Mount ext2fs operation not permitted

B

balanga

I have a 128GB USB stick on which I created a 10GB linux-data using gpart. The partition was formatted ext2fs and a number of Linux ISOs were copied to it after mounting it. FreeBSD's pkg grub2 is also installed on the USB stick and I can successfully but some of the Linux distros using grub. After I reboot and start FreeBSD (11.0-RELEASE) I am unable to mount the ext2fs partition.
Code: 
mount -t ext2fs /dev/da0s2 /mnt
mount: /dev/da0s2: Operation not permitted

Occasionally the mount does work, but most often not.

Any suggestions as to what might be wrong? Has the partition been left in an unmountable state?

I tried fsck.ext2 /dev/da0s2 and got the following error
Code: 
Error writing file system info: Invalid argument
 
tobiam said:
You want to add -o ro as a flag, because it cannot be mounted in a writeable mode currently.
Click to expand...

Sorry, but i really have a need to write in a ext2fs.
Is not possible mount an ext2fs r/w any way ??
A fair amount of Internet pages, even FreeBSD book, consider it possible. What happened ?
 
It normally is possible, but in my case I had a problem which I was unable to resolve.

Do you have an ext2fs and have you tried to mount it? What was the error?
 
tobiam said:
You want to add -o ro as a flag, because it cannot be mounted in a writeable mode currently.
Click to expand...

Sorry, but i really have a need to write in a ext2fs.
Is not possible mount an ext2fs r/w any way ??
A fair amount of Internet pages, even FreeBSD book, consider it possible. What happened ?
 
Hi Balanga,

First of all, i cannot mount as a regular user, even who is in operator group. I cannot mount to write as well.

$ sudo mount -t ext2fs /dev/da0s1 /media/da0s1/
mount: /dev/da0s1: Operation not permitted

ls -l /dev/da*
crw-rw-rw- 1 root operator 0x8d 24 abr 11:52 /dev/da0
crw-rw-rw- 1 root operator 0x90 24 abr 11:52 /dev/da0s1

vfs.usermount: 1

[]s

JL
 
balanga said:
What's the output from gpart show or gpart list da0.
Click to expand...

$ gpart show da0
=> 63 2930277105 da0 MBR (1.4T)
63 2930272002 1 linux-data (1.4T)
2930272065 5103 - free - (2.5M)

$ gpart list da0
Geom name: da0
modified: false
state: OK
fwheads: 255
fwsectors: 63
last: 2930277167
first: 63
entries: 4
scheme: MBR
Providers:
1. Name: da0s1
Mediasize: 1500299265024 (1.4T)
Sectorsize: 512
Stripesize: 0
Stripeoffset: 32256
Mode: r1w0e0
rawtype: 131
length: 1500299265024
offset: 32256
type: linux-data
index: 1
end: 2930272064
start: 63
Consumers:
1. Name: da0
Mediasize: 1500301910016 (1.4T)
Sectorsize: 512
Mode: r1w0e0
 
acheron said:
Have you tried with sysutils/fusefs-ext4fuse?
Click to expand...

Yeah !! I am still in read-only mode.

$ sudo ext4fuse /dev/da0s1 /media/da0s1/

$ df
Filesystem 512-blocks Used Avail Capacity Mounted on
/dev/fuse 0 0 0 100% /media/da0s1

$ ls /media/da0s1/
ls: /media/da0s1/: Operation not permitted

$ sudo ls /media/da0s1/
Daredevil-FreeBSD11-15fev2017 lost+found msps VM
e-Books Machines OLD
FreeBSD Movies Pictures

$ sudo touch /media/da0s1/TESTE
touch: /media/da0s1/TESTE: Function not implemented
 
balanga said:
disktype /dev/da0s1 ?
Click to expand...

$ disktype /dev/da0s1

--- /dev/da0s1
Character device, size 1.365 TiB (1500299265024 bytes)
Ext2 file system
Volume name "jlBACKUP"
UUID D3DF2652-BD76-4620-926D-EC31631E1F64 (DCE, v4)
Last mounted at "/media/jl/jlBACKUP"
Volume size 1.365 TiB (1500299264000 bytes, 366284000 blocks of 4 KiB)
 
Can it be that you are trying to actually access ext4, rather than an earlier version supporting writes? The errors you receive seem to suggest that.

To check that use:

file -sL /dev/da0s2

In that case according to the manual page ext2fs(5), the handbook (see the note) and the readme of ext4fuse you will be out of luck with either of those two drivers.
 
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