[GRASS-windows] Using an external hard drive as data source

[Glynn Clements]

Hanlie Pretorius wrote:

> I'm using GRASS on two machines in different locations (one Win XP,
> the other Ubuntu 10.04), so I would like to keep my grassdata folder
> on an external drive. However, when I try to run grass in Ubuntu using
> the external hard drive (NTFS file system), I get the following error
> as soon as I've selected the new data location and the GUI starts to
> load:
> -----
> Execution failed: 'g.region -u -g -p -c'
> 
> Details:
> Error: MAPSET PERMANENT - permission denied
> -----
> 
> To run GRASS, I use the command 'sudo grass -wx'.
> 
> GRASS works fine when I run it from the internal hard drive.
> 
> Is there a way to get GRASS to work from the external drive?

You must be the owner of the directory for the current mapset.

If you're mounting a FAT filesystem, you can use the uid= mount option
to set the ownership of the files. However, I don't know what the
situation is with NTFS, as it has its own permission model.

-- 
Glynn Clements <glynn at gclements.plus.com>