[gmx-users] xtc vs. trr file

[Mark Abraham]

On 1/11/2011 3:30 PM, Juliette N. wrote:
> Dear all,
>
> I am low on disk space and need to delete trr files. I turned on -x 
> option in all runs so generated xtc files as well. Just wondering if 
> xtc files contain less information than trr ones which make xtc have 
> less size. Am I going to lose any information other than velocities?

See 
http://www.gromacs.org/Documentation/How-tos/Reducing_Trajectory_Storage_Volume

Mark