[SOLVED] Writing data on a 'linux' hard-disk-partitioning

[Aquilegiafolium]

Hello all,

I'm quite new with linux and have a generally low experience with computers, but I wanted to try out linux with knoppix (and leave windows intact)

So I created in linux a hard-disk partition using 'QTParted' using a ext3 partitioning.
Afterwards this partitioning showed up on my desktop as sda3 (other 2 partitionings are windows using ntfs system)

But now the problem is that i can't write on this partition i designed to be used for linux-files (it's read-only)

To solve this i tried the following:
-On the desktop i clicked 'right' on the icon of the sda3 partition, mounting it and using actions -> change read-write mode
This seemed to work and asking for the properties gave me some info:
Ownership: knoppix
and i could make it writable by all users under the properties and permissions.

Now I tried to open the sda3-partition using 'Konqueror', I could open the sda3 partition 'located' on my desktop upon which i got transferred to the same partition on another location: /media/sda3, but I could make folders or other new files here, it refused me access when trying to write data.

Now i tried changing the permissions using the 'properties' of the sda3 located in the /media/sda3.. This didn't work since ownership was by 'root' and i couldn't access permissions, since i wasn't owner.

My next attempt was a bit more fruitful. Using the prompt-box, i could enter /media/sda3, but still not create files with 'mkdir' and others, but I could make folders and files after using 'su' which transferred me to the 'root' (I don't know how this works actually but found it in a 'linux for dummies' manual.

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Now my question: Is there a way to make this partition writable for me or to change 'ownership' of the /media/sda3 partition from 'root' to 'knoppix' so I can write other data than just directories and textfiles on this partition?

Or is knoppix just unsuited to safe data on hard-disk and should i try another version of linux?
All this protection is very nice since it's possible to overwrite windows files and such, but i'd like to store some info on a more reliable place than my ram : p

Your help is very much appreciated : )

[b2bwild]

When you mount that partition. use option "umask=0 0 0"
so others have permission to write and read the data

[devils casper]

Are you using LiveCD of Knoppix or installed it on Harddisk?

You have to change ownership of Linux Partition to enable read/write access.
Execute id command and note down User and Group Id.
Execute chown command to change ownership.

id
chown -R user_id:group_id  /media/sda3

When you mount that partition. use option "umask=0 0 0"
so others have permission to write and read the data

umask works for non-Linux partitions only.

[b2bwild]

umask works for non-Linux partitions only.

Oh, yeah I forgot that one
glad you figure it out.

[Aquilegiafolium]

Thank you very much! It worked : D
I use live-cd by the way

:happy with my new hard-disk-partition now : )

[devils casper]

Glad to help you !
Do start a new thread if you have any other question.