#10844 NORM Not Tri: remove unused filesystem blocks from .zd files

[Zarro Boogs per Child]

#10844: remove unused filesystem blocks from .zd files
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 Reporter:  Quozl         |                 Owner:  Quozl        
     Type:  enhancement   |                Status:  new          
 Priority:  normal        |             Milestone:  Not Triaged  
Component:  not assigned  |               Version:  not specified
 Keywords:                |           Next_action:  communicate  
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
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 As part of #9411 it was requested that "''OFW knows to only write
 blocks/chunks where data actually resides, rather than writing out a full
 4gb of data every time''".

 Since OFW cannot reasonable identify which blocks contain data (requires
 extensive processing and support for ext2, ext3, and ext4), we instead
 move this responsibility to olpc-os-builder.

  * fix olpc-os-builder to exclude unused filesystem blocks,
  * fix XO-1.5 OpenFirmware to accept .zd files with missing blocks,
  * fix XO-1.75 OpenFirmware to accept .zd files with missing blocks.

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Ticket URL: <http://dev.laptop.org/ticket/10844>
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