On Aug 12, 4:06 am, Manny <[email protected]> wrote: > I have been using TiddlyWiki on the same USB drive fore several years. > I recently bought a new XP computer.XP Professional. Using the exact > same USB drive, it is sometimes impossible to save the TiddlyWiki > file.
It is possible that the new operating system is handling the USB drive's existing fragmentation badly. (Not badly necessarily, but perhaps correctly, which is bad in your case.) I have been using USB drives for storing all of my active TiddlyWikis for several years. As they start reaching full capacity they become less tolerant of multiple backups in any particular directory. A directory with a large number of backups will eventually start giving 'failed to save' errors. At first deleting the multiple backups works. However as time goes by the 'failed to save' error is triggered with less and less backups. Backups notwithstanding, i.e. perhaps you don't keep multiple backups, the nature of TiddlyWiki invites constant changes and multiple saves. Few people know or understand the real file management of storage devices. Most of us know however that erasing a file actually only modifies the directory to that file but leaves the data to be overwritten at a later date. This results in fragmentation, which most of us are now aware of and that hard drives need to be defragmented from time to time. The rise of flash drives have brought on new problems and new techniques. (Don't even consider defragging a USB drive it's a different animal altogether) However some storage devices (e.g., some USB flash drives) and some file systems utilize so-called wear-leveling mechanisms to extend the lifetime of the storage device or medium. These mechanisms ensure that even if an application repeatedly writes data to the same logical sector, the data is distributed evenly across the medium (logical sectors are remapped to different physical sectors). Therefore, multiple "versions" of a single sector may be created and may or may not be made available. I believe that the nature of TiddlyWiki to be constantly saved, backups notwithstanding, will eventually cause certain sections of a flash drive to become unavailable to it. Flash drives do have a limited life; for this, and for other reasons, one should always keep this in mind. Morris Gray http://twhelp.tiddlyspot.com A TiddlyWiki help file for beginners http://twt-treeview-executive.tiddlyspot.com/ The ultimate TiddlyWiki On Aug 12, 4:06 am, Manny <[email protected]> wrote: > I have been using TiddlyWiki on the same USB drive fore several years. > I recently bought a new XP computer.XP Professional. Using the exact > same USB drive, it is sometimes impossible to save the TiddlyWiki > file. The message reads: "Failed to Save The main TiddlyWiki file. > Your Changes Have not been saved" Other files (such as "Notepad") will > save to the USB drive just fine. There is no "block/unblock" option on > the TiddlyWiki file, just "Read Only", "Hidden", and "Archive". The > file refuses to save whether "Archive" is checked or unchecked. There > is at least 1 Gig left on the drive and it does sometimes save. > > Any help would be greatly appreciated > > Manny --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/TiddlyWiki?hl=en -~----------~----~----~----~------~----~------~--~---
