Why read-only rootfs is mounted.

[raviphu...@gmail.com]

Dear All,

I'm trying to port linux on beaglebone using Buildroot.

But rootfs is mounted as read-only, but I need write-enable. What shall I do

Following is snap of my configurations

1.Kernel configuration file as below .............

# Boot options

#

CONFIG_USE_OF=y

CONFIG_ZBOOT_ROM_TEXT=0x0

CONFIG_ZBOOT_ROM_BSS=0x0

# CONFIG_ARM_APPENDED_DTB is not set

CONFIG_CMDLINE="console=ttyO0,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext4 rootwait"

# CONFIG_CMDLINE_FROM_BOOTLOADER is not set

# CONFIG_CMDLINE_EXTEND is not set

CONFIG_CMDLINE_FORCE=y

2.During boot ..................

[    1.429267] Waiting for root device /dev/mmcblk0p2...

[    1.500222] mmc0: host does not support reading read-only switch. assuming write-enable.

[    1.511263] mmc0: new high speed SDHC card at address 1234

[    1.517496] mmcblk0: mmc0:1234 SA04G 3.63 GiB 

[    1.524363]  mmcblk0: p1 p2 p3(data partition)

[    1.541758] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem

[    1.549498] EXT4-fs (mmcblk0p2): write access will be enabled during recovery

[    1.562266] EXT4-fs (mmcblk0p2): recovery complete

[    1.797961] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)

[    1.806553] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.

[    1.817957] devtmpfs: mounted

[    1.821336] Freeing init memory: 116K

3.after booting ................

# cat /proc/cmdline 

console=ttyO0,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait

Please help me

thanx in advance

Ravi

[Koen Kooi]

Op 24 mei 2013, om 14:12 heeft raviphu...@gmail.com het volgende geschreven:

> Dear All,
> I'm trying to port linux on beaglebone

Wasn't linux already ported to beaglebone over a year ago?

[Frank Hunleth]

On Fri, May 24, 2013 at 8:12 AM, <raviphu...@gmail.com> wrote:
>
> Dear All,
> I'm trying to port linux on beaglebone using Buildroot.
>
> But rootfs is mounted as read-only, but I need write-enable. What shall I do
>

Buildroot's default is to mount the root filesystem as read-only.
There's an option in the Buildroot configuration menus under "System
Configuration" to change this. It is the
BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW option in the config file.

Or you could manually remount the root filesystem by running:

mount -o remount,rw /

[ravi phulsundar]

Thanx Frank,

It worked, Thanx again.

Ravi

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