#10182 HIGH Not Tri: add image_to_fec to build system

[Zarro Boogs per Child]

#10182: add image_to_fec to build system
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 Reporter:  rsmith        |                 Owner:  cjb          
     Type:  task          |                Status:  new          
 Priority:  high          |             Milestone:  Not Triaged  
Component:  build-system  |               Version:  not specified
 Keywords:                |           Next_action:  never set    
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
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 Quanta uses our multicast-on-the-wire code to blast images onto the
 production machines.  These images need to be pre-processed with code that
 blocks them up and adds the forward error correction.

 The code can be found here:

 git://dev.laptop.org/users/wmb/multicast-nand

 image_to_fec is the tool used to build the fec images.

 Usage is:
 image_to_fec <image_in> <erasesize> <image_out> <redundancy>

 our erase size is 131072 and 10 (10%) is a good redundancy number for
 wired.

 so

 image_to_fec os204.zd 131072 os204.nbl 10

 (I beleve we called the resulting images nbl or nbi for nandblaster linear
 and nandblaster interleaved)  We are only using linear right now as
 interleaved images caused very bad performance writing to the SD.

 This needs to get wired into the build system for anything getting sent to
 the factory.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10182>
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