On 07/01/2012 10:40 PM, Jean-Pierre André wrote: > Hi, > > I have put a debug version of ntfs-3g on > http://b.andre.pagesperso-orange.fr/debug-ntfs-3g.tar.gz > > This contains two executables (debug-ntfs-3g and > debug-lowntfs-3g), which run on most Linux systems > without installing anything. Just decompress and make > executable. They are equivalent to the latest version > and should be safe, however they are about twice > slower than usual ntfs-3g and lowntfs-3g because > of extra code added to collect timing details. > > Start (as root, in a separate window) by : > "debug-ntfs-3g -o options device mountpoint" > (or debug-lowntfs-3g if you usually use lowntfs-3g) > where options represent your usual options (the > ones in /etc/fstab), and the device is not mounted. > > Unmount as usual (e.g umount mountpoint). > > After unmounting a log file is created in ntfs.log > in the directory from which you started ntfs-3g). > Please send me back this file, with details of > how you have used ntfs-3g. > > Also please post the output of "ntfsinfo -fm device" > > Note : you may try both ntfs-3g and lowntfs-3g, > in case you get different results (they are > generally much similar). > > Regards > > Jean-Pierre > > > g4hx wrote: >> Hello everyone, >> >> I much appreciate your work on the ntfs-3g driver, I think that ntfs is >> the only file system that can be used on linux and windows together. >> However, there seems to be a performance problem with the ntfs-3g driver: >> I get write rates of about 3 mb/s as opposed to about 90 mb/s with >> different file system types on the same disk. Also I have a very high >> CPU load, caused by the mount.ntfs process. > >
Hello Jean-Pierre, first of all, thanks for the fast reply, I am very impressed. Also I did not mean to imply that you guys are not doing your very best to help improve ntfs-3g. I attached the files that you wanted to see. During the mount with the debug-* programs I of course also ran dd to produce some relevant data. You may also notice that this particular ntfs partition is inside of a truecrypt container. This does not seem to be the issue as the same happens on partitions which are not encrypted. Also I think it unlikely that the issue is related to fragmentation since the problem also occurs with another partition which should be relatively clean. g4hx
ntfs.tar.bz2
Description: application/bzip
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