RcarGen3: Not use 64bits ext4 feature on SDcard FS

Change-Id: I8fc03f7db2ecfa6085eda0e83f723bffa992e9df
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 5 insertions, 2 deletions

diff --git a/getting-started/machines/R-Car-Starter-Kit-gen3.md b/getting-started/machines/R-Car-Starter-Kit-gen3.md
index 1631c51..1a8320a 100644
--- a/getting-started/machines/R-Car-Starter-Kit-gen3.md
+++ b/getting-started/machines/R-Car-Starter-Kit-gen3.md
@@ -25,7 +25,7 @@ Before setting up the build environment, you need to download the proprietary dr
 
 * Download Renesas graphics drivers with a "click through" license from Renesas website [Link][rcar Linux Drivers]
     * Under the Target hardware: **R-Car H3/M3** section.
-    
+
 #### Note:
 
 * You have to register with a free account on MyRenesas and accept the license conditions before downloading them the drivers.  
@@ -215,7 +215,7 @@ sudo fdisk /dev/sdc
 * Initialize the ext4 partition using “mke2fs”; for example, if the microSD card is associated with *sdc*:
 
 ```
-sudo mke2fs -t ext4 /dev/sdc1
+sudo mke2fs -t ext4 -O ^64bits /dev/sdc1
 
   mke2fs 1.42.13 (17-May-2015)
   Creating filesystem with 3911168 4k blocks and 979200 inodes
@@ -229,6 +229,9 @@ sudo mke2fs -t ext4 /dev/sdc1
   Writing superblocks and filesystem accounting information: done
 ```
 
+> **CAUTION**: Gen3 boards don't understand 64bits blocks used when filesystem
+> is formated with *64bits* feature so make sure you don't use it.
+
 ### Copying the built image to the SD-card
 
 Insert the SD-card into your build host: