Am Mittwoch, 9. Oktober 2002 10:18 schrieb Oleg Drokin: > Hello! > > On Wed, Oct 09, 2002 at 11:06:36AM +0300, Robert Tiismus wrote: > > > Also you probably want to run reiserfsck on that disk to make sure > > > no other damage happened. > > > > Thank you. Reiserfsck said that all is ok. It's just that I have seen > > nothing > > This is good. > > > similar happening with other filesystems. I would prefer disappearing > > data to leaking data. Am I completely wrong, when I say that because of > > 'tail packing' in ReiserFS, it can leak information with more > > probability than, lets say ext2 or ufs or...? Will notails option give > > No, tail packing should have no effect on leakign data. > Anyway tail packing is only takes effect for files less than 16K in size. > > > me more secure FS? I have to assure company management, and myself, that > > this > > notails will have no effect on that. > > > incident happened not because I put ReiserFS on new server. It could > > have happened also with other filesystems :) > > Indeed it seems that you've got either some metadata altered (block > pointers) or the block content swapped somehow, both of which could happen > on any FS with absolutely same results. > BTW, I just remembered that until you apply Chris' Mason "data logging" > patches, there is a certain window where system crash would lead to > "deleted" data appearing at the end of files that were appended before the > crash. (that's it, metadata is already updated and list newly allocated > blocknumbers, but old content od those blocks is still intact since crash > prevented system from putting new content in there), but since you've got > other file's data in the middle of file, this is not the case.
Oleg, I "see" it from time to time during kernel and DRI development (X server crashes), too. This times without Chris's stuff. 2.4.19-ck5 (latest ReiserFS patches for 2.4.19) and now with 2.5.40-ac3. Most times "messages", "localmessages", kernel .o.*, dep files, etc. are broken (wrong stuff or mixed stuff). Latest my ".q3a/baseq3/q3key" file (DRI SMP tests) was broken (completely other stuff in it) even though it only should opened for reading. -Dieter PS I send you a compressed copy of my "messages" file in private.
