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evoweiss
Veteran
Joined: 07 Sep 2003
Posts: 1678
Location: Edinburgh, UK
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 Posted: Sat Jan 31, 2009 6:36 pm Post subject: Cannot write to external USB drive |
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Hi all,
I just installed a new external USB drive. I formatted it and am using the ext4 filesystem.
Anyway, there's a problem. While I can, as a user, mount the drive without any trouble at all, whenever I try to write a file to it I get the following:
| Code: | | touch: cannot touch `/mnt/usbdrive/test': Permission denied |
Mind you, there's no problem with root writing files and I can read any files that are written to the drive by root.
I'm using udev and the fstab entry for this drive is:
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/dev/sda1 /mnt/usbdrive ext4 noauto,rw,user,exec 0 0
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Thus, it seems to be a basic permissions issue, though I'm fairly certain that I'm in the right groups, etc.
Best,
Alex |
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evoweiss
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Joined: 07 Sep 2003
Posts: 1678
Location: Edinburgh, UK
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| Posted: Sat Jan 31, 2009 6:58 pm Post subject: |
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Hi all,
I'm not sure if I solved it or not, but it involved a weird bit of mojo that I read somewhere.
Basically, I did the following:
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mount /mnt/usbdrive
chown username /mnt/usrb
touch /mnt/usbdrive/test
umount /mnt/usbdrive
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Then, when I remounted, the ownership, etc. was back to root. However, I could read, write, etc. to the drive normally. I'm going to try and reobot to see whether this state of affairs remains.
Best,
Alex |
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krinn
Watchman
Joined: 02 May 2003
Posts: 7471
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| Posted: Sat Jan 31, 2009 10:02 pm Post subject: Re: Cannot write to external USB drive |
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| evoweiss wrote: |
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/dev/sda1 /mnt/usbdrive ext4 uid=1000,gid=100,noauto,rw,user,exec 0 0
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if cat /etc/password | grep 1000:100 = your username, you'll be fine |
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evoweiss
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Joined: 07 Sep 2003
Posts: 1678
Location: Edinburgh, UK
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| Posted: Sat Jan 31, 2009 10:18 pm Post subject: Re: Cannot write to external USB drive |
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| krinn wrote: | | evoweiss wrote: |
| Code: |
/dev/sda1 /mnt/usbdrive ext4 uid=1000,gid=100,noauto,rw,user,exec 0 0
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if cat /etc/password | grep 1000:100 = your username, you'll be fine |
Well, that is my username, though when I do this it tells me the wrong filesystem is being used, etc.
Alex |
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