Changes between Version 7 and Version 8 of Internal/OpenFlow/QuickStart

Timestamp:

Feb 15, 2011, 8:15:23 PM (14 years ago)

Author:

akoshibe

Comment:

—

Internal/OpenFlow/QuickStart

@@ -204 +204 @@
  * /sbin/sysctl : system specs/status
  * /sbin/dmesg : display system message buffer
+ * /sbin/mount : show mounted devices (good for [#flash troubleshooting SD card issues])
  * scp : better (more intuitive, I think) than ftp 
 
@@ -838 +839 @@
 The switch may also boot with the default image if the image on the SD card is corrupt. This is usually indicated by the message "Loading from dev0" and not recognizing [#ofcom OpenFlow specific commands]. 
 
+Sometimes the switch will stop mounting the SD card without any apparent cause. The SD card is recognized as `sdmem0a` by the OS - in this case it will not show up if you do `/sbin/mount`. The apparent symptoms are:
+
+ * unrecognized !OpenFlow commands
+ * nothing shows up under /mnt
+
+If this was caused by someone accidentally removing the card, rebooting will fix this issue. If not, your best bet is to just prepare a new card.  
+
 The worst case scenario is a corrupted SD card. This may be caused by various reasons, including buggy firmware, improper restart, or using a card over 128MB. Symptoms include:
 
- * the device not starting up/loading the default image
+ * the device not starting up
+ * the device loading the default image
  * scrambled/truncated filenames (e.g. 'openflow.conf' showing up as 'openf~l.con') 
  * inability to create virtual switches
 
-The most surefire way to fix this is to reformat the SD card. The easiest way to do it is to use a Windows machine. When the card shows up under "Devices", right click and go to 'Format'. A window saying "Format Secure Digital Storage Device" should pop up. Set "Allocation Unit size" to "default allocation size", and click 'Start'. You may need to confirm that you want to reformat the card. The card should be good to go in about a minute or so. 
+The most surefire way to fix this is to get a new card, or reformat the problematic one. The easiest way to do it is to use a Windows machine. When the card shows up under "Devices", right click and go to 'Format'. A window saying "Format Secure Digital Storage Device" should pop up. Set "Allocation Unit size" to "default allocation size", and click 'Start'. You may need to confirm that you want to reformat the card. The card should be good to go in about a minute or so. 
 
 [[BR]]