#9792 NORM 1.5-har: mount: block device /dev/mmcblk0p1 is write-protected, mounting read-only

Zarro Boogs per Child bugtracker at laptop.org
Wed Dec 2 22:05:49 EST 2009

#9792: mount: block device /dev/mmcblk0p1 is write-protected, mounting read-only
 Reporter:  Quozl       |                 Owner:  wad                              
     Type:  defect      |                Status:  new                              
 Priority:  normal      |             Milestone:  1.5-hardware-C                   
Component:  hardware    |               Version:  Development build as of this date
 Keywords:  os50 q3a18  |           Next_action:  diagnose                         
 Verified:  0           |   Deployment_affected:                                   
Blockedby:              |              Blocking:                                   
 Context: XO-1.5 B2 (QUOZL F), Q3A16, OS50 plus kernel 20091202.

 Problem: spurious write-protect during boot on internal MicroSD card,
 affecting only the first partition.  Result was that /bootpart was mounted
 ro after boot, and ''olpc-update'' failed (which triggered my
 investigation).  /proc/mounts showed ro for mmcblk0p1.  Manual remount rw
 worked.  tty1 had message ''mount: block device /dev/mmcblk0p1 is write-
 protected, mounting read-only'' twice; once immediately after ''dracut:
 Mounted root filesystem /dev/mmcblk0p2'' and the second time during
 ''olpc-configure''.  The B2 has not been physically opened since shipment
 to me.

 mount -o remount -o rw /dev/mmcblk0p1

 Paul reported on #olpc-devel that the kernel patch that ignores write-
 protect was removed in the past days.

Ticket URL: <http://dev.laptop.org/ticket/9792>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system

More information about the Bugs mailing list