[GRASS-user] GIS Lock issue

[William Kyngesburye]

ah, trying to open GRASS data on a Time Machine backup is probably not a good idea.  It's a snapshot of your computer at a point in time, so it's possible it made the backup when you had the GRASS data open on your MacBook HD and thus has the lock file.  Time Machine backups also have some extra data attached to them to make them difficult to change files (not a true read-only setup).  And the way backups work using hard links, you could affect files in other backup times.

Generally - don't mess with the backup, use a non-backup external drive to store your data.  Or if the backup drive is big enough, save the data to a separate folder from the Time Machine backups.

On May 4, 2012, at 4:29 AM, Bulent Arikan wrote:

> Dear List,
> 
> I am running GRASS 6.5 (2012) on Snow Leopard. I want to access a Mapset, have GRASS run analyses, and save new maps on an external HD.  I use this external HD to back up the same computer I am running the GRASS. When I direct GRASS to browse the 'grassdata' folder on the external HD and start GUI from a Mapset (Permanent or others) I get this error:
> 
> /Volumes/MacBook Pro Backup/Backups.backupdb/Bulent Arikan’s MacBook Pro/2011-10-25-113623/Ari Bub/Users/bulentarikan/grassdata/TR_WGS84_37N/PERMANENT/.gislock: Permission denied
> ERROR: /Applications/GRASS_6.5/GRASS-6.5.app/Contents/MacOS/etc/lock:
> Unable to properly access /Volumes/MacBook Pro Backup/Backups.backupdb/Bulent Arikan’s MacBook Pro/2011-10-25-113623/Ari Bub/Users/bulentarikan/grassdata/TR_WGS84_37N/PERMANENT/.gislock
> Please notify system personel.
> logout
> 
> [Process completed]
> 
> I am not running concurrent sessions and I know that GIS Lock is a feature but is there a way to get around this, so that I can save time by directly having some very large-size maps stored in external HD?
> 
> Thank you.
> 
> 
> BÜLENT ARIKAN, PhD
> Senior Research Fellow
> Research Center for Anatolian Civilizations
> Koç University
> İstiklal Caddesi No: 181 Merkez Han
> Beyoğlu - ISTANBUL
> TURKEY
> 34433
> (+ 90) 212-393-6036
> 
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-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

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