What does fsck mean? I always thought it was those strange bearded sysadmins private cuss word as they always seem to scream *fsck yes damnit!!!* whenever the system crashes....
On 10/2/09, frantisek holop <min...@obiit.org> wrote: > hmm, on Fri, Oct 02, 2009 at 07:31:39PM +0200, Otto Moerbeek said that >> > fsck -y >> > >> > after a power or other type of failure, >> > in cases the automatic file system check fails? >> >> If that was a wisething to do, we would have already done so. In other >> words, it is not wise. It's foolish. > > as usually, i absolutely agree with you Otto. > > however. > > please all the people in the room raise their hands who have the > faintest idea about what 95% of the questions that fsck is going to ask > them on a seriously borked fs mean. my hat goes off to them. > > here's the thing: even though every single diagnostic message > fsck may produce is documented in /usr/share/doc/smm/03.fsck_ffs > i dont see how these questions help at all. what i mean is, > there is nothing to compare the diagnostic data to anyway, so > what is the answer going to be based on? so far i have always > only took the leap of faith and pressed yes or always.. what > else is there to do? > > a couple of months ago, after a certain incident on my notebook > i was presented with a borked suberblock and after i have > figured out that the backup superblock were usable, i just > crossed my fingers and after a dry run i started fsck. > > i got some 7700 'UNKNOWN FILE TYPE's, an unallocated root inode, > bad magic numbers for CGs and fsck messages i have never had the > luck meeting with before... (should read 03.fsck_ffs one of > these days probably -- but even then, i would just say yes > on every question) > > unfortunately i dont have a transcript of that fsck session, > i do however have a "screenshot" of the last phase: > > ** Phase 5 - Check Cyl groups > CG 0: BAD MAGIC NUMBER > FREE BLK COUNT(S) WRONG IN SUPERBLK > SALVAGE? yes > > SUMMARY INFORMATION BAD > SALVAGE? yes > > BLK(S) MISSING IN BIT MAPS > SALVAGE? yes > > 118774 files, 4966785 used, 2542705 free (17073 frags, 315704 blocks, 0.2% > fragmentation) > > UPDATE STANDARD SUPERBLOCK? yes > > > MARK FILE SYSTEM CLEAN? yes > > > ***** FILE SYSTEM WAS MODIFIED ***** > > (for the curious: all my files survived under lost+found. i was > as happy as it can be) > > if fsck thinks there is a problem, there is nothing left but to press y > anyway. although i'd very much like to read stories of other admins > doing otherwise. > > -f > -- > atheism is a non-prophet organization. > > -- Sent from my mobile device http://www.glumbert.com/media/shift http://www.youtube.com/watch?v=tGvHNNOLnCk "This officer's men seem to follow him merely out of idle curiosity." -- Sandhurst officer cadet evaluation. "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." -- Gene Spafford learn french: http://www.youtube.com/watch?v=30v_g83VHK4
