#10071 NORM 1.5-fir: external SD cards not working on XO-1.5

[Zarro Boogs per Child]

#10071: external SD cards not working on XO-1.5
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           Reporter:  sascha_silbe         |       Owner:  wmb at firmworks.com
               Type:  defect               |      Status:  closed           
           Priority:  normal               |   Milestone:  1.5-firmware     
          Component:  ofw - open firmware  |     Version:  1.5-C2           
         Resolution:  fixed                |    Keywords:                   
        Next_action:  test in release      |    Verified:  0                
Deployment_affected:                       |   Blockedby:                   
           Blocking:                       |  
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Comment(by mikus):

 Replying to [comment:5 wmb at firmworks.com]:
 > It's possible that the device is taking a long time to respond to reads
 of certain blocks - perhaps due to internal error correction or retrying
 or being busy with background wear leveling.  I suspect that Linux retries
 data timeouts a few times, so maybe a subsequent try would work.  I think
 we saw cases on XO-1 where the timeout was too short, so there were lots
 of timeouts, but the only thing you noticed at the user level was that
 some operations took nearly forever.

 XO-1  (q2e44)  I keep the develop.sig on the "permanent" SD card in each
 XO (as well as in /security in jffs2).  Bought a new SD card (make+model
 same as what I already had).  With this new SD card, OFW would give me an
 "10 timeout" while trying to access /security/develop.sig on that SD card
 - and would go on to use /security/develop.sig from jffs2.  Then suddenly
 OFW stopped getting that "10 timeout" -- now that new SD card works as I
 expect it to.  [I myself had made no changes to OFW, nor to the SD card,
 when that problem spontaneously went away.]

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Ticket URL: <http://dev.laptop.org/ticket/10071#comment:11>
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