[Trac #614] Can't boot image with SD card reader

[Zarro Boogs per Child]

#614: Can't boot image with SD card reader
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 Reporter:  Nat                  |        Owner:  wmb at firmworks.com
     Type:  defect               |       Status:  new              
 Priority:  normal               |    Milestone:  BTest-3          
Component:  ofw - open firmware  |   Resolution:                   
 Keywords:                       |  
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Changes (by wmb at firmworks.com):

  * milestone:  BTest-2 => BTest-3

Comment:

 The "doesn't boot at all" problem is OFW, but the "goes into the GUI for
 one second" problem is probably not.

 I think the root cause of the OFW issue is that multi-card readers have
 multiple logical unit numbers (LUNs) for the different slots.  The
 automatic "disk" device detection code always tries LUN 0, and if the card
 is plugged into a slot that uses a different LUN, OFW's boot code won't
 find it.  In many cases, the following workaround will work:
    ok devalias  disk  /usb at f,4/disk at 1    \ or @2 or @3, depending on the
 card slot
    ok boot-configure
    ok boot

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Ticket URL: <http://dev.laptop.org/ticket/614#comment:2>
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