Diff of two .root files

[Andrew1]

Okay, maybe this contains the answer:

Binary files differ when TFile generated on different PCs

I am creating absolutely the same TTree obgects in TFile on 3 different PCs ( 2 athlons and 1 pentium) , all of which run RH 9 ( withh all current updates) and all 3 resultant root files are different when I check them with diff or md5sum. Contents are the same though when I look at the data in TBrowser. Why is binary representation different ? Its not like I am comparing windows to linux, and even then, shouldn’t TFile generate same binary format files ? Same root version, same file syst…