I wiped my portable harddrive and when I went to remount it as USER, it's not writeable.

/dev/sdc1 ---> /run/media/blah/123blahblah567/
When I ls -l /run/media/blah/123blahblah567 it's RWX------

This got me to thinking (since I have never really had to do this before):
What is the most Slackware correct way to set ownership and permissions on portable drives?

Do I CHOWN/CHMOD /dev/sdc1 ?
Do I CHOWN/CHMOD /media/run/blah ?
Do I CHOWN/CHMOD /media/run/blah/123blahblah567 ?

Usually, you would
Because that is where it is mounted.

https://www.man7.org/linux/man-pages/man1/chown.1.html

When you insert a removable disk, it is managed with udev.

On Slackware the udev rules for it are by default in private access for the user logged in.

You should not correct the permissions by hand with chmod and chown for those devices. It probably won't work.

If you want shared mounts, you can change the default in an udev rule above the default one in /usr/lib*/udev

The change will work with all removable devices. Or else select the one you want in the udev rule.

Else you can also mount with :
> udisksctl mount -b /dev/XXX in a console with your other user logged.
Unmount with :
> udisksctl unmount -b /dev/XXX

=========
/etc/udev/rules.d/99-udisks2.rules

# UDISKS_FILESYSTEM_SHARED
# ==1: mount filesystem to a shared directory (/media/VolumeName)
# ==0: mount filesystem to a private directory (/run/media/$USER/VolumeName)
# See udisks(8)
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{UDISKS_FILESYSTEM_SHARED}="0"

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What is the return of the command:
?

You need to be in "plugdev" group

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What do you mean by "wiped":
If I were to say I "wiped a hard-drive", then the hard-drive would have NO partitions, and no formatting, and every byte would have been over-written at least once.

I completely forgot about udev. I'm so used to not messing with this that I forgot how it works. Thanks!

This is why I ask you guys stuff.



I meant that I reformatted the partition.

What file system did you choose when formatting? Some file systems does not care about the concept of users and groups. Other file systems lets you choose owner at formatting (default root).

regards Henrik

Ext4. All of my portable drives (not thumb drives) are Ext4.

I have a few Windows machines but, there's nothing on them except games so I don't bother to back them up.


My Linux boxes.... I have quite a few so, I back them up on Ext4 portable drives.

Have you unplugged it without unmounting it first?
That's probably set the dirty bit so it now mounts with -o ro and you may have to run fsck on it before mounting it with -o rw again.

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Unless you give some special options to mke2fs, by default the ext4 file system will be owned by root and only the root user will have write access to the top level directory. This is even if you created the file system as a normal user. However, if you give the option:

The top level directory will be owned by the user that created the file system. Be aware that when moving a portable drive like this between different systems those systems need to have /etc/passwd and /etc/group syncronized in some way, manually or with a service like NIS or LDAP to have the same point of view of which user has which numerig uid and which group has which gid.

regards Henrik

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I'm really good about umounting soooo, probably not. But, you may be right, I may have slipped. I was doing ALOT of drive swapping that day.



Good point... 99% of the time I'm root when using these drives. They are my backup drives and I always rsync as root to/from these. Now, I can't remember if I was USER when this happened. I may have been.