Very cool. Thanks for the explanation. I think I understand the basics--let me know if I'm on the right track:
Before HC, the filesystem in kernel space had a limited size partition for data and a limited size partition for media. The data partition was invisible and inaccessible to the user. In HC, we have a data folder and media folder on the same partition in kernel space. The FUSE in user space allows the user access to the media folder but not the data folder. On Mar 1, 11:04 am, David Turner <[email protected]> wrote: > On Fri, Feb 25, 2011 at 5:59 PM, Pete2s <[email protected]> wrote: > > Thanks for the link--it's a lot of helpful information. > > > Could you or someone explain what Google made different in HC to tear > > down the distinction between app memory and media memory? > > We removed USB mass storage support (which essentially *requires* to expose > a FAT32 partition/volume to the connect PC, which then requires the > partition to be FAT32). > Instead, we now use the MTP protocol, which is a higher-level protocol that > allows the device to use any kind of partition/filesystem scheme to expose > the data. > > The data itself appears to applications through a FUSE daemon that ensures > that the typical FAT32 brain-damage (e.g. total lack of permissions) is > maintained when accessed > through the /media folder. But it is really stored in the internal (shared) > flash storage. > > > I thought > > for security and copyright reasons, a secured partition that stored > > apps could not be mounted as a drive. With the Xoom, it appears you > > can still mount the drive that stores both apps and media. > > > I can't really comment on this, sorry. I doubt you can mount the /data > > partition though. > > > > > On Feb 25, 12:50 am, Al Sutton <[email protected]> wrote: > > > Yes -http://groups.google.com/group/android-contrib/msg/36507d312cfcae00 > > > > Al. > > > ====== > > > Funky Android Limited is registered in England & Wales with the company > > number 6741909. > > > > The views expressed in this email are those of the author and not > > necessarily those of Funky Android Limited, it's associates, or it's > > subsidiaries. > > > > On 25 Feb 2011, at 06:32, Pete2s wrote: > > > > > On the Motorola Xoom, there is no longer a distinction between memory > > > > for apps and memory for media. In the past, Android devices had a > > > > secure partition only for apps. For the user, this often resulted in > > > > wasted space--if you liked apps, you could quickly run out of app > > > > space even though GBs were free for media; or you could fill up your > > > > media space and be unable to store more songs despite having GBs of > > > > free space allocated only for apps. > > > > > Will we see a similar memory architecture on phones? > > > > > -- > > > > You received this message because you are subscribed to the Google > > Groups "Android Discuss" group. > > > > To post to this group, send email to [email protected]. > > > > To unsubscribe from this group, send email to > > [email protected]. > > > > For more options, visit this group athttp:// > > groups.google.com/group/android-discuss?hl=en.- Hide quoted text - > > > > - Show quoted text - > > > -- > > You received this message because you are subscribed to the Google Groups > > "Android Discuss" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group at > >http://groups.google.com/group/android-discuss?hl=en.- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Android Discuss" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/android-discuss?hl=en.
