#11233 NORM Not Tri: XO-1 usb and sd boot does not work in 11.2.0

[Zarro Boogs per Child]

#11233: XO-1 usb and sd boot does not work in 11.2.0
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 Reporter:  fanoush       |                 Owner:               
     Type:  defect        |                Status:  new          
 Priority:  normal        |             Milestone:  Not Triaged  
Component:  not assigned  |               Version:  not specified
 Keywords:                |           Next_action:  never set    
 Verified:  0             |   Deployment_affected:               
Blockedby:                |              Blocking:               
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 previous OS versions booted fine without any change when same build files
 were in internal jffs2 or on SD card or on USB stick. With 11.2.0 it look
 like this no longer works.

 When I boot from USB or SD slot the initrd prints many lines of something
 similar to 'chdir to /lib/modules failed' and finally something like 'Root
 device not found, sleeping forever'.

 When examining initrd files in /boot I found that there are actually two
 initial ramdisks, one initrd below 2MB size and one actrd having ~5MB. The
 5MB one does have /lib/modules inside while the normal initrd does not.

 When replacing initrd by actrd the chdir /lib/modules error message is
 gone, and I see usb modules inserted and I see mass storage module
 detecting the usb device but it printed another messages about
 "scsi_wait_scan module not found" and again root device not found.

 I am using SD card with single ext3 partition with fs label "OLPCRoot" in
 usb card reader or directly in SD slot (just like it works with previous
 OS versions).

 Then I extracted initrd with gzip and cpio, copied /lib/modules from
 actdrd, repacked and can confirm the original initrd code behaves exactly
 the same as actrd one.

 Then I found file cmdline/20olpc-boot-cmdline.sh inside intrd that checks
 boot device from ofw and hardcodes root=/dev/sda2 with this code:
 if [ -z "$root" ]; then
         # if no root device was specified, use OFW bootpath to find root
  ...
                /pci/usb@*) root="/dev/sda2" ;; # external USB, assume
 partitioned


 So I changed sda2 to sda1 but it still does not boot with same message -
 root device not found. Sorry that I don't have exact error messages but
 the device does not boot so I cannot copy them directly.

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Ticket URL: <http://dev.laptop.org/ticket/11233>
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