vinícius mota wrote: > > Briefly, the problem is that the copy speed between the partition in > which I am running my Fedora and another partition where I store backup > data is now 50K/s, which is extremely slow by any standart (it has been > usually around 10M/s, almost 200 times faster). Wow, that's slow between partitions. > One of the disks is partitioned between two operational > systems, Fedora 14 64 and Windows 7 64, and the other disk contains the > above referred partition where I store my backups (I call it backup > disk). > I login into the windows and > made a copy of some AVI files (3G approx) to the backup disk, which went > normally So hardware is ok and, also, Windows' disk handlers are probably ok. > I move data within the backup iself disk using windows also without any > problem. I don't think this would move the files, would it? Wouldn't the directory entries, only, change? Could you try a 'copy' within the backup (under windows), just to be sure. Preferably something quite large. > I try therefore to make the inverse process, a copy from the > backup disk into my home folder in Fedora. It went normally, copying 4 G > also within few seconds, actually with an excellent speed of 50M/s. > Good > [Google might show] one cause could be that the source file system (in my > case the Fedora home folder) would be near its full capacity. I wouldn't have thought so; to me it looks much more like a data problem on the destination, or a problem in the F14 disk handlers (but would have been quite widely reported, by now?). It is clear that you have been using Fedora for some time so I expect you have already done what I will ask, but you did not say. My first thought on reading the symptoms was that, possibly, the backup partition is getting full with 'wastebasket/recyclebin' files, which have to be 'deleted for real' before the 'new files' that you are copying can be copied. And, maybe, Windows is a little bit faster at that than F14 NTFS handlers (maybe). Maybe F14 is 'deleting for real' at a single sector at a time, or something? I wonder, also, if the number of IO reads and writes on the backup disk could be measured and reported; that might provide a clue as to whether there is excessive processing, or whether there is otherwise some software delay. But I do not know how to measure IO transactions. > > He is the line of my /etc/fstab file which defines my backup disk, with > the label common > > LABEL=common /home/vinicius/Desktop/common ntfs > auto,user,sync 0 0 > Am I correct in thinking that 'sync' disables write-caching? It might be interesting to change that, and see if performance is still just as bad. Best of luck, Ron _______________________________________________ laptop mailing list laptop@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/laptop
