[SOLVED] lfs verion 8.4 read only file system

percy_vere_uk · 04-02-2019, 08:50 AM

Hi

I have just followed 'linux from scratch Version 8.4'

The system boots up OK but I seem to be unable to write to any files.

Boot scripts show:

Code:

.
VFS: Mounted root (ext4 filesystem) read only on device 259:1

.
Looking at the permissions as an example the / directory gives:

Code:

drwxr-xr-x   2 root   root  4096 Mar 22 10:29 bin
drwxr-xr-x   2 root   root  4096 Apr  1 13:35 boot
drwxr-xr-x   2 root   root  4096 Mar  8 13:59 dev
drwxr-xr-x  15 root   root  4096 Apr  2 12:55 etc
drwxr-xr-x   3 root   root  4096 Mar 21 13:47 home
drwxr-xr-x   7 root   root  4096 Mar 21 13:26 lib
drwxr-xr-x   2 root   root  4096 Mar 11 13:02 lib64
drwx------   2 graham root 16384 Mar  4 14:12 lost+found
drwxr-xr-x   4 root   root  4096 Mar 11 12:40 media
drwxr-xr-x   3 root   root  4096 Mar 29 14:21 mnt
drwxr-xr-x   2 root   root  4096 Mar 11 12:40 opt
drwxr-xr-x   2 root   root  4096 Mar  8 13:58 proc
drwxr-x---   2 root   root  4096 Apr  2 13:37 root
drwxr-xr-x   3 root   root  4096 Mar 30 11:07 run
drwxr-xr-x   2 root   root  4096 Apr  2 13:01 sbin
drwxrwxrwt   3 graham root  4096 Apr  2 13:37 sources
drwxr-xr-x   2 root   root  4096 Mar 11 12:40 srv
drwxr-xr-x   2 root   root  4096 Mar  8 13:58 sys
drwxrwxrwt   2 root   root 20480 Apr  2 13:10 tmp
drwxr-xr-x  13 graham root  4096 Mar  6 14:17 tools
drwxr-xr-x  10 root   root  4096 Mar 11 12:40 usr
drwxr-xr-x  10 root   root  4096 Mar 11 12:44 var

This appears to be the case right through all directories.

But when I try to write to any of the files as root I get 'read ony file system'

/var/log/boot.log is empty and shows permissions of : -rw-r--r--

Any ideas on the cause of this please?

percy

tyler2016 · 04-02-2019, 10:40 AM

Could you post the output of:

Code:

cat /etc/mtab
cat /etc/fstab

You might be able to do a remount of your root filesystem. Try this as root:

Code:

mount -o remount /dev/your_root_partition /

Remounting is just a temporary fix. You will still need to figure out why / isn't mounted rw at boot.

hazel · 04-02-2019, 11:16 AM

Just for interest, what kind of drive are you using? I've never seen a major device number as high as that for a disk.

percy_vere_uk · 04-03-2019, 07:34 AM

.....................
tyler2016 wrote
.....................

After booting into system:

Quote:

cat /etc/mtab

Code:

cat /etc/mtab      (file was empty)

Quote:

cat /etc/fstab

Code:

# Begin /etc/fstab

# file system  mount-point  type     options             dump     fsck
#                                                                 order

/dev/sda17     /             ext4    defaults                          1       1
/dev/sda3      swap       swap     pri=1                            0       0
proc             /proc        proc     nosuid,noexec,nodev    0       0
sysfs            /sys          sysfs    nosuid,noexec,nodev    0       0
devpts         /dev/pts   devpts   gid=5,mode=620         0       0
tmpfs          /run         tmpfs    defaults                        0       0
devtmpfs     /dev        devtmpfs mode=0755,nosuid   0       0

# End /etc/fstab

Quote:

mount -o remount /dev/your_root_partition /

This seems to have done the trick. But has to be repeated after re-boot.

--------------------------------------------------------------------------------------------
.................
hazel wrote
.................

Quote:

Just for interest, what kind of drive are you using? I've never seen a major device number as high as that for a disk.

Code:

*-disk
             description: ATA Disk
             product: ST1500LM006 HN-M
             vendor: Seagate
             physical id: 0.0.0
             bus info: scsi@4:0.0.0
             logical name: /dev/sda
             version: 0002
             serial: S35LJ9FG300023
             size: 1397GiB (1500GB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=d40a1a5

Thanks for your input on this Folks!

tyler2016 · 04-03-2019, 08:10 AM

Good, we know you have a working disk and filesystem. I wonder if for some reason the /etc/init.d/mountfs isn't being run? What is the output of this:

Code:

cd /etc/rc.d
find . -name "*mountfs"

percy_vere_uk · 04-03-2019, 08:48 AM

.....................
tyler2016 wrote
.....................

Quote:

cd /etc/rc.d
find . -name "*mountfs"

Code:

./init.d/mountfs

tyler2016 · 04-03-2019, 09:30 AM

Ok. I think your lfs-bootscripts may have a problem. You are missing some files. You should have a file called /etc/rc.d/rcS.d/S40mountfs. What happens when you do this:

Code:

ls /etc/rc.d/rcS.d

I would go back and install the lfs bootscripts again. I just took a look at the Makefile. Reinstalling them won't hurt anything.

http://www.linuxfromscratch.org/lfs/...otscripts.html

percy_vere_uk · 04-04-2019, 07:51 AM

tyler2016

I have re-installed lfs bootscripts.

All looks OK now.

Thanks very much for your help.

percy