we had our own stick creation activity perhaps we would have less failures.
If we understood how to win and we had our own stick creation activity perhaps we would have less failures.
*Look at How To Sugarize liveusb-creator:[http://wiki.sugarlabs.org/go/Category_talk:Live_USB] for a working method to do this.
====Sticks are of poor quality====
====Sticks are of poor quality====
Yes they are, but its not at all clear to me that that correlates with the sticks that are failing.
Yes they are, but its not at all clear to me that that correlates with the sticks that are failing.
'''Current experements on delayed writes from cache in live usb's '''[http://wiki.sugarlabs.org/index.php?title=Talk:Sugar_on_a_Stick/Stick_Layout&action=edit&redlink=1]
====There is a bug around restarting====
====There is a bug around restarting====
It is very common to fail after a restart, the system forgets its supposed to go to Sugar. See ticket 1069 [[http://dev.sugarlabs.org/ticket/1069]]
It is very common to fail after a restart, the system forgets its supposed to go to Sugar. See ticket {{bug|1069}}